#$@%#$%!

Ngiler SH3LL 360
: / usr / src / litespeed-wp-plugin / 7.2 / litespeed-cache / src /

Information Server
MySQL : OFF Perl : OFF CURL : ON WGET : OFF PKEXEC : OFF

Directive	Local Value
IP Address	162.0.209.101
System	Linux premium169.web-hosting.com 4.18.0-553.50.1.lve.el8.x86_64 #1 SMP Thu Apr 17 19:10:24 UTC 2025 x86_64
User	luxeelil
PHP Version	8.0.30
Software	LiteSpeed
Doc root	Writable

Edit File : optimize.cls.php \| Size : 37.19 KB
<?php /** * The optimize class. * * @since 1.2.2 / namespace LiteSpeed; defined('WPINC') \|\| exit(); class Optimize extends Base { const LIB_FILE_CSS_ASYNC = 'assets/js/css_async.min.js'; const LIB_FILE_WEBFONTLOADER = 'assets/js/webfontloader.min.js'; const LIB_FILE_JS_DELAY = 'assets/js/js_delay.min.js'; const ITEM_TIMESTAMP_PURGE_CSS = 'timestamp_purge_css'; private $content; private $content_ori; private $cfg_css_min; private $cfg_css_comb; private $cfg_js_min; private $cfg_js_comb; private $cfg_css_async; private $cfg_js_delay_inc = array(); private $cfg_js_defer; private $cfg_js_defer_exc = false; private $cfg_ggfonts_async; private $_conf_css_font_display; private $cfg_ggfonts_rm; private $dns_prefetch; private $dns_preconnect; private $_ggfonts_urls = array(); private $_ccss; private $_ucss = false; private $__optimizer; private $html_foot = ''; // The html info append to <body> private $html_head = ''; // The html info prepend to <body> private static $_var_i = 0; private $_var_preserve_js = array(); private $_request_url; /* * Constructor * * @since 4.0 / public function __construct() { Debug2::debug('[Optm] init'); $this->__optimizer = $this->cls('Optimizer'); } /* * Init optimizer * * @since 3.0 * @access protected / public function init() { $this->cfg_css_async = defined('LITESPEED_GUEST_OPTM') \|\| $this->conf(self::O_OPTM_CSS_ASYNC); if ($this->cfg_css_async) { if (!$this->cls('Cloud')->activated()) { Debug2::debug('[Optm] ❌ CCSS set to OFF due to QC not activated'); $this->cfg_css_async = false; } if ((defined('LITESPEED_GUEST_OPTM') \|\| ($this->conf(self::O_OPTM_UCSS) && $this->conf(self::O_OPTM_CSS_COMB))) && $this->conf(self::O_OPTM_UCSS_INLINE)) { Debug2::debug('[Optm] ⚠️ CCSS set to OFF due to UCSS Inline'); $this->cfg_css_async = false; } } $this->cfg_js_defer = $this->conf(self::O_OPTM_JS_DEFER); if (defined('LITESPEED_GUEST_OPTM')) { $this->cfg_js_defer = 2; } if ($this->cfg_js_defer == 2) { add_filter( 'litespeed_optm_cssjs', function ( $con, $file_type ) { if ($file_type == 'js') { $con = str_replace('DOMContentLoaded', 'DOMContentLiteSpeedLoaded', $con); // $con = str_replace( 'addEventListener("load"', 'addEventListener("litespeedLoad"', $con ); } return $con; }, 20, 2 ); } // To remove emoji from WP if ($this->conf(self::O_OPTM_EMOJI_RM)) { $this->_emoji_rm(); } if ($this->conf(self::O_OPTM_QS_RM)) { add_filter('style_loader_src', array( $this, 'remove_query_strings' ), 999); add_filter('script_loader_src', array( $this, 'remove_query_strings' ), 999); } // GM JS exclude @since 4.1 if (defined('LITESPEED_GUEST_OPTM')) { $this->cfg_js_defer_exc = apply_filters('litespeed_optm_gm_js_exc', $this->conf(self::O_OPTM_GM_JS_EXC)); } else { /* * Exclude js from deferred setting * * @since 1.5 / if ($this->cfg_js_defer) { add_filter('litespeed_optm_js_defer_exc', array( $this->cls('Data'), 'load_js_defer_exc' )); $this->cfg_js_defer_exc = apply_filters('litespeed_optm_js_defer_exc', $this->conf(self::O_OPTM_JS_DEFER_EXC)); $this->cfg_js_delay_inc = apply_filters('litespeed_optm_js_delay_inc', $this->conf(self::O_OPTM_JS_DELAY_INC)); } } /* * Add vary filter for Role Excludes * * @since 1.6 / add_filter('litespeed_vary', array( $this, 'vary_add_role_exclude' )); /* * Prefetch DNS * * @since 1.7.1 / $this->_dns_prefetch_init(); /* * Preconnect * * @since 5.6.1 / $this->_dns_preconnect_init(); add_filter('litespeed_buffer_finalize', array( $this, 'finalize' ), 20); } /* * Exclude role from optimization filter * * @since 1.6 * @access public / public function vary_add_role_exclude( $vary ) { if ($this->cls('Conf')->in_optm_exc_roles()) { $vary['role_exclude_optm'] = 1; } return $vary; } /* * Remove emoji from WP * * @since 1.4 * @since 2.9.8 Changed to private * @access private / private function _emoji_rm() { remove_action('wp_head', 'print_emoji_detection_script', 7); remove_action('admin_print_scripts', 'print_emoji_detection_script'); remove_filter('the_content_feed', 'wp_staticize_emoji'); remove_filter('comment_text_rss', 'wp_staticize_emoji'); /* * Added for better result * * @since 1.6.2.1 / remove_action('wp_print_styles', 'print_emoji_styles'); remove_action('admin_print_styles', 'print_emoji_styles'); remove_filter('wp_mail', 'wp_staticize_emoji_for_email'); } /* * Delete file-based cache folder * * @since 2.1 * @access public / public function rm_cache_folder( $subsite_id = false ) { if ($subsite_id) { file_exists(LITESPEED_STATIC_DIR . '/css/' . $subsite_id) && File::rrmdir(LITESPEED_STATIC_DIR . '/css/' . $subsite_id); file_exists(LITESPEED_STATIC_DIR . '/js/' . $subsite_id) && File::rrmdir(LITESPEED_STATIC_DIR . '/js/' . $subsite_id); return; } file_exists(LITESPEED_STATIC_DIR . '/css') && File::rrmdir(LITESPEED_STATIC_DIR . '/css'); file_exists(LITESPEED_STATIC_DIR . '/js') && File::rrmdir(LITESPEED_STATIC_DIR . '/js'); } /* * Remove QS * * @since 1.3 * @access public / public function remove_query_strings( $src ) { if (strpos($src, '_litespeed_rm_qs=0') \|\| strpos($src, '/recaptcha')) { return $src; } if (!Utility::is_internal_file($src)) { return $src; } if (strpos($src, '.js?') !== false \|\| strpos($src, '.css?') !== false) { $src = preg_replace('/\?./', '', $src); } return $src; } /** * Run optimize process * NOTE: As this is after cache finalized, can NOT set any cache control anymore * * @since 1.2.2 * @access public * @return string The content that is after optimization / public function finalize( $content ) { if (defined('LITESPEED_NO_PAGEOPTM')) { Debug2::debug2('[Optm] bypass: NO_PAGEOPTM const'); return $content; } if (!defined('LITESPEED_IS_HTML')) { Debug2::debug('[Optm] bypass: Not frontend HTML type'); return $content; } if (!defined('LITESPEED_GUEST_OPTM')) { if (!Control::is_cacheable()) { Debug2::debug('[Optm] bypass: Not cacheable'); return $content; } // Check if hit URI excludes add_filter('litespeed_optm_uri_exc', array( $this->cls('Data'), 'load_optm_uri_exc' )); $excludes = apply_filters('litespeed_optm_uri_exc', $this->conf(self::O_OPTM_EXC)); $result = Utility::str_hit_array($_SERVER['REQUEST_URI'], $excludes); if ($result) { Debug2::debug('[Optm] bypass: hit URI Excludes setting: ' . $result); return $content; } } Debug2::debug('[Optm] start'); $this->content_ori = $this->content = $content; $this->_optimize(); return $this->content; } /* * Optimize css src * * @since 1.2.2 * @access private / private function _optimize() { global $wp; $this->_request_url = get_permalink(); // Backup, in case get_permalink() fails. if (!$this->_request_url) { $this->_request_url = home_url($wp->request); } $this->cfg_css_min = defined('LITESPEED_GUEST_OPTM') \|\| $this->conf(self::O_OPTM_CSS_MIN); $this->cfg_css_comb = defined('LITESPEED_GUEST_OPTM') \|\| $this->conf(self::O_OPTM_CSS_COMB); $this->cfg_js_min = defined('LITESPEED_GUEST_OPTM') \|\| $this->conf(self::O_OPTM_JS_MIN); $this->cfg_js_comb = defined('LITESPEED_GUEST_OPTM') \|\| $this->conf(self::O_OPTM_JS_COMB); $this->cfg_ggfonts_rm = defined('LITESPEED_GUEST_OPTM') \|\| $this->conf(self::O_OPTM_GGFONTS_RM); $this->cfg_ggfonts_async = !defined('LITESPEED_GUEST_OPTM') && $this->conf(self::O_OPTM_GGFONTS_ASYNC); // forced rm already $this->_conf_css_font_display = !defined('LITESPEED_GUEST_OPTM') && $this->conf(self::O_OPTM_CSS_FONT_DISPLAY); if (!$this->cls('Router')->can_optm()) { Debug2::debug('[Optm] bypass: admin/feed/preview'); return; } if ($this->cfg_css_async) { $this->_ccss = $this->cls('CSS')->prepare_ccss(); if (!$this->_ccss) { Debug2::debug('[Optm] ❌ CCSS set to OFF due to CCSS not generated yet'); $this->cfg_css_async = false; } elseif (strpos($this->_ccss, '<style id="litespeed-ccss" data-error') === 0) { Debug2::debug('[Optm] ❌ CCSS set to OFF due to CCSS failed to generate'); $this->cfg_css_async = false; } } do_action('litespeed_optm'); // Parse css from content $src_list = false; if ($this->cfg_css_min \|\| $this->cfg_css_comb \|\| $this->cfg_ggfonts_rm \|\| $this->cfg_css_async \|\| $this->cfg_ggfonts_async \|\| $this->_conf_css_font_display) { add_filter('litespeed_optimize_css_excludes', array( $this->cls('Data'), 'load_css_exc' )); list($src_list, $html_list) = $this->_parse_css(); } // css optimizer if ($this->cfg_css_min \|\| $this->cfg_css_comb) { if ($src_list) { // IF combine if ($this->cfg_css_comb) { // Check if has inline UCSS enabled or not if ((defined('LITESPEED_GUEST_OPTM') \|\| $this->conf(self::O_OPTM_UCSS)) && $this->conf(self::O_OPTM_UCSS_INLINE)) { $filename = $this->cls('UCSS')->load($this->_request_url, true); if ($filename) { $filepath_prefix = $this->_build_filepath_prefix('ucss'); $this->_ucss = File::read(LITESPEED_STATIC_DIR . $filepath_prefix . $filename); // Drop all css $this->content = str_replace($html_list, '', $this->content); } } if (!$this->_ucss) { $url = $this->_build_hash_url($src_list); if ($url) { // Handle css async load if ($this->cfg_css_async) { $this->html_head .= '<link rel="preload" data-asynced="1" data-optimized="2" as="style" onload="this.onload=null;this.rel=\'stylesheet\'" href="' . Str::trim_quotes($url) . '" />'; // todo: How to use " in attr wrapper " } else { $this->html_head .= '<link data-optimized="2" rel="stylesheet" href="' . Str::trim_quotes($url) . '" />'; // use 2 as combined } // Move all css to top $this->content = str_replace($html_list, '', $this->content); } } } // Only minify elseif ($this->cfg_css_min) { // will handle async css load inside $this->_src_queue_handler($src_list, $html_list); } // Only HTTP2 push else { foreach ($src_list as $src_info) { if (!empty($src_info['inl'])) { continue; } } } } } // Handle css lazy load if not handled async loaded yet if ($this->cfg_css_async && !$this->cfg_css_min && !$this->cfg_css_comb) { // async html $html_list_async = $this->_async_css_list($html_list, $src_list); // Replace async css $this->content = str_replace($html_list, $html_list_async, $this->content); } // Parse js from buffer as needed $src_list = false; if ($this->cfg_js_min \|\| $this->cfg_js_comb \|\| $this->cfg_js_defer \|\| $this->cfg_js_delay_inc) { add_filter('litespeed_optimize_js_excludes', array( $this->cls('Data'), 'load_js_exc' )); list($src_list, $html_list) = $this->_parse_js(); } // js optimizer if ($src_list) { // IF combine if ($this->cfg_js_comb) { $url = $this->_build_hash_url($src_list, 'js'); if ($url) { $this->html_foot .= $this->_build_js_tag($url); // Will move all JS to bottom combined one $this->content = str_replace($html_list, '', $this->content); } } // Only minify elseif ($this->cfg_js_min) { // Will handle js defer inside $this->_src_queue_handler($src_list, $html_list, 'js'); } // Only HTTP2 push and Defer else { foreach ($src_list as $k => $src_info) { // Inline JS if (!empty($src_info['inl'])) { if ($this->cfg_js_defer) { $attrs = !empty($src_info['attrs']) ? $src_info['attrs'] : ''; $deferred = $this->_js_inline_defer($src_info['src'], $attrs); if ($deferred) { $this->content = str_replace($html_list[$k], $deferred, $this->content); } } } // JS files elseif ($this->cfg_js_defer) { $deferred = $this->_js_defer($html_list[$k], $src_info['src']); if ($deferred) { $this->content = str_replace($html_list[$k], $deferred, $this->content); } } elseif ($this->cfg_js_delay_inc) { $deferred = $this->_js_delay($html_list[$k], $src_info['src']); if ($deferred) { $this->content = str_replace($html_list[$k], $deferred, $this->content); } } } } } // Append JS inline var for preserved ESI // Shouldn't give any optm (defer/delay) @since 4.4 if ($this->_var_preserve_js) { $this->html_head .= '<script>var ' . implode(',', $this->_var_preserve_js) . ';</script>'; Debug2::debug2('[Optm] Inline JS defer vars', $this->_var_preserve_js); } // Append async compatibility lib to head if ($this->cfg_css_async) { // Inline css async lib if ($this->conf(self::O_OPTM_CSS_ASYNC_INLINE)) { $this->html_head .= $this->_build_js_inline(File::read(LSCWP_DIR . self::LIB_FILE_CSS_ASYNC), true); } else { $css_async_lib_url = LSWCP_PLUGIN_URL . self::LIB_FILE_CSS_ASYNC; $this->html_head .= $this->_build_js_tag($css_async_lib_url, 'litespeed-css-async-lib'); // Don't exclude it from defer for now } } /* * Handle google fonts async * This will result in a JS snippet in head, so need to put it in the end to avoid being replaced by JS parser / $this->_async_ggfonts(); /* * Font display optm * * @since 3.0 / $this->_font_optm(); // Inject JS Delay lib $this->_maybe_js_delay(); /* * HTML Lazyload / if ($this->conf(self::O_OPTM_HTML_LAZY)) { $this->html_head = $this->cls('CSS')->prepare_html_lazy() . $this->html_head; } // Maybe prepend inline UCSS if ($this->_ucss) { $this->html_head = '<style id="litespeed-ucss">' . $this->_ucss . '</style>' . $this->html_head; } // Check if there is any critical css rules setting if ($this->cfg_css_async && $this->_ccss) { $this->html_head = $this->_ccss . $this->html_head; } // Replace html head part $this->html_head = apply_filters('litespeed_optm_html_head', $this->html_head); if ($this->html_head) { if (apply_filters('litespeed_optm_html_after_head', false)) { $this->content = str_replace('</head>', $this->html_head . '</head>', $this->content); } else { // Put header content to be after charset if (strpos($this->content, '<meta charset') !== false) { $this->content = preg_replace('#<meta charset([^>])>#isU', '<meta charset$1>' . $this->html_head, $this->content, 1); } else { $this->content = preg_replace('#<head([^>])>#isU', '<head$1>' . $this->html_head, $this->content, 1); } } } // Replace html foot part $this->html_foot = apply_filters('litespeed_optm_html_foot', $this->html_foot); if ($this->html_foot) { $this->content = str_replace('</body>', $this->html_foot . '</body>', $this->content); } // Drop noscript if enabled if ($this->conf(self::O_OPTM_NOSCRIPT_RM)) { // $this->content = preg_replace( '#<noscript>.</noscript>#isU', '', $this->content ); } // HTML minify if (defined('LITESPEED_GUEST_OPTM') \|\| $this->conf(self::O_OPTM_HTML_MIN)) { $this->content = $this->__optimizer->html_min($this->content); } } /** * Build a full JS tag * * @since 4.0 / private function _build_js_tag( $src ) { if ($this->cfg_js_defer === 2 \|\| Utility::str_hit_array($src, $this->cfg_js_delay_inc)) { return '<script data-optimized="1" type="litespeed/javascript" data-src="' . Str::trim_quotes($src) . '"></script>'; } if ($this->cfg_js_defer) { return '<script data-optimized="1" src="' . Str::trim_quotes($src) . '" defer></script>'; } return '<script data-optimized="1" src="' . Str::trim_quotes($src) . '"></script>'; } /* * Build a full inline JS snippet * * @since 4.0 / private function _build_js_inline( $script, $minified = false ) { if ($this->cfg_js_defer) { $deferred = $this->_js_inline_defer($script, false, $minified); if ($deferred) { return $deferred; } } return '<script>' . $script . '</script>'; } /* * Load JS delay lib * * @since 4.0 / private function _maybe_js_delay() { if ($this->cfg_js_defer !== 2 && !$this->cfg_js_delay_inc) { return; } $this->html_foot .= '<script>' . File::read(LSCWP_DIR . self::LIB_FILE_JS_DELAY) . '</script>'; } /* * Google font async * * @since 2.7.3 * @access private / private function _async_ggfonts() { if (!$this->cfg_ggfonts_async \|\| !$this->_ggfonts_urls) { return; } Debug2::debug2('[Optm] google fonts async found: ', $this->_ggfonts_urls); $html = '<link rel="preconnect" href="https://fonts.gstatic.com/" crossorigin />'; /* * Append fonts * * Could be multiple fonts * * <link rel='stylesheet' href='//fonts.googleapis.com/css?family=Open+Sans%3A400%2C600%2C700%2C800%2C300&ver=4.9.8' type='text/css' media='all' /> * <link rel='stylesheet' href='//fonts.googleapis.com/css?family=PT+Sans%3A400%2C700%7CPT+Sans+Narrow%3A400%7CMontserrat%3A600&subset=latin&ver=4.9.8' type='text/css' media='all' /> * -> family: PT Sans:400,700\|PT Sans Narrow:400\|Montserrat:600 * <link rel='stylesheet' href='https://fonts.googleapis.com/css?family=Source+Sans+Pro:400,300,300italic,400italic,600,700,900&subset=latin%2Clatin-ext' /> / $script = 'WebFontConfig={google:{families:['; $families = array(); foreach ($this->_ggfonts_urls as $v) { $qs = wp_specialchars_decode($v); $qs = urldecode($qs); $qs = parse_url($qs, PHP_URL_QUERY); parse_str($qs, $qs); if (empty($qs['family'])) { Debug2::debug('[Optm] ERR ggfonts failed to find family: ' . $v); continue; } $subset = empty($qs['subset']) ? '' : ':' . $qs['subset']; foreach (array_filter(explode('\|', $qs['family'])) as $v2) { $families[] = Str::trim_quotes($v2 . $subset); } } $script .= '"' . implode('","', $families) . ($this->_conf_css_font_display ? '&display=swap' : '') . '"'; $script .= ']}};'; // if webfontloader lib was loaded before WebFontConfig variable, call WebFont.load $script .= 'if ( typeof WebFont === "object" && typeof WebFont.load === "function" ) { WebFont.load( WebFontConfig ); }'; $html .= $this->_build_js_inline($script); // https://cdnjs.cloudflare.com/ajax/libs/webfont/1.6.28/webfontloader.js $webfont_lib_url = LSWCP_PLUGIN_URL . self::LIB_FILE_WEBFONTLOADER; // default async, if js defer set use defer $html .= $this->_build_js_tag($webfont_lib_url); // Put this in the very beginning for preconnect $this->html_head = $html . $this->html_head; } /* * Font optm * * @since 3.0 * @access private / private function _font_optm() { if (!$this->_conf_css_font_display \|\| !$this->_ggfonts_urls) { return; } Debug2::debug2('[Optm] google fonts optm ', $this->_ggfonts_urls); foreach ($this->_ggfonts_urls as $v) { if (strpos($v, 'display=')) { continue; } $this->html_head = str_replace($v, $v . '&display=swap', $this->html_head); $this->html_foot = str_replace($v, $v . '&display=swap', $this->html_foot); $this->content = str_replace($v, $v . '&display=swap', $this->content); } } /* * Prefetch DNS * * @since 1.7.1 * @access private / private function _dns_prefetch_init() { // Widely enable link DNS prefetch if (defined('LITESPEED_GUEST_OPTM') \|\| $this->conf(self::O_OPTM_DNS_PREFETCH_CTRL)) { @header('X-DNS-Prefetch-Control: on'); } $this->dns_prefetch = $this->conf(self::O_OPTM_DNS_PREFETCH); if (!$this->dns_prefetch) { return; } if (function_exists('wp_resource_hints')) { add_filter('wp_resource_hints', array( $this, 'dns_prefetch_filter' ), 10, 2); } else { add_action('litespeed_optm', array( $this, 'dns_prefetch_output' )); } } /* * Preconnect init * * @since 5.6.1 / private function _dns_preconnect_init() { $this->dns_preconnect = $this->conf(self::O_OPTM_DNS_PRECONNECT); if ($this->dns_preconnect) { add_action('litespeed_optm', array( $this, 'dns_preconnect_output' )); } } /* * Prefetch DNS hook for WP * * @since 1.7.1 * @access public / public function dns_prefetch_filter( $urls, $relation_type ) { if ($relation_type !== 'dns-prefetch') { return $urls; } foreach ($this->dns_prefetch as $v) { if ($v) { $urls[] = $v; } } return $urls; } /* * Prefetch DNS * * @since 1.7.1 * @access public / public function dns_prefetch_output() { foreach ($this->dns_prefetch as $v) { if ($v) { $this->html_head .= '<link rel="dns-prefetch" href="' . Str::trim_quotes($v) . '" />'; } } } /* * Preconnect * * @since 5.6.1 * @access public / public function dns_preconnect_output() { foreach ($this->dns_preconnect as $v) { if ($v) { $this->html_head .= '<link rel="preconnect" href="' . Str::trim_quotes($v) . '" />'; } } } /* * Run minify with src queue list * * @since 1.2.2 * @access private / private function _src_queue_handler( $src_list, $html_list, $file_type = 'css' ) { $html_list_ori = $html_list; $can_webp = $this->cls('Media')->webp_support(); $tag = $file_type == 'css' ? 'link' : 'script'; foreach ($src_list as $key => $src_info) { // Minify inline CSS/JS if (!empty($src_info['inl'])) { if ($file_type == 'css') { $code = Optimizer::minify_css($src_info['src']); $can_webp && ($code = $this->cls('Media')->replace_background_webp($code)); $snippet = str_replace($src_info['src'], $code, $html_list[$key]); } else { // Inline defer JS if ($this->cfg_js_defer) { $attrs = !empty($src_info['attrs']) ? $src_info['attrs'] : ''; $snippet = $this->_js_inline_defer($src_info['src'], $attrs) ?: $html_list[$key]; } else { $code = Optimizer::minify_js($src_info['src']); $snippet = str_replace($src_info['src'], $code, $html_list[$key]); } } } // CSS/JS files else { $url = $this->_build_single_hash_url($src_info['src'], $file_type); if ($url) { $snippet = str_replace($src_info['src'], $url, $html_list[$key]); } // Handle css async load if ($file_type == 'css' && $this->cfg_css_async) { $snippet = $this->_async_css($snippet); } // Handle js defer if ($file_type === 'js' && $this->cfg_js_defer) { $snippet = $this->_js_defer($snippet, $src_info['src']) ?: $snippet; } } $snippet = str_replace("<$tag ", '<' . $tag . ' data-optimized="1" ', $snippet); $html_list[$key] = $snippet; } $this->content = str_replace($html_list_ori, $html_list, $this->content); } /* * Build a single URL mapped filename (This will not save in DB) * * @since 4.0 / private function _build_single_hash_url( $src, $file_type = 'css' ) { $content = $this->__optimizer->load_file($src, $file_type); $is_min = $this->__optimizer->is_min($src); $content = $this->__optimizer->optm_snippet($content, $file_type, !$is_min, $src); $filepath_prefix = $this->_build_filepath_prefix($file_type); // Save to file $filename = $filepath_prefix . md5($this->remove_query_strings($src)) . '.' . $file_type; $static_file = LITESPEED_STATIC_DIR . $filename; File::save($static_file, $content, true); // QS is required as $src may contains version info $qs_hash = substr(md5($src), -5); return LITESPEED_STATIC_URL . "$filename?ver=$qs_hash"; } /* * Generate full URL path with hash for a list of src * * @since 1.2.2 * @access private / private function _build_hash_url( $src_list, $file_type = 'css' ) { // $url_sensitive = $this->conf( self::O_OPTM_CSS_UNIQUE ) && $file_type == 'css'; // If need to keep unique CSS per URI // Replace preserved ESI (before generating hash) if ($file_type == 'js') { foreach ($src_list as $k => $v) { if (empty($v['inl'])) { continue; } $src_list[$k]['src'] = $this->_preserve_esi($v['src']); } } $minify = $file_type === 'css' ? $this->cfg_css_min : $this->cfg_js_min; $filename_info = $this->__optimizer->serve($this->_request_url, $file_type, $minify, $src_list); if (!$filename_info) { return false; // Failed to generate } list($filename, $type) = $filename_info; // Add cache tag in case later file deleted to avoid lscache served stale non-existed files @since 4.4.1 Tag::add(Tag::TYPE_MIN . '.' . $filename); $qs_hash = substr(md5(self::get_option(self::ITEM_TIMESTAMP_PURGE_CSS)), -5); // As filename is already related to filecon md5, no need QS anymore $filepath_prefix = $this->_build_filepath_prefix($type); return LITESPEED_STATIC_URL . $filepath_prefix . $filename . '?ver=' . $qs_hash; } /* * Parse js src * * @since 1.2.2 * @access private / private function _parse_js() { $excludes = apply_filters('litespeed_optimize_js_excludes', $this->conf(self::O_OPTM_JS_EXC)); $combine_ext_inl = $this->conf(self::O_OPTM_JS_COMB_EXT_INL); if (!apply_filters('litespeed_optm_js_comb_ext_inl', true)) { Debug2::debug2('[Optm] js_comb_ext_inl bypassed via litespeed_optm_js_comb_ext_inl filter'); $combine_ext_inl = false; } $src_list = array(); $html_list = array(); // V7 added: (?:\r\n?\|\n?) to fix replacement leaving empty new line $content = preg_replace('#<!--.-->(?:\r\n?\|\n?)#sU', '', $this->content); preg_match_all('#<script([^>])>(.)</script>(?:\r\n?\|\n?)#isU', $content, $matches, PREG_SET_ORDER); foreach ($matches as $match) { $attrs = empty($match[1]) ? array() : Utility::parse_attr($match[1]); if (isset($attrs['data-optimized'])) { continue; } if (!empty($attrs['data-no-optimize'])) { continue; } if (!empty($attrs['data-cfasync']) && $attrs['data-cfasync'] === 'false') { continue; } if (!empty($attrs['type']) && $attrs['type'] != 'text/javascript') { continue; } // to avoid multiple replacement if (in_array($match[0], $html_list)) { continue; } $this_src_arr = array(); // JS files if (!empty($attrs['src'])) { // Exclude check $js_excluded = Utility::str_hit_array($attrs['src'], $excludes); $is_internal = Utility::is_internal_file($attrs['src']); $is_file = substr($attrs['src'], 0, 5) != 'data:'; $ext_excluded = !$combine_ext_inl && !$is_internal; if ($js_excluded \|\| $ext_excluded \|\| !$is_file) { // Maybe defer if ($this->cfg_js_defer) { $deferred = $this->_js_defer($match[0], $attrs['src']); if ($deferred) { $this->content = str_replace($match[0], $deferred, $this->content); } } Debug2::debug2('[Optm] _parse_js bypassed due to ' . ($js_excluded ? 'js files excluded [hit] ' . $js_excluded : 'external js')); continue; } if (strpos($attrs['src'], '/localres/') !== false) { continue; } if (strpos($attrs['src'], 'instant_click') !== false) { continue; } $this_src_arr['src'] = $attrs['src']; } // Inline JS elseif (!empty($match[2])) { // Debug2::debug( '🌹🌹🌹 ' . $match[2] . '🌹' ); // Exclude check $js_excluded = Utility::str_hit_array($match[2], $excludes); if ($js_excluded \|\| !$combine_ext_inl) { // Maybe defer if ($this->cfg_js_defer) { $deferred = $this->_js_inline_defer($match[2], $match[1]); if ($deferred) { $this->content = str_replace($match[0], $deferred, $this->content); } } Debug2::debug2('[Optm] _parse_js bypassed due to ' . ($js_excluded ? 'js excluded [hit] ' . $js_excluded : 'inline js')); continue; } $this_src_arr['inl'] = true; $this_src_arr['src'] = $match[2]; if ($match[1]) { $this_src_arr['attrs'] = $match[1]; } } else { // Compatibility to those who changed src to data-src already Debug2::debug2('[Optm] No JS src or inline JS content'); continue; } $src_list[] = $this_src_arr; $html_list[] = $match[0]; } return array( $src_list, $html_list ); } /** * Inline JS defer * * @since 3.0 * @access private / private function _js_inline_defer( $con, $attrs = false, $minified = false ) { if (strpos($attrs, 'data-no-defer') !== false) { Debug2::debug2('[Optm] bypass: attr api data-no-defer'); return false; } $hit = Utility::str_hit_array($con, $this->cfg_js_defer_exc); if ($hit) { Debug2::debug2('[Optm] inline js defer excluded [setting] ' . $hit); return false; } $con = trim($con); // Minify JS first if (!$minified) { // && $this->cfg_js_defer !== 2 $con = Optimizer::minify_js($con); } if (!$con) { return false; } // Check if the content contains ESI nonce or not $con = $this->_preserve_esi($con); if ($this->cfg_js_defer === 2) { // Drop type attribute from $attrs if (strpos($attrs, ' type=') !== false) { $attrs = preg_replace('# type=([\'"])([^\1]+)\1#isU', '', $attrs); } // Replace DOMContentLoaded $con = str_replace('DOMContentLoaded', 'DOMContentLiteSpeedLoaded', $con); return '<script' . $attrs . ' type="litespeed/javascript">' . $con . '</script>'; // return '<script' . $attrs . ' type="litespeed/javascript" src="data:text/javascript;base64,' . base64_encode( $con ) . '"></script>'; // return '<script' . $attrs . ' type="litespeed/javascript">' . $con . '</script>'; } return '<script' . $attrs . ' src="data:text/javascript;base64,' . base64_encode($con) . '" defer></script>'; } /* * Replace ESI to JS inline var (mainly used to avoid nonce timeout) * * @since 3.5.1 / private function _preserve_esi( $con ) { $esi_placeholder_list = $this->cls('ESI')->contain_preserve_esi($con); if (!$esi_placeholder_list) { return $con; } foreach ($esi_placeholder_list as $esi_placeholder) { $js_var = '__litespeed_var_' . self::$_var_i++ . '__'; $con = str_replace($esi_placeholder, $js_var, $con); $this->_var_preserve_js[] = $js_var . '=' . $esi_placeholder; } return $con; } /* * Parse css src and remove to-be-removed css * * @since 1.2.2 * @access private * @return array All the src & related raw html list / private function _parse_css() { $excludes = apply_filters('litespeed_optimize_css_excludes', $this->conf(self::O_OPTM_CSS_EXC)); $ucss_file_exc_inline = apply_filters('litespeed_optimize_ucss_file_exc_inline', $this->conf(self::O_OPTM_UCSS_FILE_EXC_INLINE)); $combine_ext_inl = $this->conf(self::O_OPTM_CSS_COMB_EXT_INL); if (!apply_filters('litespeed_optm_css_comb_ext_inl', true)) { Debug2::debug2('[Optm] css_comb_ext_inl bypassed via litespeed_optm_css_comb_ext_inl filter'); $combine_ext_inl = false; } $css_to_be_removed = apply_filters('litespeed_optm_css_to_be_removed', array()); $src_list = array(); $html_list = array(); // $dom = new \PHPHtmlParser\Dom; // $dom->load( $content );return $val; // $items = $dom->find( 'link' ); // V7 added: (?:\r\n?\|\n?) to fix replacement leaving empty new line $content = preg_replace( array( '#<!--.-->(?:\r\n?\|\n?)#sU', '#<script([^>])>.</script>(?:\r\n?\|\n?)#isU', '#<noscript([^>])>.</noscript>(?:\r\n?\|\n?)#isU' ), '', $this->content ); preg_match_all('#<link ([^>]+)/?>\|<style([^>])>([^<]+)</style>(?:\r\n?\|\n?)#isU', $content, $matches, PREG_SET_ORDER); foreach ($matches as $match) { // to avoid multiple replacement if (in_array($match[0], $html_list)) { continue; } if ($exclude = Utility::str_hit_array($match[0], $excludes)) { Debug2::debug2('[Optm] _parse_css bypassed exclude ' . $exclude); continue; } $this_src_arr = array(); if (strpos($match[0], '<link') === 0) { $attrs = Utility::parse_attr($match[1]); if (empty($attrs['rel']) \|\| $attrs['rel'] !== 'stylesheet') { continue; } if (empty($attrs['href'])) { continue; } // Check if need to remove this css if (Utility::str_hit_array($attrs['href'], $css_to_be_removed)) { Debug2::debug('[Optm] rm css snippet ' . $attrs['href']); // Delete this css snippet from orig html $this->content = str_replace($match[0], '', $this->content); continue; } // Check if need to inline this css file if ($this->conf(self::O_OPTM_UCSS) && Utility::str_hit_array($attrs['href'], $ucss_file_exc_inline)) { Debug2::debug('[Optm] ucss_file_exc_inline hit ' . $attrs['href']); // Replace this css to inline from orig html $inline_script = '<style>' . $this->__optimizer->load_file($attrs['href']) . '</style>'; $this->content = str_replace($match[0], $inline_script, $this->content); continue; } // Check Google fonts hit if (strpos($attrs['href'], 'fonts.googleapis.com') !== false) { /* * For async gg fonts, will add webfont into head, hence remove it from buffer and store the matches to use later * * @since 2.7.3 * @since 3.0 For font display optm, need to parse google fonts URL too / if (!in_array($attrs['href'], $this->_ggfonts_urls)) { $this->_ggfonts_urls[] = $attrs['href']; } if ($this->cfg_ggfonts_rm \|\| $this->cfg_ggfonts_async) { Debug2::debug('[Optm] rm css snippet [Google fonts] ' . $attrs['href']); $this->content = str_replace($match[0], '', $this->content); continue; } } if (isset($attrs['data-optimized'])) { // $this_src_arr[ 'exc' ] = true; continue; } elseif (!empty($attrs['data-no-optimize'])) { // $this_src_arr[ 'exc' ] = true; continue; } $is_internal = Utility::is_internal_file($attrs['href']); $ext_excluded = !$combine_ext_inl && !$is_internal; if ($ext_excluded) { Debug2::debug2('[Optm] Bypassed due to external link'); // Maybe defer if ($this->cfg_css_async) { $snippet = $this->_async_css($match[0]); if ($snippet != $match[0]) { $this->content = str_replace($match[0], $snippet, $this->content); } } continue; } if (!empty($attrs['media']) && $attrs['media'] !== 'all') { $this_src_arr['media'] = $attrs['media']; } $this_src_arr['src'] = $attrs['href']; } else { // Inline style if (!$combine_ext_inl) { Debug2::debug2('[Optm] Bypassed due to inline'); continue; } $attrs = Utility::parse_attr($match[2]); if (!empty($attrs['data-no-optimize'])) { continue; } if (!empty($attrs['media']) && $attrs['media'] !== 'all') { $this_src_arr['media'] = $attrs['media']; } $this_src_arr['inl'] = true; $this_src_arr['src'] = $match[3]; } $src_list[] = $this_src_arr; $html_list[] = $match[0]; } return array( $src_list, $html_list ); } /* * Replace css to async loaded css * * @since 1.3 * @access private / private function _async_css_list( $html_list, $src_list ) { foreach ($html_list as $k => $ori) { if (!empty($src_list[$k]['inl'])) { continue; } $html_list[$k] = $this->_async_css($ori); } return $html_list; } /* * Async CSS snippet * * @since 3.5 / private function _async_css( $ori ) { if (strpos($ori, 'data-asynced') !== false) { Debug2::debug2('[Optm] bypass: attr data-asynced exist'); return $ori; } if (strpos($ori, 'data-no-async') !== false) { Debug2::debug2('[Optm] bypass: attr api data-no-async'); return $ori; } // async replacement $v = str_replace('stylesheet', 'preload', $ori); $v = str_replace('<link', '<link data-asynced="1" as="style" onload="this.onload=null;this.rel=\'stylesheet\'" ', $v); // Append to noscript content if (!defined('LITESPEED_GUEST_OPTM') && !$this->conf(self::O_OPTM_NOSCRIPT_RM)) { $v .= '<noscript>' . preg_replace('/ id=\'[\w-]+\' /U', ' ', $ori) . '</noscript>'; } return $v; } /* * Defer JS snippet * * @since 3.5 / private function _js_defer( $ori, $src ) { if (strpos($ori, ' async') !== false) { $ori = preg_replace('# async(?:=([\'"])(?:[^\1]+)\1)?#isU', '', $ori); } if (strpos($ori, 'defer') !== false) { return false; } if (strpos($ori, 'data-deferred') !== false) { Debug2::debug2('[Optm] bypass: attr data-deferred exist'); return false; } if (strpos($ori, 'data-no-defer') !== false) { Debug2::debug2('[Optm] bypass: attr api data-no-defer'); return false; } /* * Exclude JS from setting * * @since 1.5 / if (Utility::str_hit_array($src, $this->cfg_js_defer_exc)) { Debug2::debug('[Optm] js defer exclude ' . $src); return false; } if ($this->cfg_js_defer === 2 \|\| Utility::str_hit_array($src, $this->cfg_js_delay_inc)) { if (strpos($ori, ' type=') !== false) { $ori = preg_replace('# type=([\'"])([^\1]+)\1#isU', '', $ori); } return str_replace(' src=', ' type="litespeed/javascript" data-src=', $ori); } return str_replace('></script>', ' defer data-deferred="1"></script>', $ori); } /* * Delay JS for included setting * * @since 5.6 */ private function _js_delay( $ori, $src ) { if (strpos($ori, ' async') !== false) { $ori = str_replace(' async', '', $ori); } if (strpos($ori, 'defer') !== false) { return false; } if (strpos($ori, 'data-deferred') !== false) { Debug2::debug2('[Optm] bypass: attr data-deferred exist'); return false; } if (strpos($ori, 'data-no-defer') !== false) { Debug2::debug2('[Optm] bypass: attr api data-no-defer'); return false; } if (!Utility::str_hit_array($src, $this->cfg_js_delay_inc)) { return; } if (strpos($ori, ' type=') !== false) { $ori = preg_replace('# type=([\'"])([^\1]+)\1#isU', '', $ori); } return str_replace(' src=', ' type="litespeed/javascript" data-src=', $ori); } } Back

Edit File : optimize.cls.php | Size : 37.19 KB

<?php

/**
 * The optimize class.
 *
 * @since       1.2.2
 */

namespace LiteSpeed;

defined('WPINC') || exit();

class Optimize extends Base {

const LIB_FILE_CSS_ASYNC     = 'assets/js/css_async.min.js';
	const LIB_FILE_WEBFONTLOADER = 'assets/js/webfontloader.min.js';
	const LIB_FILE_JS_DELAY      = 'assets/js/js_delay.min.js';

const ITEM_TIMESTAMP_PURGE_CSS = 'timestamp_purge_css';

private $content;
	private $content_ori;

private $cfg_css_min;
	private $cfg_css_comb;
	private $cfg_js_min;
	private $cfg_js_comb;
	private $cfg_css_async;
	private $cfg_js_delay_inc = array();
	private $cfg_js_defer;
	private $cfg_js_defer_exc = false;
	private $cfg_ggfonts_async;
	private $_conf_css_font_display;
	private $cfg_ggfonts_rm;

private $dns_prefetch;
	private $dns_preconnect;
	private $_ggfonts_urls = array();
	private $_ccss;
	private $_ucss = false;

private $__optimizer;

private $html_foot = ''; // The html info append to <body>
	private $html_head = ''; // The html info prepend to <body>

private static $_var_i    = 0;
	private $_var_preserve_js = array();
	private $_request_url;

/**
	 * Constructor
	 *
	 * @since  4.0
	 */
	public function __construct() {
		Debug2::debug('[Optm] init');
		$this->__optimizer = $this->cls('Optimizer');
	}

/**
	 * Init optimizer
	 *
	 * @since  3.0
	 * @access protected
	 */
	public function init() {
		$this->cfg_css_async = defined('LITESPEED_GUEST_OPTM') || $this->conf(self::O_OPTM_CSS_ASYNC);
		if ($this->cfg_css_async) {
			if (!$this->cls('Cloud')->activated()) {
				Debug2::debug('[Optm] ❌ CCSS set to OFF due to QC not activated');
				$this->cfg_css_async = false;
			}
			if ((defined('LITESPEED_GUEST_OPTM') || ($this->conf(self::O_OPTM_UCSS) && $this->conf(self::O_OPTM_CSS_COMB))) && $this->conf(self::O_OPTM_UCSS_INLINE)) {
				Debug2::debug('[Optm] ⚠️ CCSS set to OFF due to UCSS Inline');
				$this->cfg_css_async = false;
			}
		}
		$this->cfg_js_defer = $this->conf(self::O_OPTM_JS_DEFER);
		if (defined('LITESPEED_GUEST_OPTM')) {
			$this->cfg_js_defer = 2;
		}
		if ($this->cfg_js_defer == 2) {
			add_filter(
				'litespeed_optm_cssjs',
				function ( $con, $file_type ) {
					if ($file_type == 'js') {
						$con = str_replace('DOMContentLoaded', 'DOMContentLiteSpeedLoaded', $con);
						// $con = str_replace( 'addEventListener("load"', 'addEventListener("litespeedLoad"', $con );
					}
					return $con;
				},
				20,
				2
			);
		}

// To remove emoji from WP
		if ($this->conf(self::O_OPTM_EMOJI_RM)) {
			$this->_emoji_rm();
		}

if ($this->conf(self::O_OPTM_QS_RM)) {
			add_filter('style_loader_src', array( $this, 'remove_query_strings' ), 999);
			add_filter('script_loader_src', array( $this, 'remove_query_strings' ), 999);
		}

// GM JS exclude @since 4.1
		if (defined('LITESPEED_GUEST_OPTM')) {
			$this->cfg_js_defer_exc = apply_filters('litespeed_optm_gm_js_exc', $this->conf(self::O_OPTM_GM_JS_EXC));
		} else {
			/**
			 * Exclude js from deferred setting
			 *
			 * @since 1.5
			 */
			if ($this->cfg_js_defer) {
				add_filter('litespeed_optm_js_defer_exc', array( $this->cls('Data'), 'load_js_defer_exc' ));
				$this->cfg_js_defer_exc = apply_filters('litespeed_optm_js_defer_exc', $this->conf(self::O_OPTM_JS_DEFER_EXC));

$this->cfg_js_delay_inc = apply_filters('litespeed_optm_js_delay_inc', $this->conf(self::O_OPTM_JS_DELAY_INC));
			}
		}

/**
		 * Add vary filter for Role Excludes
		 *
		 * @since  1.6
		 */
		add_filter('litespeed_vary', array( $this, 'vary_add_role_exclude' ));

/**
		 * Prefetch DNS
		 *
		 * @since 1.7.1
		 */
		$this->_dns_prefetch_init();

/**
		 * Preconnect
		 *
		 * @since 5.6.1
		 */
		$this->_dns_preconnect_init();

add_filter('litespeed_buffer_finalize', array( $this, 'finalize' ), 20);
	}

/**
	 * Exclude role from optimization filter
	 *
	 * @since  1.6
	 * @access public
	 */
	public function vary_add_role_exclude( $vary ) {
		if ($this->cls('Conf')->in_optm_exc_roles()) {
			$vary['role_exclude_optm'] = 1;
		}

return $vary;
	}

/**
	 * Remove emoji from WP
	 *
	 * @since  1.4
	 * @since  2.9.8 Changed to private
	 * @access private
	 */
	private function _emoji_rm() {
		remove_action('wp_head', 'print_emoji_detection_script', 7);
		remove_action('admin_print_scripts', 'print_emoji_detection_script');
		remove_filter('the_content_feed', 'wp_staticize_emoji');
		remove_filter('comment_text_rss', 'wp_staticize_emoji');
		/**
		 * Added for better result
		 *
		 * @since  1.6.2.1
		 */
		remove_action('wp_print_styles', 'print_emoji_styles');
		remove_action('admin_print_styles', 'print_emoji_styles');
		remove_filter('wp_mail', 'wp_staticize_emoji_for_email');
	}

/**
	 * Delete file-based cache folder
	 *
	 * @since  2.1
	 * @access public
	 */
	public function rm_cache_folder( $subsite_id = false ) {
		if ($subsite_id) {
			file_exists(LITESPEED_STATIC_DIR . '/css/' . $subsite_id) && File::rrmdir(LITESPEED_STATIC_DIR . '/css/' . $subsite_id);
			file_exists(LITESPEED_STATIC_DIR . '/js/' . $subsite_id) && File::rrmdir(LITESPEED_STATIC_DIR . '/js/' . $subsite_id);
			return;
		}

file_exists(LITESPEED_STATIC_DIR . '/css') && File::rrmdir(LITESPEED_STATIC_DIR . '/css');
		file_exists(LITESPEED_STATIC_DIR . '/js') && File::rrmdir(LITESPEED_STATIC_DIR . '/js');
	}

/**
	 * Remove QS
	 *
	 * @since  1.3
	 * @access public
	 */
	public function remove_query_strings( $src ) {
		if (strpos($src, '_litespeed_rm_qs=0') || strpos($src, '/recaptcha')) {
			return $src;
		}

if (!Utility::is_internal_file($src)) {
			return $src;
		}

if (strpos($src, '.js?') !== false || strpos($src, '.css?') !== false) {
			$src = preg_replace('/\?.*/', '', $src);
		}

return $src;
	}

/**
	 * Run optimize process
	 * NOTE: As this is after cache finalized, can NOT set any cache control anymore
	 *
	 * @since  1.2.2
	 * @access public
	 * @return  string The content that is after optimization
	 */
	public function finalize( $content ) {
		if (defined('LITESPEED_NO_PAGEOPTM')) {
			Debug2::debug2('[Optm] bypass: NO_PAGEOPTM const');
			return $content;
		}

if (!defined('LITESPEED_IS_HTML')) {
			Debug2::debug('[Optm] bypass: Not frontend HTML type');
			return $content;
		}

if (!defined('LITESPEED_GUEST_OPTM')) {
			if (!Control::is_cacheable()) {
				Debug2::debug('[Optm] bypass: Not cacheable');
				return $content;
			}

// Check if hit URI excludes
			add_filter('litespeed_optm_uri_exc', array( $this->cls('Data'), 'load_optm_uri_exc' ));
			$excludes = apply_filters('litespeed_optm_uri_exc', $this->conf(self::O_OPTM_EXC));
			$result   = Utility::str_hit_array($_SERVER['REQUEST_URI'], $excludes);
			if ($result) {
				Debug2::debug('[Optm] bypass: hit URI Excludes setting: ' . $result);
				return $content;
			}
		}

Debug2::debug('[Optm] start');

$this->content_ori = $this->content = $content;

$this->_optimize();
		return $this->content;
	}

/**
	 * Optimize css src
	 *
	 * @since  1.2.2
	 * @access private
	 */
	private function _optimize() {
		global $wp;
		$this->_request_url = get_permalink();
		// Backup, in case get_permalink() fails.
		if (!$this->_request_url) {
			$this->_request_url = home_url($wp->request);
		}

$this->cfg_css_min            = defined('LITESPEED_GUEST_OPTM') || $this->conf(self::O_OPTM_CSS_MIN);
		$this->cfg_css_comb           = defined('LITESPEED_GUEST_OPTM') || $this->conf(self::O_OPTM_CSS_COMB);
		$this->cfg_js_min             = defined('LITESPEED_GUEST_OPTM') || $this->conf(self::O_OPTM_JS_MIN);
		$this->cfg_js_comb            = defined('LITESPEED_GUEST_OPTM') || $this->conf(self::O_OPTM_JS_COMB);
		$this->cfg_ggfonts_rm         = defined('LITESPEED_GUEST_OPTM') || $this->conf(self::O_OPTM_GGFONTS_RM);
		$this->cfg_ggfonts_async      = !defined('LITESPEED_GUEST_OPTM') && $this->conf(self::O_OPTM_GGFONTS_ASYNC); // forced rm already
		$this->_conf_css_font_display = !defined('LITESPEED_GUEST_OPTM') && $this->conf(self::O_OPTM_CSS_FONT_DISPLAY);

if (!$this->cls('Router')->can_optm()) {
			Debug2::debug('[Optm] bypass: admin/feed/preview');
			return;
		}

if ($this->cfg_css_async) {
			$this->_ccss = $this->cls('CSS')->prepare_ccss();
			if (!$this->_ccss) {
				Debug2::debug('[Optm] ❌ CCSS set to OFF due to CCSS not generated yet');
				$this->cfg_css_async = false;
			} elseif (strpos($this->_ccss, '<style id="litespeed-ccss" data-error') === 0) {
				Debug2::debug('[Optm] ❌ CCSS set to OFF due to CCSS failed to generate');
				$this->cfg_css_async = false;
			}
		}

do_action('litespeed_optm');

// Parse css from content
		$src_list = false;
		if ($this->cfg_css_min || $this->cfg_css_comb || $this->cfg_ggfonts_rm || $this->cfg_css_async || $this->cfg_ggfonts_async || $this->_conf_css_font_display) {
			add_filter('litespeed_optimize_css_excludes', array( $this->cls('Data'), 'load_css_exc' ));
			list($src_list, $html_list) = $this->_parse_css();
		}

// css optimizer
		if ($this->cfg_css_min || $this->cfg_css_comb) {
			if ($src_list) {
				// IF combine
				if ($this->cfg_css_comb) {
					// Check if has inline UCSS enabled or not
					if ((defined('LITESPEED_GUEST_OPTM') || $this->conf(self::O_OPTM_UCSS)) && $this->conf(self::O_OPTM_UCSS_INLINE)) {
						$filename = $this->cls('UCSS')->load($this->_request_url, true);
						if ($filename) {
							$filepath_prefix = $this->_build_filepath_prefix('ucss');
							$this->_ucss     = File::read(LITESPEED_STATIC_DIR . $filepath_prefix . $filename);

// Drop all css
							$this->content = str_replace($html_list, '', $this->content);
						}
					}

if (!$this->_ucss) {
						$url = $this->_build_hash_url($src_list);

if ($url) {
							// Handle css async load
							if ($this->cfg_css_async) {
								$this->html_head .=
									'<link rel="preload" data-asynced="1" data-optimized="2" as="style" onload="this.onload=null;this.rel=\'stylesheet\'" href="' .
									Str::trim_quotes($url) .
									'" />'; // todo: How to use " in attr wrapper "
							} else {
								$this->html_head .= '<link data-optimized="2" rel="stylesheet" href="' . Str::trim_quotes($url) . '" />'; // use 2 as combined
							}

// Move all css to top
							$this->content = str_replace($html_list, '', $this->content);
						}
					}
				}
				// Only minify
				elseif ($this->cfg_css_min) {
					// will handle async css load inside
					$this->_src_queue_handler($src_list, $html_list);
				}
				// Only HTTP2 push
				else {
					foreach ($src_list as $src_info) {
						if (!empty($src_info['inl'])) {
							continue;
						}
					}
				}
			}
		}

// Handle css lazy load if not handled async loaded yet
		if ($this->cfg_css_async && !$this->cfg_css_min && !$this->cfg_css_comb) {
			// async html
			$html_list_async = $this->_async_css_list($html_list, $src_list);

// Replace async css
			$this->content = str_replace($html_list, $html_list_async, $this->content);
		}

// Parse js from buffer as needed
		$src_list = false;
		if ($this->cfg_js_min || $this->cfg_js_comb || $this->cfg_js_defer || $this->cfg_js_delay_inc) {
			add_filter('litespeed_optimize_js_excludes', array( $this->cls('Data'), 'load_js_exc' ));
			list($src_list, $html_list) = $this->_parse_js();
		}

// js optimizer
		if ($src_list) {
			// IF combine
			if ($this->cfg_js_comb) {
				$url = $this->_build_hash_url($src_list, 'js');
				if ($url) {
					$this->html_foot .= $this->_build_js_tag($url);

// Will move all JS to bottom combined one
					$this->content = str_replace($html_list, '', $this->content);
				}
			}
			// Only minify
			elseif ($this->cfg_js_min) {
				// Will handle js defer inside
				$this->_src_queue_handler($src_list, $html_list, 'js');
			}
			// Only HTTP2 push and Defer
			else {
				foreach ($src_list as $k => $src_info) {
					// Inline JS
					if (!empty($src_info['inl'])) {
						if ($this->cfg_js_defer) {
							$attrs    = !empty($src_info['attrs']) ? $src_info['attrs'] : '';
							$deferred = $this->_js_inline_defer($src_info['src'], $attrs);
							if ($deferred) {
								$this->content = str_replace($html_list[$k], $deferred, $this->content);
							}
						}
					}
					// JS files
					elseif ($this->cfg_js_defer) {
						$deferred = $this->_js_defer($html_list[$k], $src_info['src']);
						if ($deferred) {
							$this->content = str_replace($html_list[$k], $deferred, $this->content);
						}
					} elseif ($this->cfg_js_delay_inc) {
						$deferred = $this->_js_delay($html_list[$k], $src_info['src']);
						if ($deferred) {
							$this->content = str_replace($html_list[$k], $deferred, $this->content);
						}
					}
				}
			}
		}

// Append JS inline var for preserved ESI
		// Shouldn't give any optm (defer/delay) @since 4.4
		if ($this->_var_preserve_js) {
			$this->html_head .= '<script>var ' . implode(',', $this->_var_preserve_js) . ';</script>';
			Debug2::debug2('[Optm] Inline JS defer vars', $this->_var_preserve_js);
		}

// Append async compatibility lib to head
		if ($this->cfg_css_async) {
			// Inline css async lib
			if ($this->conf(self::O_OPTM_CSS_ASYNC_INLINE)) {
				$this->html_head .= $this->_build_js_inline(File::read(LSCWP_DIR . self::LIB_FILE_CSS_ASYNC), true);
			} else {
				$css_async_lib_url = LSWCP_PLUGIN_URL . self::LIB_FILE_CSS_ASYNC;
				$this->html_head  .= $this->_build_js_tag($css_async_lib_url, 'litespeed-css-async-lib'); // Don't exclude it from defer for now
			}
		}

/**
		 * Handle google fonts async
		 * This will result in a JS snippet in head, so need to put it in the end to avoid being replaced by JS parser
		 */
		$this->_async_ggfonts();

/**
		 * Font display optm
		 *
		 * @since  3.0
		 */
		$this->_font_optm();

// Inject JS Delay lib
		$this->_maybe_js_delay();

/**
		 * HTML Lazyload
		 */
		if ($this->conf(self::O_OPTM_HTML_LAZY)) {
			$this->html_head = $this->cls('CSS')->prepare_html_lazy() . $this->html_head;
		}

// Maybe prepend inline UCSS
		if ($this->_ucss) {
			$this->html_head = '<style id="litespeed-ucss">' . $this->_ucss . '</style>' . $this->html_head;
		}

// Check if there is any critical css rules setting
		if ($this->cfg_css_async && $this->_ccss) {
			$this->html_head = $this->_ccss . $this->html_head;
		}

// Replace html head part
		$this->html_head = apply_filters('litespeed_optm_html_head', $this->html_head);
		if ($this->html_head) {
			if (apply_filters('litespeed_optm_html_after_head', false)) {
				$this->content = str_replace('</head>', $this->html_head . '</head>', $this->content);
			} else {
				// Put header content to be after charset
				if (strpos($this->content, '<meta charset') !== false) {
					$this->content = preg_replace('#<meta charset([^>]*)>#isU', '<meta charset$1>' . $this->html_head, $this->content, 1);
				} else {
					$this->content = preg_replace('#<head([^>]*)>#isU', '<head$1>' . $this->html_head, $this->content, 1);
				}
			}
		}

// Replace html foot part
		$this->html_foot = apply_filters('litespeed_optm_html_foot', $this->html_foot);
		if ($this->html_foot) {
			$this->content = str_replace('</body>', $this->html_foot . '</body>', $this->content);
		}

// Drop noscript if enabled
		if ($this->conf(self::O_OPTM_NOSCRIPT_RM)) {
			// $this->content = preg_replace( '#<noscript>.*</noscript>#isU', '', $this->content );
		}

// HTML minify
		if (defined('LITESPEED_GUEST_OPTM') || $this->conf(self::O_OPTM_HTML_MIN)) {
			$this->content = $this->__optimizer->html_min($this->content);
		}
	}

/**
	 * Build a full JS tag
	 *
	 * @since  4.0
	 */
	private function _build_js_tag( $src ) {
		if ($this->cfg_js_defer === 2 || Utility::str_hit_array($src, $this->cfg_js_delay_inc)) {
			return '<script data-optimized="1" type="litespeed/javascript" data-src="' . Str::trim_quotes($src) . '"></script>';
		}

if ($this->cfg_js_defer) {
			return '<script data-optimized="1" src="' . Str::trim_quotes($src) . '" defer></script>';
		}

return '<script data-optimized="1" src="' . Str::trim_quotes($src) . '"></script>';
	}

/**
	 * Build a full inline JS snippet
	 *
	 * @since  4.0
	 */
	private function _build_js_inline( $script, $minified = false ) {
		if ($this->cfg_js_defer) {
			$deferred = $this->_js_inline_defer($script, false, $minified);
			if ($deferred) {
				return $deferred;
			}
		}

return '<script>' . $script . '</script>';
	}

/**
	 * Load JS delay lib
	 *
	 * @since 4.0
	 */
	private function _maybe_js_delay() {
		if ($this->cfg_js_defer !== 2 && !$this->cfg_js_delay_inc) {
			return;
		}

$this->html_foot .= '<script>' . File::read(LSCWP_DIR . self::LIB_FILE_JS_DELAY) . '</script>';
	}

/**
	 * Google font async
	 *
	 * @since 2.7.3
	 * @access private
	 */
	private function _async_ggfonts() {
		if (!$this->cfg_ggfonts_async || !$this->_ggfonts_urls) {
			return;
		}

Debug2::debug2('[Optm] google fonts async found: ', $this->_ggfonts_urls);

$html = '<link rel="preconnect" href="https://fonts.gstatic.com/" crossorigin />';

/**
		 * Append fonts
		 *
		 * Could be multiple fonts
		 *
		 *  <link rel='stylesheet' href='//fonts.googleapis.com/css?family=Open+Sans%3A400%2C600%2C700%2C800%2C300&#038;ver=4.9.8' type='text/css' media='all' />
		 *  <link rel='stylesheet' href='//fonts.googleapis.com/css?family=PT+Sans%3A400%2C700%7CPT+Sans+Narrow%3A400%7CMontserrat%3A600&#038;subset=latin&#038;ver=4.9.8' type='text/css' media='all' />
		 *      -> family: PT Sans:400,700|PT Sans Narrow:400|Montserrat:600
		 *  <link rel='stylesheet' href='https://fonts.googleapis.com/css?family=Source+Sans+Pro:400,300,300italic,400italic,600,700,900&#038;subset=latin%2Clatin-ext' />
		 */
		$script = 'WebFontConfig={google:{families:[';

$families = array();
		foreach ($this->_ggfonts_urls as $v) {
			$qs = wp_specialchars_decode($v);
			$qs = urldecode($qs);
			$qs = parse_url($qs, PHP_URL_QUERY);
			parse_str($qs, $qs);

if (empty($qs['family'])) {
				Debug2::debug('[Optm] ERR ggfonts failed to find family: ' . $v);
				continue;
			}

$subset = empty($qs['subset']) ? '' : ':' . $qs['subset'];

foreach (array_filter(explode('|', $qs['family'])) as $v2) {
				$families[] = Str::trim_quotes($v2 . $subset);
			}
		}

$script .= '"' . implode('","', $families) . ($this->_conf_css_font_display ? '&display=swap' : '') . '"';

$script .= ']}};';

// if webfontloader lib was loaded before WebFontConfig variable, call WebFont.load
		$script .= 'if ( typeof WebFont === "object" && typeof WebFont.load === "function" ) { WebFont.load( WebFontConfig ); }';

$html .= $this->_build_js_inline($script);

// https://cdnjs.cloudflare.com/ajax/libs/webfont/1.6.28/webfontloader.js
		$webfont_lib_url = LSWCP_PLUGIN_URL . self::LIB_FILE_WEBFONTLOADER;

// default async, if js defer set use defer
		$html .= $this->_build_js_tag($webfont_lib_url);

// Put this in the very beginning for preconnect
		$this->html_head = $html . $this->html_head;
	}

/**
	 * Font optm
	 *
	 * @since  3.0
	 * @access private
	 */
	private function _font_optm() {
		if (!$this->_conf_css_font_display || !$this->_ggfonts_urls) {
			return;
		}

Debug2::debug2('[Optm] google fonts optm ', $this->_ggfonts_urls);

foreach ($this->_ggfonts_urls as $v) {
			if (strpos($v, 'display=')) {
				continue;
			}
			$this->html_head = str_replace($v, $v . '&#038;display=swap', $this->html_head);
			$this->html_foot = str_replace($v, $v . '&#038;display=swap', $this->html_foot);
			$this->content   = str_replace($v, $v . '&#038;display=swap', $this->content);
		}
	}

/**
	 * Prefetch DNS
	 *
	 * @since 1.7.1
	 * @access private
	 */
	private function _dns_prefetch_init() {
		// Widely enable link DNS prefetch
		if (defined('LITESPEED_GUEST_OPTM') || $this->conf(self::O_OPTM_DNS_PREFETCH_CTRL)) {
			@header('X-DNS-Prefetch-Control: on');
		}

$this->dns_prefetch = $this->conf(self::O_OPTM_DNS_PREFETCH);
		if (!$this->dns_prefetch) {
			return;
		}

if (function_exists('wp_resource_hints')) {
			add_filter('wp_resource_hints', array( $this, 'dns_prefetch_filter' ), 10, 2);
		} else {
			add_action('litespeed_optm', array( $this, 'dns_prefetch_output' ));
		}
	}

/**
	 * Preconnect init
	 *
	 * @since 5.6.1
	 */
	private function _dns_preconnect_init() {
		$this->dns_preconnect = $this->conf(self::O_OPTM_DNS_PRECONNECT);
		if ($this->dns_preconnect) {
			add_action('litespeed_optm', array( $this, 'dns_preconnect_output' ));
		}
	}

/**
	 * Prefetch DNS hook for WP
	 *
	 * @since 1.7.1
	 * @access public
	 */
	public function dns_prefetch_filter( $urls, $relation_type ) {
		if ($relation_type !== 'dns-prefetch') {
			return $urls;
		}

foreach ($this->dns_prefetch as $v) {
			if ($v) {
				$urls[] = $v;
			}
		}

return $urls;
	}

/**
	 * Prefetch DNS
	 *
	 * @since 1.7.1
	 * @access public
	 */
	public function dns_prefetch_output() {
		foreach ($this->dns_prefetch as $v) {
			if ($v) {
				$this->html_head .= '<link rel="dns-prefetch" href="' . Str::trim_quotes($v) . '" />';
			}
		}
	}

/**
	 * Preconnect
	 *
	 * @since 5.6.1
	 * @access public
	 */
	public function dns_preconnect_output() {
		foreach ($this->dns_preconnect as $v) {
			if ($v) {
				$this->html_head .= '<link rel="preconnect" href="' . Str::trim_quotes($v) . '" />';
			}
		}
	}

/**
	 * Run minify with src queue list
	 *
	 * @since  1.2.2
	 * @access private
	 */
	private function _src_queue_handler( $src_list, $html_list, $file_type = 'css' ) {
		$html_list_ori = $html_list;

$can_webp = $this->cls('Media')->webp_support();

$tag = $file_type == 'css' ? 'link' : 'script';
		foreach ($src_list as $key => $src_info) {
			// Minify inline CSS/JS
			if (!empty($src_info['inl'])) {
				if ($file_type == 'css') {
					$code = Optimizer::minify_css($src_info['src']);
					$can_webp && ($code = $this->cls('Media')->replace_background_webp($code));
					$snippet = str_replace($src_info['src'], $code, $html_list[$key]);
				} else {
					// Inline defer JS
					if ($this->cfg_js_defer) {
						$attrs   = !empty($src_info['attrs']) ? $src_info['attrs'] : '';
						$snippet = $this->_js_inline_defer($src_info['src'], $attrs) ?: $html_list[$key];
					} else {
						$code    = Optimizer::minify_js($src_info['src']);
						$snippet = str_replace($src_info['src'], $code, $html_list[$key]);
					}
				}
			}
			// CSS/JS files
			else {
				$url = $this->_build_single_hash_url($src_info['src'], $file_type);
				if ($url) {
					$snippet = str_replace($src_info['src'], $url, $html_list[$key]);
				}

// Handle css async load
				if ($file_type == 'css' && $this->cfg_css_async) {
					$snippet = $this->_async_css($snippet);
				}

// Handle js defer
				if ($file_type === 'js' && $this->cfg_js_defer) {
					$snippet = $this->_js_defer($snippet, $src_info['src']) ?: $snippet;
				}
			}

$snippet         = str_replace("<$tag ", '<' . $tag . ' data-optimized="1" ', $snippet);
			$html_list[$key] = $snippet;
		}

$this->content = str_replace($html_list_ori, $html_list, $this->content);
	}

/**
	 * Build a single URL mapped filename (This will not save in DB)
	 *
	 * @since  4.0
	 */
	private function _build_single_hash_url( $src, $file_type = 'css' ) {
		$content = $this->__optimizer->load_file($src, $file_type);

$is_min = $this->__optimizer->is_min($src);

$content = $this->__optimizer->optm_snippet($content, $file_type, !$is_min, $src);

$filepath_prefix = $this->_build_filepath_prefix($file_type);

// Save to file
		$filename    = $filepath_prefix . md5($this->remove_query_strings($src)) . '.' . $file_type;
		$static_file = LITESPEED_STATIC_DIR . $filename;
		File::save($static_file, $content, true);

// QS is required as $src may contains version info
		$qs_hash = substr(md5($src), -5);
		return LITESPEED_STATIC_URL . "$filename?ver=$qs_hash";
	}

/**
	 * Generate full URL path with hash for a list of src
	 *
	 * @since  1.2.2
	 * @access private
	 */
	private function _build_hash_url( $src_list, $file_type = 'css' ) {
		// $url_sensitive = $this->conf( self::O_OPTM_CSS_UNIQUE ) && $file_type == 'css'; // If need to keep unique CSS per URI

// Replace preserved ESI (before generating hash)
		if ($file_type == 'js') {
			foreach ($src_list as $k => $v) {
				if (empty($v['inl'])) {
					continue;
				}
				$src_list[$k]['src'] = $this->_preserve_esi($v['src']);
			}
		}

$minify        = $file_type === 'css' ? $this->cfg_css_min : $this->cfg_js_min;
		$filename_info = $this->__optimizer->serve($this->_request_url, $file_type, $minify, $src_list);

if (!$filename_info) {
			return false; // Failed to generate
		}

list($filename, $type) = $filename_info;

// Add cache tag in case later file deleted to avoid lscache served stale non-existed files @since 4.4.1
		Tag::add(Tag::TYPE_MIN . '.' . $filename);

$qs_hash = substr(md5(self::get_option(self::ITEM_TIMESTAMP_PURGE_CSS)), -5);
		// As filename is already related to filecon md5, no need QS anymore
		$filepath_prefix = $this->_build_filepath_prefix($type);
		return LITESPEED_STATIC_URL . $filepath_prefix . $filename . '?ver=' . $qs_hash;
	}

/**
	 * Parse js src
	 *
	 * @since  1.2.2
	 * @access private
	 */
	private function _parse_js() {
		$excludes = apply_filters('litespeed_optimize_js_excludes', $this->conf(self::O_OPTM_JS_EXC));

$combine_ext_inl = $this->conf(self::O_OPTM_JS_COMB_EXT_INL);
		if (!apply_filters('litespeed_optm_js_comb_ext_inl', true)) {
			Debug2::debug2('[Optm] js_comb_ext_inl bypassed via litespeed_optm_js_comb_ext_inl filter');
			$combine_ext_inl = false;
		}

$src_list  = array();
		$html_list = array();

// V7 added: (?:\r\n?|\n?) to fix replacement leaving empty new line
		$content = preg_replace('#(?:\r\n?|\n?)#sU', '', $this->content);
		preg_match_all('#<script([^>]*)>(.*)</script>(?:\r\n?|\n?)#isU', $content, $matches, PREG_SET_ORDER);
		foreach ($matches as $match) {
			$attrs = empty($match[1]) ? array() : Utility::parse_attr($match[1]);

if (isset($attrs['data-optimized'])) {
				continue;
			}
			if (!empty($attrs['data-no-optimize'])) {
				continue;
			}
			if (!empty($attrs['data-cfasync']) && $attrs['data-cfasync'] === 'false') {
				continue;
			}
			if (!empty($attrs['type']) && $attrs['type'] != 'text/javascript') {
				continue;
			}

// to avoid multiple replacement
			if (in_array($match[0], $html_list)) {
				continue;
			}

$this_src_arr = array();
			// JS files
			if (!empty($attrs['src'])) {
				// Exclude check
				$js_excluded  = Utility::str_hit_array($attrs['src'], $excludes);
				$is_internal  = Utility::is_internal_file($attrs['src']);
				$is_file      = substr($attrs['src'], 0, 5) != 'data:';
				$ext_excluded = !$combine_ext_inl && !$is_internal;
				if ($js_excluded || $ext_excluded || !$is_file) {
					// Maybe defer
					if ($this->cfg_js_defer) {
						$deferred = $this->_js_defer($match[0], $attrs['src']);
						if ($deferred) {
							$this->content = str_replace($match[0], $deferred, $this->content);
						}
					}

Debug2::debug2('[Optm] _parse_js bypassed due to ' . ($js_excluded ? 'js files excluded [hit] ' . $js_excluded : 'external js'));
					continue;
				}

if (strpos($attrs['src'], '/localres/') !== false) {
					continue;
				}

if (strpos($attrs['src'], 'instant_click') !== false) {
					continue;
				}

$this_src_arr['src'] = $attrs['src'];
			}
			// Inline JS
			elseif (!empty($match[2])) {
				// Debug2::debug( '🌹🌹🌹 ' . $match[2] . '🌹' );
				// Exclude check
				$js_excluded = Utility::str_hit_array($match[2], $excludes);
				if ($js_excluded || !$combine_ext_inl) {
					// Maybe defer
					if ($this->cfg_js_defer) {
						$deferred = $this->_js_inline_defer($match[2], $match[1]);
						if ($deferred) {
							$this->content = str_replace($match[0], $deferred, $this->content);
						}
					}
					Debug2::debug2('[Optm] _parse_js bypassed due to ' . ($js_excluded ? 'js excluded [hit] ' . $js_excluded : 'inline js'));
					continue;
				}

$this_src_arr['inl'] = true;
				$this_src_arr['src'] = $match[2];
				if ($match[1]) {
					$this_src_arr['attrs'] = $match[1];
				}
			} else {
				// Compatibility to those who changed src to data-src already
				Debug2::debug2('[Optm] No JS src or inline JS content');
				continue;
			}

$src_list[]  = $this_src_arr;
			$html_list[] = $match[0];
		}

return array( $src_list, $html_list );
	}

/**
	 * Inline JS defer
	 *
	 * @since 3.0
	 * @access private
	 */
	private function _js_inline_defer( $con, $attrs = false, $minified = false ) {
		if (strpos($attrs, 'data-no-defer') !== false) {
			Debug2::debug2('[Optm] bypass: attr api data-no-defer');
			return false;
		}

$hit = Utility::str_hit_array($con, $this->cfg_js_defer_exc);
		if ($hit) {
			Debug2::debug2('[Optm] inline js defer excluded [setting] ' . $hit);
			return false;
		}

$con = trim($con);
		// Minify JS first
		if (!$minified) {
			// && $this->cfg_js_defer !== 2
			$con = Optimizer::minify_js($con);
		}

if (!$con) {
			return false;
		}

// Check if the content contains ESI nonce or not
		$con = $this->_preserve_esi($con);

if ($this->cfg_js_defer === 2) {
			// Drop type attribute from $attrs
			if (strpos($attrs, ' type=') !== false) {
				$attrs = preg_replace('# type=([\'"])([^\1]+)\1#isU', '', $attrs);
			}
			// Replace DOMContentLoaded
			$con = str_replace('DOMContentLoaded', 'DOMContentLiteSpeedLoaded', $con);
			return '<script' . $attrs . ' type="litespeed/javascript">' . $con . '</script>';
			// return '<script' . $attrs . ' type="litespeed/javascript" src="data:text/javascript;base64,' . base64_encode( $con ) . '"></script>';
			// return '<script' . $attrs . ' type="litespeed/javascript">' . $con . '</script>';
		}

return '<script' . $attrs . ' src="data:text/javascript;base64,' . base64_encode($con) . '" defer></script>';
	}

/**
	 * Replace ESI to JS inline var (mainly used to avoid nonce timeout)
	 *
	 * @since  3.5.1
	 */
	private function _preserve_esi( $con ) {
		$esi_placeholder_list = $this->cls('ESI')->contain_preserve_esi($con);
		if (!$esi_placeholder_list) {
			return $con;
		}

foreach ($esi_placeholder_list as $esi_placeholder) {
			$js_var                   = '__litespeed_var_' . self::$_var_i++ . '__';
			$con                      = str_replace($esi_placeholder, $js_var, $con);
			$this->_var_preserve_js[] = $js_var . '=' . $esi_placeholder;
		}

return $con;
	}

/**
	 * Parse css src and remove to-be-removed css
	 *
	 * @since  1.2.2
	 * @access private
	 * @return array  All the src & related raw html list
	 */
	private function _parse_css() {
		$excludes             = apply_filters('litespeed_optimize_css_excludes', $this->conf(self::O_OPTM_CSS_EXC));
		$ucss_file_exc_inline = apply_filters('litespeed_optimize_ucss_file_exc_inline', $this->conf(self::O_OPTM_UCSS_FILE_EXC_INLINE));

$combine_ext_inl = $this->conf(self::O_OPTM_CSS_COMB_EXT_INL);
		if (!apply_filters('litespeed_optm_css_comb_ext_inl', true)) {
			Debug2::debug2('[Optm] css_comb_ext_inl bypassed via litespeed_optm_css_comb_ext_inl filter');
			$combine_ext_inl = false;
		}

$css_to_be_removed = apply_filters('litespeed_optm_css_to_be_removed', array());

$src_list  = array();
		$html_list = array();

// $dom = new \PHPHtmlParser\Dom;
		// $dom->load( $content );return $val;
		// $items = $dom->find( 'link' );

// V7 added: (?:\r\n?|\n?) to fix replacement leaving empty new line
		$content = preg_replace(
			array( '#(?:\r\n?|\n?)#sU', '#<script([^>]*)>.*</script>(?:\r\n?|\n?)#isU', '#<noscript([^>]*)>.*</noscript>(?:\r\n?|\n?)#isU' ),
			'',
			$this->content
		);
		preg_match_all('#<link ([^>]+)/?>|<style([^>]*)>([^<]+)</style>(?:\r\n?|\n?)#isU', $content, $matches, PREG_SET_ORDER);

foreach ($matches as $match) {
			// to avoid multiple replacement
			if (in_array($match[0], $html_list)) {
				continue;
			}

if ($exclude = Utility::str_hit_array($match[0], $excludes)) {
				Debug2::debug2('[Optm] _parse_css bypassed exclude ' . $exclude);
				continue;
			}

$this_src_arr = array();
			if (strpos($match[0], '<link') === 0) {
				$attrs = Utility::parse_attr($match[1]);
				if (empty($attrs['rel']) || $attrs['rel'] !== 'stylesheet') {
					continue;
				}
				if (empty($attrs['href'])) {
					continue;
				}

// Check if need to remove this css
				if (Utility::str_hit_array($attrs['href'], $css_to_be_removed)) {
					Debug2::debug('[Optm] rm css snippet ' . $attrs['href']);
					// Delete this css snippet from orig html
					$this->content = str_replace($match[0], '', $this->content);

continue;
				}

// Check if need to inline this css file
				if ($this->conf(self::O_OPTM_UCSS) && Utility::str_hit_array($attrs['href'], $ucss_file_exc_inline)) {
					Debug2::debug('[Optm] ucss_file_exc_inline hit ' . $attrs['href']);
					// Replace this css to inline from orig html
					$inline_script = '<style>' . $this->__optimizer->load_file($attrs['href']) . '</style>';
					$this->content = str_replace($match[0], $inline_script, $this->content);

continue;
				}

// Check Google fonts hit
				if (strpos($attrs['href'], 'fonts.googleapis.com') !== false) {
					/**
					 * For async gg fonts, will add webfont into head, hence remove it from buffer and store the matches to use later
					 *
					 * @since  2.7.3
					 * @since  3.0 For font display optm, need to parse google fonts URL too
					 */
					if (!in_array($attrs['href'], $this->_ggfonts_urls)) {
						$this->_ggfonts_urls[] = $attrs['href'];
					}

if ($this->cfg_ggfonts_rm || $this->cfg_ggfonts_async) {
						Debug2::debug('[Optm] rm css snippet [Google fonts] ' . $attrs['href']);
						$this->content = str_replace($match[0], '', $this->content);

continue;
					}
				}

if (isset($attrs['data-optimized'])) {
					// $this_src_arr[ 'exc' ] = true;
					continue;
				} elseif (!empty($attrs['data-no-optimize'])) {
					// $this_src_arr[ 'exc' ] = true;
					continue;
				}

$is_internal  = Utility::is_internal_file($attrs['href']);
				$ext_excluded = !$combine_ext_inl && !$is_internal;
				if ($ext_excluded) {
					Debug2::debug2('[Optm] Bypassed due to external link');
					// Maybe defer
					if ($this->cfg_css_async) {
						$snippet = $this->_async_css($match[0]);
						if ($snippet != $match[0]) {
							$this->content = str_replace($match[0], $snippet, $this->content);
						}
					}

continue;
				}

if (!empty($attrs['media']) && $attrs['media'] !== 'all') {
					$this_src_arr['media'] = $attrs['media'];
				}

$this_src_arr['src'] = $attrs['href'];
			} else {
				// Inline style
				if (!$combine_ext_inl) {
					Debug2::debug2('[Optm] Bypassed due to inline');
					continue;
				}

$attrs = Utility::parse_attr($match[2]);

if (!empty($attrs['data-no-optimize'])) {
					continue;
				}

if (!empty($attrs['media']) && $attrs['media'] !== 'all') {
					$this_src_arr['media'] = $attrs['media'];
				}

$this_src_arr['inl'] = true;
				$this_src_arr['src'] = $match[3];
			}

$src_list[] = $this_src_arr;

$html_list[] = $match[0];
		}

return array( $src_list, $html_list );
	}

/**
	 * Replace css to async loaded css
	 *
	 * @since  1.3
	 * @access private
	 */
	private function _async_css_list( $html_list, $src_list ) {
		foreach ($html_list as $k => $ori) {
			if (!empty($src_list[$k]['inl'])) {
				continue;
			}

$html_list[$k] = $this->_async_css($ori);
		}
		return $html_list;
	}

/**
	 * Async CSS snippet
	 *
	 * @since 3.5
	 */
	private function _async_css( $ori ) {
		if (strpos($ori, 'data-asynced') !== false) {
			Debug2::debug2('[Optm] bypass: attr data-asynced exist');
			return $ori;
		}

if (strpos($ori, 'data-no-async') !== false) {
			Debug2::debug2('[Optm] bypass: attr api data-no-async');
			return $ori;
		}

// async replacement
		$v = str_replace('stylesheet', 'preload', $ori);
		$v = str_replace('<link', '<link data-asynced="1" as="style" onload="this.onload=null;this.rel=\'stylesheet\'" ', $v);
		// Append to noscript content
		if (!defined('LITESPEED_GUEST_OPTM') && !$this->conf(self::O_OPTM_NOSCRIPT_RM)) {
			$v .= '<noscript>' . preg_replace('/ id=\'[\w-]+\' /U', ' ', $ori) . '</noscript>';
		}

return $v;
	}

/**
	 * Defer JS snippet
	 *
	 * @since  3.5
	 */
	private function _js_defer( $ori, $src ) {
		if (strpos($ori, ' async') !== false) {
			$ori = preg_replace('# async(?:=([\'"])(?:[^\1]+)\1)?#isU', '', $ori);
		}

if (strpos($ori, 'defer') !== false) {
			return false;
		}
		if (strpos($ori, 'data-deferred') !== false) {
			Debug2::debug2('[Optm] bypass: attr data-deferred exist');
			return false;
		}
		if (strpos($ori, 'data-no-defer') !== false) {
			Debug2::debug2('[Optm] bypass: attr api data-no-defer');
			return false;
		}

/**
		 * Exclude JS from setting
		 *
		 * @since 1.5
		 */
		if (Utility::str_hit_array($src, $this->cfg_js_defer_exc)) {
			Debug2::debug('[Optm] js defer exclude ' . $src);
			return false;
		}

if ($this->cfg_js_defer === 2 || Utility::str_hit_array($src, $this->cfg_js_delay_inc)) {
			if (strpos($ori, ' type=') !== false) {
				$ori = preg_replace('# type=([\'"])([^\1]+)\1#isU', '', $ori);
			}
			return str_replace(' src=', ' type="litespeed/javascript" data-src=', $ori);
		}

return str_replace('></script>', ' defer data-deferred="1"></script>', $ori);
	}

/**
	 * Delay JS for included setting
	 *
	 * @since 5.6
	 */
	private function _js_delay( $ori, $src ) {
		if (strpos($ori, ' async') !== false) {
			$ori = str_replace(' async', '', $ori);
		}

if (!Utility::str_hit_array($src, $this->cfg_js_delay_inc)) {
			return;
		}

if (strpos($ori, ' type=') !== false) {
			$ori = preg_replace('# type=([\'"])([^\1]+)\1#isU', '', $ori);
		}
		return str_replace(' src=', ' type="litespeed/javascript" data-src=', $ori);
	}
}

Back