JezK

Edit File: optimize.cls.php

<?php
// phpcs:ignoreFile

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

namespace LiteSpeed;

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

class Optimize extends Base {
	const LOG_TAG           = '🎢';

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';

const DUMMY_CSS_REGEX = "#<link [ \w='\"/-]*id=['\"]litespeed-cache-dummy-css['\"][ \w='\"/-]*href=['\"].+assets/css/litespeed-dummy\.css[?\w.=-]*['\"][ \w='\"/-]*>#isU";

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 append to <head>
	private $html_head_early = ''; // The html info prepend to top of head

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

/**
	 * Constructor
	 *
	 * @since  4.0
	 */
	public function __construct() {
		self::debug('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()) {
				self::debug('❌ 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)) {
				self::debug('⚠️ 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' ));

// DNS optm (Prefetch/Preconnect) @since 7.3
		$this->_dns_optm_init();

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

// Inject a dummy CSS file to control final optimized data location in <head>
		wp_enqueue_style(Core::PLUGIN_NAME . '-dummy', LSWCP_PLUGIN_URL . 'assets/css/litespeed-dummy.css');
	}

/**
	 * 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 ) {
		$content = $this->_finalize($content);
		// Fallback to replace dummy css placeholder
		if (1 === preg_match(self::DUMMY_CSS_REGEX, $content)) {
			self::debug('Fallback to drop dummy CSS');
			$content = preg_replace( self::DUMMY_CSS_REGEX, '', $content );
		}
		return $content;
	}
	private function _finalize( $content ) {
		if (defined('LITESPEED_NO_PAGEOPTM')) {
			self::debug2('bypass: NO_PAGEOPTM const');
			return $content;
		}

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

if (!defined('LITESPEED_GUEST_OPTM')) {
			if (!Control::is_cacheable()) {
				self::debug('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));
			$result   = REST::str_hit_uri($_SERVER['REQUEST_URI'], $excludes);
			if ($result) {
				self::debug('bypass: hit URI Excludes setting: ' . $result);
				return $content;
			}
		}

self::debug('start');

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

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

/**
	 * Optimize css src
	 *
	 * @since  1.2.2
	 * @access private
	 */
	private function _optimize() {
		$this->_request_url = Utility::request_url();

$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()) {
			self::debug('bypass: admin/feed/preview');
			return;
		}

if ($this->cfg_css_async) {
			$this->_ccss = $this->cls('CSS')->prepare_ccss();
			if (!$this->_ccss) {
				self::debug('❌ 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) {
				self::debug('❌ 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>';
			self::debug2('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); // 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_early = apply_filters('litespeed_optm_html_head_early', $this->html_head_early);
		if ($this->html_head_early) {
			// Put header content to be after charset
			if (false !== strpos($this->content, '<meta charset')) {
				self::debug('Put early optm data to be after <meta charset>');
				$this->content = preg_replace('#<meta charset([^>]*)>#isU', '<meta charset$1>' . $this->html_head_early, $this->content, 1);
			} else {
				self::debug('Put early optm data to be right after <head>');
				$this->content = preg_replace('#<head([^>]*)>#isU', '<head$1>' . $this->html_head_early, $this->content, 1);
			}
		}
		$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 dummy css position
				if (1 === preg_match(self::DUMMY_CSS_REGEX, $this->content)) {
					self::debug('Put optm data to dummy css location');
					$this->content = preg_replace( self::DUMMY_CSS_REGEX, $this->html_head, $this->content );
				}
				// Fallback: try to be after charset
				elseif (strpos($this->content, '<meta charset') !== false) {
					self::debug('Put optm data to be after <meta charset>');
					$this->content = preg_replace('#<meta charset([^>]*)>#isU', '<meta charset$1>' . $this->html_head, $this->content, 1);
				} else {
					self::debug('Put optm data to be after <head>');
					$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 );
		}

// Inline font-face optimize
		$this->content = $this->__optimizer->optm_font_face( $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;
		}

if (!defined('LITESPEED_JS_DELAY_LIB_LOADED')) {
			define('LITESPEED_JS_DELAY_LIB_LOADED', true);
			$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;
		}

self::debug2('google fonts async found: ', $this->_ggfonts_urls);

$this->html_head_early .= '<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'])) {
				self::debug('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);
			}
		}

if ($families && $this->_conf_css_font_display) {
			$families[count($families) - 1] .= '&display=swap';
		}

$script .= wp_json_encode($families, JSON_HEX_TAG | JSON_HEX_AMP | JSON_HEX_APOS | JSON_HEX_QUOT);
		$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;
		}

self::debug2('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 DNS prefetch
	 * @since 5.6.1 DNS preconnect
	 * @access private
	 */
	private function _dns_optm_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);
		$this->dns_preconnect = $this->conf(self::O_OPTM_DNS_PRECONNECT);
		if (!$this->dns_prefetch && !$this->dns_preconnect) {
			return;
		}

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

/**
	 * DNS optm hook for WP
	 *
	 * @since 1.7.1
	 * @access public
	 */
	public function dns_optm_filter( $urls, $relation_type ) {
		if ('dns-prefetch' === $relation_type) {
			foreach ($this->dns_prefetch as $v) {
				if ($v) {
					$urls[] = $v;
				}
			}
		}
		if ('preconnect' === $relation_type) {
			foreach ($this->dns_preconnect as $v) {
				if ($v) {
					$urls[] = $v;
				}
			}
		}

return $urls;
	}

/**
	 * DNS optm output directly
	 *
	 * @since 1.7.1 DNS prefetch
	 * @since 5.6.1 DNS preconnect
	 * @access public
	 */
	public function dns_optm_output() {
		foreach ($this->dns_prefetch as $v) {
			if ($v) {
				$this->html_head_early .= '<link rel="dns-prefetch" href="' . Str::trim_quotes($v) . '" />';
			}
		}
		foreach ($this->dns_preconnect as $v) {
			if ($v) {
				$this->html_head_early .= '<link rel="preconnect" href="' . Str::trim_quotes($v) . '" crossorigin />';
			}
		}
	}

/**
	 * 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)) {
			self::debug2('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);
						}
					}

self::debug2('_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])) {
				// self::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, $this->content);
						}
					}
					self::debug2('_parse_js bypassed due to ' . ($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
				self::debug2('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) {
			self::debug2('bypass: attr api data-no-defer');
			return false;
		}

$hit = Utility::str_hit_array($con, $this->cfg_js_defer_exc);
		if ($hit) {
			self::debug2('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
			$attrs = Utility::remove_attr( $attrs, 'type' );
			// 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));

// Append dummy css to exclude list
		$excludes[] = 'litespeed-dummy.css';

$combine_ext_inl = $this->conf(self::O_OPTM_CSS_COMB_EXT_INL);
		if (!apply_filters('litespeed_optm_css_comb_ext_inl', true)) {
			self::debug2('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)) {
				self::debug2('_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)) {
					self::debug('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)) {
					self::debug('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) {
						self::debug('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) {
					self::debug2('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) {
					self::debug2('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) {
			self::debug2('bypass: attr data-asynced exist');
			return $ori;
		}

if (strpos($ori, 'data-no-async') !== false) {
			self::debug2('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 ) {
		$ori = Utility::remove_attr( $ori, 'async' );

if (strpos($ori, 'defer') !== false) {
			return false;
		}
		if (strpos($ori, 'data-deferred') !== false) {
			self::debug2('bypass: attr data-deferred exist');
			return false;
		}
		if (strpos($ori, 'data-no-defer') !== false) {
			self::debug2('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)) {
			self::debug('js defer exclude ' . $src);
			return false;
		}

if ($this->cfg_js_defer === 2 || Utility::str_hit_array($src, $this->cfg_js_delay_inc)) {
			$ori = Utility::remove_attr( $ori, 'type' );
			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 ) {
		$ori = Utility::remove_attr( $ori, 'async' );

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

$ori = Utility::remove_attr( $ori, 'type' );
		return str_replace(' src=', ' type="litespeed/javascript" data-src=', $ori);
	}
}

BanaBridge News https://validator.w3.org/feed/docs/rss2.html Court Orders Ex-Weah Protocol Chief Jailed on US$8 Million Bail, Sends 15 Jurors to Prison Over Misconduct Women Renew Call for War and Economic Crimes Court at Liberia’s Historic Peace Prayer Site Finance Minister Ngafuan Urges Transparency, Accountability as Liberia Advances ARREST Agenda at UN Retreat PPCC Donates ICT Equipment to 50 Government Institutions to Expand Electronic Procurement System Liberia Commissions €100,000 Elemental Analyzer to Strengthen Environmental Research and Food Security EPA Ends 16 Years of Renting with Purchase of Permanent Headquarters West African Tax Bodies Deepen Partnership to Boost Revenue Mobilization, Launch Carbon Tax Study Liberia Hosts Sierra Leone Procurement Delegation for E-GP Reform Study Tour World Bank Praises Liberia’s Central Bank for Economic Stability and Private Sector Progress Liberians See Slight Improvement in Corruption Fight, But Graft Still Viewed as Widespread, CENTAL Report Finds Canada Afrique Care Foundation Set for Official Launch, Expanding Free Mental Health Access Across Canada and Africa Weah Claims Liberia Has Become a “Narco State” as Opposition Rallies Behind Calls for Independent Probe into US$19 Million Cocaine Bust EPA Boss Calls for Stronger Student Engagement, Unveils Push for Academic Partnership at UL Climate Symposium Education Minister Urges Students to Embrace Tax Responsibility at National Student Tax Day CDC Secretary General Urges U.S. Government to Review Support to Liberia National Police Liberia Partners with CACFO to Expand Mental Health Services Ahead of Global Launch Wreh-Toe Appointed Board Chair of CACFO as Foundation Strengthens Mental Health Push GIABA Opens New Information Center Headquarters in Abidjan Liberia Wins Fresh Backing as World Bank Group Executive Praises Progress, Pushes Faster Project Delivery LRA Honors Liberia’s Top Taxpayers as Revenue Collections Hit Historic High Root Cause in Question as Border Tensions Persist After Conakry Peace Deal From Enforcement to Innovation: EPA Marks 2025 as a Defining Year for Liberia’s Environment Weah Declares ‘Road to 2029 Begins Today’ as CDC Marks 22nd Anniversary in Zwedru 500 Documented Governance Failures: Activist Publishes Sweeping End-of-Year Indictment of Boakai Administration CDC Calls for Probe into Border Crisis, Cites Alleged Mining Activities Liberia Moves to Strengthen Small Businesses with $672,000 Packaging Solution Initiative Former Public Works Minister Ruth Coker Collins Defends Zwedru Corridor Strategy, Calls for “Facts Over Rhetoric” in Infrastructure Debate Power Shake-Up in CDC Diaspora: NEC Dissolves CDC-USA Interim Leadership, Appoints Rev. Muin to Lead U.S. Chapter Tweah Reemerges, Sparks Fierce National Debate Over Governance and Liberia’s Future Koijee Slams Tribal Politics and Political Manipulation in Lofa, Accuses Boakai Government Mali and Burkina Faso Impose Reciprocal Travel Ban on U.S. Citizens Guinea Election: A Turn Toward Continuity Amid Questions of Democratic Credibility Liberia’s Revenue Grows Stronger as LRA Exceeds National Target for Second Year Liberia’s Gender Legal Landscape: Laws in Place, Systems Lag Far Behind Liberia’s Economy Gains Momentum as CBL Governor Highlights Progress at ECOWAS Meeting Liberia Positions Itself for Eco Currency Entry as Economy Expands by 5.1% From Overcrowded Classrooms to Renewal: NPA Mobilizes $1 Million to Transform UL Ex-Public Works Minister Ruth Coker Collins Slams Ministry’s “Lack of Capacity,” Defends Her Infrastructure Record CDC Expels Three Senior Members, Citing Alleged Alignment With Government and Undermining Party Ideology UL to Celebrate 75 Years of Excellence Saudi Fund Advances Liberia’s Push for Major Infrastructure Development West African Financial Leaders Convene in Monrovia for ECOWAS Statutory Meetings Unlocking Liberia’s Potential: Government Launches Major Revenue and Transparency Reforms Incremental Gains, Enduring Impunity: Liberia’s CPI Improvement Fails the Test of Reform Boakai’s Call for Unity Faces Scrutiny as Opposition, Citizens Question Actions Behind the Words REMAPSEN Liberia Set to Strengthen Health and Environmental Reporting Energy Sector Women Step Into the Spotlight at Liberia’s International Women’s Day Celebration FeJAL Concludes Three-Day Retreat, Honors Outstanding Women Journalists Dr. Rasha Kelej Named Among Africa’s 100 Most Influential Leaders LAVA Honored for Strengthening Liberia–U.S. Ties at 2025 Military Ball