golden hour

/home/godaofbq/alienhyperbaric.com/wp-content/plugins/litespeed-cache/src

File/Folder	Size	Actions
.htaccess	420 B
activation.cls.php	14.99 KB
admin-display.cls.php	33.17 KB
admin-settings.cls.php	9.52 KB
admin.cls.php	4.44 KB
api.cls.php	11.08 KB
avatar.cls.php	6.06 KB
base.cls.php	29.96 KB
cdn	-
cdn-setup.cls.php	9.8 KB
cdn.cls.php	13.13 KB
cloud.cls.php	40.86 KB
conf.cls.php	18.58 KB
control.cls.php	21.25 KB
core.cls.php	20 KB
crawler-map.cls.php	13.97 KB
crawler.cls.php	35.22 KB
css.cls.php	13.1 KB
data.cls.php	16.84 KB
data.upgrade.func.php	21.37 KB
data_structure	-
db-optm.cls.php	9.58 KB
debug2.cls.php	11.83 KB
doc.cls.php	4.74 KB
error.cls.php	6.41 KB
esi.cls.php	26.62 KB
file.cls.php	10.13 KB
gui.cls.php	27.06 KB
health.cls.php	2.89 KB
htaccess.cls.php	23.92 KB
import.cls.php	4.15 KB
instance.cls.php	154 B
lang.cls.php	15.39 KB
localization.cls.php	3.39 KB
media.cls.php	30.86 KB
metabox.cls.php	4.21 KB
object-cache.cls.php	15.62 KB
object.lib.php	33.97 KB
optimize.cls.php	36.49 KB
optimizer.cls.php	8.69 KB
placeholder.cls.php	14.07 KB
preset.cls.php	5.43 KB
purge.cls.php	29.78 KB
report.cls.php	5.33 KB
rest.cls.php	7.87 KB
root.cls.php	12.59 KB
router.cls.php	17.36 KB
str.cls.php	1.17 KB
tag.cls.php	8.62 KB
task.cls.php	5.29 KB
tool.cls.php	3.29 KB
utility.cls.php	20.63 KB
vary.cls.php	19.17 KB

Edit: utility.cls.php

<?php

/**
 * The utility class.
 *
 * @since      	1.1.5
 * @since  		1.5 Moved into /inc
 */

namespace LiteSpeed;

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

class Utility extends Root
{
	private static $_internal_domains;

/**
	 * Validate regex
	 *
	 * @since 1.0.9
	 * @since  3.0 Moved here from admin-settings.cls
	 * @access public
	 * @return bool True for valid rules, false otherwise.
	 */
	public static function syntax_checker($rules)
	{
		return preg_match(self::arr2regex($rules), '') !== false;
	}

/**
	 * Combine regex array to regex rule
	 *
	 * @since  3.0
	 */
	public static function arr2regex($arr, $drop_delimiter = false)
	{
		$arr = self::sanitize_lines($arr);

$new_arr = array();
		foreach ($arr as $v) {
			$new_arr[] = preg_quote($v, '#');
		}

$regex = implode('|', $new_arr);
		$regex = str_replace(' ', '\\ ', $regex);

if ($drop_delimiter) {
			return $regex;
		}

return '#' . $regex . '#';
	}

/**
	 * Replace wildcard to regex
	 *
	 * @since  3.2.2
	 */
	public static function wildcard2regex($string)
	{
		if (is_array($string)) {
			return array_map(__CLASS__ . '::wildcard2regex', $string);
		}

if (strpos($string, '*') !== false) {
			$string = preg_quote($string, '#');
			$string = str_replace('\*', '.*', $string);
		}

return $string;
	}

/**
	 * Check if an URL or current page is REST req or not
	 *
	 * @since  2.9.3
	 * @deprecated 2.9.4 Moved to REST class
	 * @access public
	 */
	public static function is_rest($url = false)
	{
		return false;
	}

/**
	 * Get current page type
	 *
	 * @since  2.9
	 */
	public static function page_type()
	{
		global $wp_query;
		$page_type = 'default';

if ($wp_query->is_page) {
			$page_type = is_front_page() ? 'front' : 'page';
		} elseif ($wp_query->is_home) {
			$page_type = 'home';
		} elseif ($wp_query->is_single) {
			// $page_type = $wp_query->is_attachment ? 'attachment' : 'single';
			$page_type = get_post_type();
		} elseif ($wp_query->is_category) {
			$page_type = 'category';
		} elseif ($wp_query->is_tag) {
			$page_type = 'tag';
		} elseif ($wp_query->is_tax) {
			$page_type = 'tax';
			// $page_type = get_queried_object()->taxonomy;
		} elseif ($wp_query->is_archive) {
			if ($wp_query->is_day) {
				$page_type = 'day';
			} elseif ($wp_query->is_month) {
				$page_type = 'month';
			} elseif ($wp_query->is_year) {
				$page_type = 'year';
			} elseif ($wp_query->is_author) {
				$page_type = 'author';
			} else {
				$page_type = 'archive';
			}
		} elseif ($wp_query->is_search) {
			$page_type = 'search';
		} elseif ($wp_query->is_404) {
			$page_type = '404';
		}

return $page_type;

// if ( is_404() ) {
		// 	$page_type = '404';
		// }
		// elseif ( is_singular() ) {
		// 	$page_type = get_post_type();
		// }
		// elseif ( is_home() && get_option( 'show_on_front' ) == 'page' ) {
		// 	$page_type = 'home';
		// }
		// elseif ( is_front_page() ) {
		// 	$page_type = 'front';
		// }
		// elseif ( is_tax() ) {
		// 	$page_type = get_queried_object()->taxonomy;
		// }
		// elseif ( is_category() ) {
		// 	$page_type = 'category';
		// }
		// elseif ( is_tag() ) {
		// 	$page_type = 'tag';
		// }

// return $page_type;
	}

/**
	 * Get ping speed
	 *
	 * @since  2.9
	 */
	public static function ping($domain)
	{
		if (strpos($domain, ':')) {
			$domain = parse_url($domain, PHP_URL_HOST);
		}
		$starttime = microtime(true);
		$file = fsockopen($domain, 443, $errno, $errstr, 10);
		$stoptime = microtime(true);
		$status = 0;

if (!$file) {
			$status = 99999;
		}
		// Site is down
		else {
			fclose($file);
			$status = ($stoptime - $starttime) * 1000;
			$status = floor($status);
		}

Debug2::debug("[Util] ping [Domain] $domain \t[Speed] $status");

return $status;
	}

/**
	 * Set seconds/timestamp to readable format
	 *
	 * @since  1.6.5
	 * @access public
	 */
	public static function readable_time($seconds_or_timestamp, $timeout = 3600, $forword = false)
	{
		if (strlen($seconds_or_timestamp) == 10) {
			$seconds = time() - $seconds_or_timestamp;
			if ($seconds > $timeout) {
				return date('m/d/Y H:i:s', $seconds_or_timestamp + LITESPEED_TIME_OFFSET);
			}
		} else {
			$seconds = $seconds_or_timestamp;
		}

$res = '';
		if ($seconds > 86400) {
			$num = floor($seconds / 86400);
			$res .= $num . 'd';
			$seconds %= 86400;
		}

if ($seconds > 3600) {
			if ($res) {
				$res .= ', ';
			}
			$num = floor($seconds / 3600);
			$res .= $num . 'h';
			$seconds %= 3600;
		}

if ($seconds > 60) {
			if ($res) {
				$res .= ', ';
			}
			$num = floor($seconds / 60);
			$res .= $num . 'm';
			$seconds %= 60;
		}

if ($seconds > 0) {
			if ($res) {
				$res .= ' ';
			}
			$res .= $seconds . 's';
		}

if (!$res) {
			return $forword ? __('right now', 'litespeed-cache') : __('just now', 'litespeed-cache');
		}

$res = $forword ? $res : sprintf(__(' %s ago', 'litespeed-cache'), $res);

return $res;
	}

/**
	 * Convert array to string
	 *
	 * @since  1.6
	 * @access public
	 */
	public static function arr2str($arr)
	{
		if (!is_array($arr)) {
			return $arr;
		}

return base64_encode(json_encode($arr));
	}

/**
	 * Get human readable size
	 *
	 * @since  1.6
	 * @access public
	 */
	public static function real_size($filesize, $is_1000 = false)
	{
		$unit = $is_1000 ? 1000 : 1024;

if ($filesize >= pow($unit, 3)) {
			$filesize = round(($filesize / pow($unit, 3)) * 100) / 100 . 'G';
		} elseif ($filesize >= pow($unit, 2)) {
			$filesize = round(($filesize / pow($unit, 2)) * 100) / 100 . 'M';
		} elseif ($filesize >= $unit) {
			$filesize = round(($filesize / $unit) * 100) / 100 . 'K';
		} else {
			$filesize = $filesize . 'B';
		}
		return $filesize;
	}

/**
	 * Parse attributes from string
	 *
	 * @since  1.2.2
	 * @since  1.4 Moved from optimize to utility
	 * @access private
	 * @param  string $str
	 * @return array  All the attributes
	 */
	public static function parse_attr($str)
	{
		$attrs = array();
		preg_match_all('#([\w-]+)=(["\'])([^\2]*)\2#isU', $str, $matches, PREG_SET_ORDER);
		foreach ($matches as $match) {
			$attrs[$match[1]] = trim($match[3]);
		}
		return $attrs;
	}

/**
	 * Check if an array has a string
	 *
	 * Support $ exact match
	 *
	 * @since 1.3
	 * @access private
	 * @param string $needle The string to search with
	 * @param array $haystack
	 * @return bool|string False if not found, otherwise return the matched string in haystack.
	 */
	public static function str_hit_array($needle, $haystack, $has_ttl = false)
	{
		if (!$haystack) {
			return false;
		}
		/**
		 * Safety check to avoid PHP warning
		 * @see  https://github.com/litespeedtech/lscache_wp/pull/131/commits/45fc03af308c7d6b5583d1664fad68f75fb6d017
		 */
		if (!is_array($haystack)) {
			Debug2::debug('[Util] ❌ bad param in str_hit_array()!');

return false;
		}

$hit = false;
		$this_ttl = 0;
		foreach ($haystack as $item) {
			if (!$item) {
				continue;
			}

if ($has_ttl) {
				$this_ttl = 0;
				$item = explode(' ', $item);
				if (!empty($item[1])) {
					$this_ttl = $item[1];
				}
				$item = $item[0];
			}

if (substr($item, 0, 1) === '^' && substr($item, -1) === '$') {
				// do exact match
				if (substr($item, 1, -1) === $needle) {
					$hit = $item;
					break;
				}
			} elseif (substr($item, -1) === '$') {
				// match end
				if (substr($item, 0, -1) === substr($needle, -strlen($item) + 1)) {
					$hit = $item;
					break;
				}
			} elseif (substr($item, 0, 1) === '^') {
				// match beginning
				if (substr($item, 1) === substr($needle, 0, strlen($item) - 1)) {
					$hit = $item;
					break;
				}
			} else {
				if (strpos($needle, $item) !== false) {
					$hit = $item;
					break;
				}
			}
		}

if ($hit) {
			if ($has_ttl) {
				return array($hit, $this_ttl);
			}

return $hit;
		}

return false;
	}

/**
	 * Improve compatibility to PHP old versions
	 *
	 * @since  1.2.2
	 *
	 */
	public static function compatibility()
	{
		require_once LSCWP_DIR . 'lib/php-compatibility.func.php';
	}

/**
	 * Convert URI to URL
	 *
	 * @since  1.3
	 * @access public
	 * @param  string $uri `xx/xx.html` or `/subfolder/xx/xx.html`
	 * @return  string http://www.example.com/subfolder/xx/xx.html
	 */
	public static function uri2url($uri)
	{
		if (substr($uri, 0, 1) === '/') {
			self::domain_const();
			$url = LSCWP_DOMAIN . $uri;
		} else {
			$url = home_url('/') . $uri;
		}

return $url;
	}

/**
	 * Convert URL to basename (filename)
	 *
	 * @since  4.7
	 */
	public static function basename($url)
	{
		$url = trim($url);
		$uri = @parse_url($url, PHP_URL_PATH);
		$basename = pathinfo($uri, PATHINFO_BASENAME);

return $basename;
	}

/**
	 * Drop .webp if existed in filename
	 *
	 * @since  4.7
	 */
	public static function drop_webp($filename)
	{
		if (substr($filename, -5) === '.webp') {
			$filename = substr($filename, 0, -5);
		}

return $filename;
	}

/**
	 * Convert URL to URI
	 *
	 * @since  1.2.2
	 * @since  1.6.2.1 Added 2nd param keep_qs
	 * @access public
	 */
	public static function url2uri($url, $keep_qs = false)
	{
		$url = trim($url);
		$uri = @parse_url($url, PHP_URL_PATH);
		$qs = @parse_url($url, PHP_URL_QUERY);

if (!$keep_qs || !$qs) {
			return $uri;
		}

return $uri . '?' . $qs;
	}

/**
	 * Get attachment relative path to upload folder
	 *
	 * @since 3.0
	 * @access public
	 * @param  string 	`https://aa.com/bbb/wp-content/upload/2018/08/test.jpg` or `/bbb/wp-content/upload/2018/08/test.jpg`
	 * @return string 	`2018/08/test.jpg`
	 */
	public static function att_short_path($url)
	{
		if (!defined('LITESPEED_UPLOAD_PATH')) {
			$_wp_upload_dir = wp_upload_dir();

$upload_path = self::url2uri($_wp_upload_dir['baseurl']);

define('LITESPEED_UPLOAD_PATH', $upload_path);
		}

$local_file = self::url2uri($url);

$short_path = substr($local_file, strlen(LITESPEED_UPLOAD_PATH) + 1);

return $short_path;
	}

/**
	 * Make URL to be relative
	 *
	 * NOTE: for subfolder home_url, will keep subfolder part (strip nothing but scheme and host)
	 *
	 * @param  string $url
	 * @return string      Relative URL, start with /
	 */
	public static function make_relative($url)
	{
		// replace home_url if the url is full url
		self::domain_const();
		if (strpos($url, LSCWP_DOMAIN) === 0) {
			$url = substr($url, strlen(LSCWP_DOMAIN));
		}
		return trim($url);
	}

/**
	 * Convert URL to domain only
	 *
	 * @since  1.7.1
	 */
	public static function parse_domain($url)
	{
		$url = @parse_url($url);
		if (empty($url['host'])) {
			return '';
		}

if (!empty($url['scheme'])) {
			return $url['scheme'] . '://' . $url['host'];
		}

return '//' . $url['host'];
	}

/**
	 * Drop protocol `https:` from https://example.com
	 *
	 * @since  3.3
	 */
	public static function noprotocol($url)
	{
		$tmp = parse_url(trim($url));
		if (!empty($tmp['scheme'])) {
			$url = str_replace($tmp['scheme'] . ':', '', $url);
		}

return $url;
	}

/**
	 * Validate ip v4
	 * @since 5.5
	 */
	public static function valid_ipv4($ip)
	{
		return filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4 | FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE);
	}

/**
	 * Generate domain const
	 *
	 * This will generate http://www.example.com even there is a subfolder in home_url setting
	 *
	 * Conf LSCWP_DOMAIN has NO trailing /
	 *
	 * @since  1.3
	 * @access public
	 */
	public static function domain_const()
	{
		if (defined('LSCWP_DOMAIN')) {
			return;
		}

self::compatibility();
		$domain = http_build_url(get_home_url(), array(), HTTP_URL_STRIP_ALL);

define('LSCWP_DOMAIN', $domain);
	}

/**
	 * Array map one textarea to sanitize the url
	 *
	 * @since  1.3
	 * @access public
	 * @param  string $content
	 * @param  bool $type String handler type
	 * @return string|array
	 */
	public static function sanitize_lines($arr, $type = null)
	{
		$types = $type ? explode(',', $type) : array();

if (!$arr) {
			if ($type === 'string') {
				return '';
			}
			return array();
		}

if (!is_array($arr)) {
			$arr = explode("\n", $arr);
		}

$arr = array_map('trim', $arr);
		$changed = false;
		if (in_array('uri', $types)) {
			$arr = array_map(__CLASS__ . '::url2uri', $arr);
			$changed = true;
		}
		if (in_array('basename', $types)) {
			$arr = array_map(__CLASS__ . '::basename', $arr);
			$changed = true;
		}
		if (in_array('drop_webp', $types)) {
			$arr = array_map(__CLASS__ . '::drop_webp', $arr);
			$changed = true;
		}
		if (in_array('relative', $types)) {
			$arr = array_map(__CLASS__ . '::make_relative', $arr); // Remove domain
			$changed = true;
		}
		if (in_array('domain', $types)) {
			$arr = array_map(__CLASS__ . '::parse_domain', $arr); // Only keep domain
			$changed = true;
		}

if (in_array('noprotocol', $types)) {
			$arr = array_map(__CLASS__ . '::noprotocol', $arr); // Drop protocol, `https://example.com` -> `//example.com`
			$changed = true;
		}

if (in_array('trailingslash', $types)) {
			$arr = array_map('trailingslashit', $arr); // Append trailing slach, `https://example.com` -> `https://example.com/`
			$changed = true;
		}

if ($changed) {
			$arr = array_map('trim', $arr);
		}
		$arr = array_unique($arr);
		$arr = array_filter($arr);

if (in_array('string', $types)) {
			return implode("\n", $arr);
		}

return $arr;
	}

/**
	 * Builds an url with an action and a nonce.
	 *
	 * Assumes user capabilities are already checked.
	 *
	 * @since  1.6 Changed order of 2nd&3rd param, changed 3rd param `append_str` to 2nd `type`
	 * @access public
	 * @return string The built url.
	 */
	public static function build_url($action, $type = false, $is_ajax = false, $page = null, $append_arr = array())
	{
		$prefix = '?';

if ($page === '_ori') {
			$page = true;
			$append_arr['_litespeed_ori'] = 1;
		}

if (!$is_ajax) {
			if ($page) {
				// If use admin url
				if ($page === true) {
					$page = 'admin.php';
				} else {
					if (strpos($page, '?') !== false) {
						$prefix = '&';
					}
				}
				$combined = $page . $prefix . Router::ACTION . '=' . $action;
			} else {
				// Current page rebuild URL
				$params = $_GET;

if (!empty($params)) {
					if (isset($params[Router::ACTION])) {
						unset($params[Router::ACTION]);
					}
					if (isset($params['_wpnonce'])) {
						unset($params['_wpnonce']);
					}
					if (!empty($params)) {
						$prefix .= http_build_query($params) . '&';
					}
				}
				global $pagenow;
				$combined = $pagenow . $prefix . Router::ACTION . '=' . $action;
			}
		} else {
			$combined = 'admin-ajax.php?action=litespeed_ajax&' . Router::ACTION . '=' . $action;
		}

if (is_network_admin()) {
			$prenonce = network_admin_url($combined);
		} else {
			$prenonce = admin_url($combined);
		}
		$url = wp_nonce_url($prenonce, $action, Router::NONCE);

if ($type) {
			// Remove potential param `type` from url
			$url = parse_url(htmlspecialchars_decode($url));
			parse_str($url['query'], $query);

$built_arr = array_merge($query, array(Router::TYPE => $type));
			if ($append_arr) {
				$built_arr = array_merge($built_arr, $append_arr);
			}
			$url['query'] = http_build_query($built_arr);
			self::compatibility();
			$url = http_build_url($url);
			$url = htmlspecialchars($url, ENT_QUOTES, 'UTF-8');
		}

return $url;
	}

/**
	 * Check if the host is the internal host
	 *
	 * @since  1.2.3
	 *
	 */
	public static function internal($host)
	{
		if (!defined('LITESPEED_FRONTEND_HOST')) {
			if (defined('WP_HOME')) {
				$home_host = WP_HOME; // Also think of `WP_SITEURL`
			} else {
				$home_host = get_option('home');
			}
			define('LITESPEED_FRONTEND_HOST', parse_url($home_host, PHP_URL_HOST));
		}

if ($host === LITESPEED_FRONTEND_HOST) {
			return true;
		}

/**
		 * Filter for multiple domains
		 * @since 2.9.4
		 */
		if (!isset(self::$_internal_domains)) {
			self::$_internal_domains = apply_filters('litespeed_internal_domains', array());
		}

if (self::$_internal_domains) {
			return in_array($host, self::$_internal_domains);
		}

return false;
	}

/**
	 * Check if an URL is a internal existing file
	 *
	 * @since  1.2.2
	 * @since  1.6.2 Moved here from optm.cls due to usage of media.cls
	 * @access public
	 * @return string|bool The real path of file OR false
	 */
	public static function is_internal_file($url, $addition_postfix = false)
	{
		if (substr($url, 0, 5) == 'data:') {
			Debug2::debug2('[Util] data: content not file');
			return false;
		}
		$url_parsed = parse_url($url);
		if (isset($url_parsed['host']) && !self::internal($url_parsed['host'])) {
			// Check if is cdn path
			// Do this to avoid user hardcoded src in tpl
			if (!CDN::internal($url_parsed['host'])) {
				Debug2::debug2('[Util] external');
				return false;
			}
		}

if (empty($url_parsed['path'])) {
			return false;
		}

// Need to replace child blog path for assets, ref: .htaccess
		if (is_multisite() && defined('PATH_CURRENT_SITE')) {
			$pattern = '#^' . PATH_CURRENT_SITE . '([_0-9a-zA-Z-]+/)(wp-(content|admin|includes))#U';
			$replacement = PATH_CURRENT_SITE . '$2';
			$url_parsed['path'] = preg_replace($pattern, $replacement, $url_parsed['path']);
			// $current_blog = (int) get_current_blog_id();
			// $main_blog_id = (int) get_network()->site_id;
			// if ( $current_blog === $main_blog_id ) {
			// 	define( 'LITESPEED_IS_MAIN_BLOG', true );
			// }
			// else {
			// 	define( 'LITESPEED_IS_MAIN_BLOG', false );
			// }
		}

// Parse file path
		/**
		 * Trying to fix pure /.htaccess rewrite to /wordpress case
		 *
		 * Add `define( 'LITESPEED_WP_REALPATH', '/wordpress' );` in wp-config.php in this case
		 *
		 * @internal #611001 - Combine & Minify not working?
		 * @since  1.6.3
		 */
		if (substr($url_parsed['path'], 0, 1) === '/') {
			if (defined('LITESPEED_WP_REALPATH')) {
				$file_path_ori = $_SERVER['DOCUMENT_ROOT'] . LITESPEED_WP_REALPATH . $url_parsed['path'];
			} else {
				$file_path_ori = $_SERVER['DOCUMENT_ROOT'] . $url_parsed['path'];
			}
		} else {
			$file_path_ori = Router::frontend_path() . '/' . $url_parsed['path'];
		}

/**
		 * Added new file postfix to be check if passed in
		 * @since 2.2.4
		 */
		if ($addition_postfix) {
			$file_path_ori .= '.' . $addition_postfix;
		}

/**
		 * Added this filter for those plugins which overwrite the filepath
		 * @see #101091 plugin `Hide My WordPress`
		 * @since 2.2.3
		 */
		$file_path_ori = apply_filters('litespeed_realpath', $file_path_ori);

$file_path = realpath($file_path_ori);
		if (!is_file($file_path)) {
			Debug2::debug2('[Util] file not exist: ' . $file_path_ori);
			return false;
		}

return array($file_path, filesize($file_path));
	}

/**
	 * Safely parse URL for v5.3 compatibility
	 *
	 * @since  3.4.3
	 */
	public static function parse_url_safe($url, $component = -1)
	{
		if (substr($url, 0, 2) == '//') {
			$url = 'https:' . $url;
		}

return parse_url($url, $component);
	}

/**
	 * Replace url in srcset to new value
	 *
	 * @since  2.2.3
	 */
	public static function srcset_replace($content, $callback)
	{
		preg_match_all('# srcset=([\'"])(.+)\g{1}#iU', $content, $matches);
		$srcset_ori = array();
		$srcset_final = array();
		foreach ($matches[2] as $k => $urls_ori) {
			$urls_final = explode(',', $urls_ori);

$changed = false;

foreach ($urls_final as $k2 => $url_info) {
				$url_info_arr = explode(' ', trim($url_info));

if (!($url2 = call_user_func($callback, $url_info_arr[0]))) {
					continue;
				}

$changed = true;

$urls_final[$k2] = str_replace($url_info_arr[0], $url2, $url_info);

Debug2::debug2('[Util] - srcset replaced to ' . $url2 . (!empty($url_info_arr[1]) ? ' ' . $url_info_arr[1] : ''));
			}

if (!$changed) {
				continue;
			}

$urls_final = implode(',', $urls_final);

$srcset_ori[] = $matches[0][$k];

$srcset_final[] = str_replace($urls_ori, $urls_final, $matches[0][$k]);
		}

if ($srcset_ori) {
			$content = str_replace($srcset_ori, $srcset_final, $content);
			Debug2::debug2('[Util] - srcset replaced');
		}

return $content;
	}

/**
	 * Generate pagination
	 *
	 * @since 3.0
	 * @access public
	 */
	public static function pagination($total, $limit, $return_offset = false)
	{
		$pagenum = isset($_GET['pagenum']) ? absint($_GET['pagenum']) : 1;

$offset = ($pagenum - 1) * $limit;
		$num_of_pages = ceil($total / $limit);

if ($offset > $total) {
			$offset = $total - $limit;
		}

if ($offset < 0) {
			$offset = 0;
		}

if ($return_offset) {
			return $offset;
		}

$page_links = paginate_links(array(
			'base' => add_query_arg('pagenum', '%#%'),
			'format' => '',
			'prev_text' => '&laquo;',
			'next_text' => '&raquo;',
			'total' => $num_of_pages,
			'current' => $pagenum,
		));

return '<div class="tablenav"><div class="tablenav-pages" style="margin: 1em 0">' . $page_links . '</div></div>';
	}

/**
	 * Generate placeholder for an array to query
	 *
	 * @since 2.0
	 * @access public
	 */
	public static function chunk_placeholder($data, $fields)
	{
		$division = substr_count($fields, ',') + 1;

$q = implode(
			',',
			array_map(function ($el) {
				return '(' . implode(',', $el) . ')';
			}, array_chunk(array_fill(0, count($data), '%s'), $division))
		);

return $q;
	}
}