Файловый менеджер - Редактировать - /home/infrafs/INFRABIKEUS/wp-content/plugins/sg-cachepress/core/DNS/Prefetch.php
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<?php namespace SiteGround_Optimizer\DNS; /** * DNS Prefetching class. */ class Prefetch { /** * The singleton instance. * * @since 5.6.0 * * @var The singleton instance. */ private static $instance; /** * The constructor. */ public function __construct() { self::$instance = $this; } /** * Get the singleton instance. * * @since 5.6.0 * * @return \DNS prefetch The singleton instance. */ public static function get_instance() { if ( null == self::$instance ) { static::$instance = new self(); } return self::$instance; } /** * Run the dns-prefetch link insertion. * * @since 5.6.0 * * @param string $html The HTML Content. */ public function run( $html ) { // Check if there are any urls inserted by the user. $urls = get_option( 'siteground_optimizer_dns_prefetch_urls', false ); // Return, if no url's are set by the user. if ( empty( $urls ) ) { return $html; } $new_html = ''; // Loop trough urls and prepare them for insertion. foreach ( $urls as $url ) { // Replace the protocol with //. $url_without_protocol = preg_replace( '~(?:(?:https?:)?(?:\/\/)(?:www\.|(?!www)))?((?:.*?)\.(?:.*))~', '//$1', $url ); // Remove the protocol if for some reason url has passed with it. $new_html .= '<link rel="dns-prefetch" href="' . $url_without_protocol . '" data-set-by="SiteGround Optimizer"/>'; } // Insert the link in the head section. return str_replace( '</head>', $new_html . '</head>', $html ); } }
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