false, ]; $args = wp_parse_args( $args, $defaults ); if ( ! preg_match_all( '@\s.+)>.*@iUs', $buffer, $iframes, PREG_SET_ORDER ) ) { return $html; } $iframes = array_unique( $iframes, SORT_REGULAR ); foreach ( $iframes as $iframe ) { if ( $this->isIframeExcluded( $iframe ) ) { continue; } // Given the previous regex pattern, $iframe['atts'] starts with a whitespace character. if ( ! preg_match( '@\ssrc\s*=\s*(\'|")(?.*)\1@iUs', $iframe['atts'], $atts ) ) { continue; } $iframe['src'] = trim( $atts['src'] ); if ( '' === $iframe['src'] ) { continue; } if ( $args['youtube'] ) { $iframe_lazyload = $this->replaceYoutubeThumbnail( $iframe ); } if ( empty( $iframe_lazyload ) ) { $iframe_lazyload = $this->replaceIframe( $iframe ); } $html = str_replace( $iframe[0], $iframe_lazyload, $html ); unset( $iframe_lazyload ); } return $html; } /** * Checks if the provided iframe is excluded from lazyload * * @param array $iframe Array of matched patterns. * @return boolean */ public function isIframeExcluded( $iframe ) { foreach ( $this->getExcludedPatterns() as $excluded_pattern ) { if ( strpos( $iframe[0], $excluded_pattern ) !== false ) { return true; } } return false; } /** * Gets patterns excluded from lazyload for iframes * * @since 2.1.1 * * @return array */ private function getExcludedPatterns() { /** * Filters the patterns excluded from lazyload for iframes * * @since 2.1.1 * * @param array $excluded_patterns Array of excluded patterns. */ return apply_filters( 'rocket_lazyload_iframe_excluded_patterns', [ 'gform_ajax_frame', 'data-no-lazy=', 'recaptcha/api/fallback', 'loading="eager"', 'data-skip-lazy', 'skip-lazy', 'google_ads_iframe_', ] ); } /** * Applies lazyload on the iframe provided * * @param array $iframe Array of matched elements. * @return string */ private function replaceIframe( $iframe ) { /** * Filter the LazyLoad placeholder on src attribute * * @since 1.0 * * @param string $placeholder placeholder that will be printed. */ $placeholder = apply_filters( 'rocket_lazyload_placeholder', 'about:blank' ); $placeholder_atts = str_replace( $iframe['src'], $placeholder, $iframe['atts'] ); $iframe_lazyload = str_replace( $iframe['atts'], $placeholder_atts . ' data-rocket-lazyload="fitvidscompatible" data-lazy-src="' . esc_url( $iframe['src'] ) . '"', $iframe[0] ); if ( ! preg_match( '@\sloading\s*=\s*(\'|")(?:lazy|auto)\1@i', $iframe_lazyload ) ) { $iframe_lazyload = str_replace( ''; return $iframe_lazyload; } /** * Replaces the iframe provided by the Youtube thumbnail * * @param array $iframe Array of matched elements. * @return bool|string */ private function replaceYoutubeThumbnail( $iframe ) { $youtube_id = $this->getYoutubeIDFromURL( $iframe['src'] ); if ( ! $youtube_id ) { return false; } $query = wp_parse_url( htmlspecialchars_decode( $iframe['src'] ), PHP_URL_QUERY ); $youtube_url = $this->changeYoutubeUrlForYoutuDotBe( $iframe['src'] ); $youtube_url = $this->cleanYoutubeUrl( $iframe['src'] ); /** * Filter the LazyLoad HTML output on Youtube iframes * * @since 2.11 * * @param array $html Output that will be printed. */ $youtube_lazyload = apply_filters( 'rocket_lazyload_youtube_html', '

' ); $youtube_lazyload .= ''; return $youtube_lazyload; } /** * Gets the Youtube ID from the URL provided * * @param string $url URL to search. * @return bool|string */ public function getYoutubeIDFromURL( $url ) { $pattern = '#^(?:https?:)?(?://)?(?:www\.)?(?:youtu\.be|youtube\.com|youtube-nocookie\.com)/(?:embed/|v/|watch/?\?v=)?([\w-]{11})#iU'; $result = preg_match( $pattern, $url, $matches ); if ( ! $result ) { return false; } // exclude playlist. if ( 'videoseries' === $matches[1] ) { return false; } return $matches[1]; } /** * Changes URL youtu.be/ID to youtube.com/embed/ID * * @param string $url URL to replace. * @return string Unchanged URL or modified URL. */ public function changeYoutubeUrlForYoutuDotBe( $url ) { $pattern = '#^(?:https?:)?(?://)?(?:www\.)?(?:youtu\.be)/(?:embed/|v/|watch/?\?v=)?([\w-]{11})#iU'; $result = preg_match( $pattern, $url, $matches ); if ( ! $result ) { return $url; } return 'https://www.youtube.com/embed/' . $matches[1]; } /** * Cleans Youtube URL. Keeps only scheme, host and path. * * @param string $url URL to be cleaned. * @return string Cleaned URL */ public function cleanYoutubeUrl( $url ) { $parsed_url = wp_parse_url( $url, -1 ); $scheme = isset( $parsed_url['scheme'] ) ? $parsed_url['scheme'] . '://' : '//'; $host = isset( $parsed_url['host'] ) ? $parsed_url['host'] : ''; $path = isset( $parsed_url['path'] ) ? $parsed_url['path'] : ''; return $scheme . $host . $path; } }