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Extracts a YouTube iframe video from a string.
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| /** | |
| * extract_youtube_video | |
| * Extracts a YouTube iframe video from a string. | |
| * | |
| * @since 1.0.0 | |
| * @version 1.0.0 | |
| **/ | |
| function extract_youtube_video($string, $decode = true){ | |
| // Decode string. | |
| $content = ($decode) ? html_entity_decode($string, ENT_QUOTES, 'utf-8') : $string; | |
| // Search for iframe. | |
| if(strpos($content, 'iframe') !== false){ | |
| // Use PHP DOMDocument. | |
| $doc = new DOMDocument(); | |
| // Get HTML. | |
| $doc->loadHTML($content); | |
| // Get video source. | |
| $youtube = $doc->getElementsByTagName('iframe')->item(0)->getAttribute('src'); | |
| // Find opening position of iframe. | |
| $pos1 = strpos($content, '<iframe'); | |
| // Find closing position of iframe. | |
| $pos2 = strpos($content, '</iframe>'); | |
| // Get string to remove. | |
| $len = $pos2 - $pos1; | |
| // Create YouTube video. | |
| $youtube = '<div class="embed-container"><iframe src="' . $youtube . '" frameborder="0" allowfullscreen></iframe></div>'; | |
| // Replace current iframe with modified one. | |
| $replaced = substr_replace($content, $youtube, $pos1, $len); | |
| // Return new responsive embed string with rest of text applied. | |
| return $replaced; | |
| } | |
| // If no iframe, return string as required. | |
| else{ | |
| return ($decode) ? html_entity_decode($string, ENT_QUOTES, 'utf-8') : $string; | |
| } | |
| } |
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