[lakpo]

+1 Jean ta technique fonctionne...

voici l'udt , avec lequel on peut appeler soit une vignette, soit l'image, soit l'iframe de la vidéo. Cela peut-être cool pour une gallery video, un carroussel (avec list2it par exemple) ou encore pour content-perso , un champ d'article etc...

• {videos link="liensyoutube"} retourne l'id
  
• {videos link="liensyoutube" action="default"}retourne l'id
  
• {videos link="liensyoutube" action="thumb"}retourne une vignette
  
• {videos link="liensyoutube" action="img"}retourne l'image
  
• {videos link="liensyoutube" action="iframe"}retourne un iframe
  

Code :

[== PHP ==]
if (!function_exists(parse_youtube)) {
    function parse_youtube($link){

        $regexstr = '~
            # Match Youtube link and embed code
            (?:                             # Group to match embed codes
                (?:<iframe [^>]*src=")?       # If iframe match up to first quote of src
                |(?:                        # Group to match if older embed
                    (?:<object .*>)?      # Match opening Object tag
                    (?:<param .*</param>)*  # Match all param tags
                    (?:<embed [^>]*src=")?  # Match embed tag to the first quote of src
                )?                          # End older embed code group
            )?                              # End embed code groups
            (?:                             # Group youtube url
                https?:\/\/                 # Either http or https
                (?:[\w]+\.)*                # Optional subdomains
                (?:                         # Group host alternatives.
                youtu\.be/                  # Either youtu.be,
                | youtube\.com              # or youtube.com
                | youtube-nocookie\.com     # or youtube-nocookie.com
                )                           # End Host Group
                (?:\S*[^\w\-\s])?           # Extra stuff up to VIDEO_ID
                ([\w\-]{11})                # $1: VIDEO_ID is numeric
                [^\s]*                      # Not a space
            )                               # End group
            "?                              # Match end quote if part of src
            (?:[^>]*>)?                       # Match any extra stuff up to close brace
            (?:                             # Group to match last embed code
                </iframe>                 # Match the end of the iframe
                |</embed></object>          # or Match the end of the older embed
            )?                              # End Group of last bit of embed code
            ~ix';

        preg_match($regexstr, $link, $matches);

        return $matches[1];

    }
}
if(isset($params['link']) && $params['link'] !=""){
    $id=parse_youtube($params['link']);
    if($params['action'] =="thumb"){

        echo "<img src='http://img.youtube.com/vi/".$id."/2.jpg'>";

    }else if($params['action'] =="img"){
        echo "<img src='http://img.youtube.com/vi/".$id."/0.jpg'>";
    }else if($params['action'] =="iframe"){
        echo '<iframe width="560" height="315" src="//www.youtube.com/embed/'.$id.'" frameborder="0" allowfullscreen></iframe>';
    }else if($params['action'] =="default" || empty($params['action'])){
        echo $id;
    }
}

désolé par contre l'expression régulière n'est pas de moi et je trouve plus la source