[PHP & JavaScript] How To Parse Youtube URL to Get Video ID, Thumbnail Image, or Embed Code

/*
* parse_youtube_url() PHP function
* Author: takien
* URL: http://takien.com
*
* @param string $url URL to be parsed, eg:
* http://youtu.be/zc0s358b3Ys,
* http://www.youtube.com/embed/zc0s358b3Ys
* http://www.youtube.com/watch?v=zc0s358b3Ys
* @param string $return what to return
* - embed, return embed code
* - thumb, return URL to thumbnail image
* - hqthumb, return URL to high quality thumbnail image.
* @param string $width width of embeded video, default 560
* @param string $height height of embeded video, default 349
* @param string $rel whether embeded video to show related video after play or not.
 
*/
 
function parse_youtube_url($url,$return='embed',$width='',$height='',$rel=0){
    $urls = parse_url($url);
 
    //url is http://youtu.be/xxxx
    if($urls['host'] == 'youtu.be'){ 
        $id = ltrim($urls['path'],'/');
    }
    //url is http://www.youtube.com/embed/xxxx
    else if(strpos($urls['path'],'embed') == 1){ 
        $id = end(explode('/',$urls['path']));
    }
     //url is xxxx only
    else if(strpos($url,'/')===false){
        $id = $url;
    }
    //http://www.youtube.com/watch?feature=player_embedded&v=m-t4pcO99gI
    //url is http://www.youtube.com/watch?v=xxxx
    else{
        parse_str($urls['query']);
        $id = $v;
        if(!empty($feature)){
            $id = end(explode('v=',$urls['query']));
        }
    }
    //return embed iframe
    if($return == 'embed'){
        return '</pre>
<iframe src="http://www.youtube.com/embed/'.$id.'?rel='.$rel.'" frameborder="0" width="'.($width?$width:560).'" height="'.($height?$height:349).'"></iframe>
<pre>';
    }
    //return normal thumb
    else if($return == 'thumb'){
        return 'http://i1.ytimg.com/vi/'.$id.'/default.jpg';
    }
    //return hqthumb
    else if($return == 'hqthumb'){
        return 'http://i1.ytimg.com/vi/'.$id.'/hqdefault.jpg';
    }
    // else return id
    else{
        return $id;
    }
}

<?php 
echo parse_youtube_url('http://youtu.be/zc0s358b3Ys','hqthumb'); //return http://i1.ytimg.com/vi/zc0s358b3Ys/hqdefault.jpg 
echo parse_youtube_url('http://www.youtube.com/watch?v=zc0s358b3Ys','embed'); //return embed code (iframe) 
?>

<?php
/*
* YoutubeParser() PHP class
* @author: takien
* @version: 1.0
* @date: June 16, 2012
* URL: http://takien.com/864/php-how-to-parse-youtube-url-to-get-video-id-thumbnail-image-or-embed-code.php
*
* @param string $source content source to be parsed, eg: a string or page contains youtube links or videos.
* @param boolean $unique whether the return should be unique (duplicate result will be removed)
* @param boolean $suggested whether show suggested video after finished playing
* @param boolean $https whether use https or http, default false ( http )
* @param string $width width of embeded video, default 420
* @param string $height height of embeded video, default 315
* @param boolean $privacy whether to use 'privacy enhanced mode or not', 
* if true then the returned Youtube domain would be youtube-nocookie.com
*/
class YoutubeParser{
    var $source    = '';
    var $unique    = false;
    var $suggested = false;
    var $https     = false;
    var $privacy   = false;
    var $width     = 420;
    var $height    = 315;
 
    function __construct(){
    }
 
    function set($key,$val){
        return $this->$key = $val;
    }
    function getall(){
        $return = Array();
        $domain = 'http'.($this->https?'s':'').'://www.youtube'.($this->privacy?'-nocookie':'').'.com';
        $size   = 'width="'.$this->width.'" height="'.$this->height.'"';
 
        preg_match_all('/(youtu.be\/|\/watch\?v=|\/embed\/)([a-z0-9\-_]+)/i',$this->source,$matches);
        if(isset($matches[2])){
            if($this->unique){
                $matches[2] = array_values(array_unique($matches[2]));
            }
            foreach($matches[2] as $key=>$id) {
                $return[$key]['id']       = $id;
                $return[$key]['embed']    = '<iframe '.$size.' src="'.$domain.'/embed/'.$id.($this->suggested?'':'?rel=0').'" frameborder="0" allowfullscreen></iframe>';
                $return[$key]['embedold'] = '<object '.$size.'>
                <param name="movie" value="'.$domain.'/v/'.$id.'?version=3'.($this->suggested?'':'&amp;rel=0').'"></param>
                <param name="allowFullScreen" value="true"></param>
                <param name="allowscriptaccess" value="always"></param>
                <embed src="'.$domain.'/v/'.$id.'?version=3'.($this->suggested?'':'&amp;rel=0').'" type="application/x-shockwave-flash" '.$size.' allowscriptaccess="always" allowfullscreen="true"></embed>
                </object>';
                $return[$key]['thumb']    = 'http://i4.ytimg.com/vi/'.$id.'/default.jpg';
                $return[$key]['hqthumb']  = 'http://i4.ytimg.com/vi/'.$id.'/hqdefault.jpg';
            }
        }
        return $return;
    }
}

$content = 'This is the example content contains various Youtube URLS http://www.youtube.com/watch?v=R55e-uHQna0&feature=topvideos http://www.youtube.com/watch?v=iP526fG_M0Y <p><iframe title="YouTube video player" width="480" height="390" src="http://www.youtube.com/embed/26YwnQijaOg" frameborder="0" allowfullscreen></iframe></p> <p>Lorem ipsum dolor sit amet</p>
http://www.youtube.com/embed/26YwnQijaOg Lorem ipsum dolor sit amet http://youtu.be/1u7a5otGnFc Lorem ipsum dolor sit amet http://www.youtube.com/watch?v=CYxw78Fhaug&feature=g-logo';
 
$youtube = new YoutubeParser;
$youtube->set('source',$content);
$youtube->set('unique',true);
 
echo'<pre>';
print_r($youtube->getall());
echo'</pre>';

$youtube = new YoutubeParser;
$youtube->set('source','http://www.youtube.com/watch?v=R55e-uHQna0&feature=topvideos');
 
echo'<pre>';
print_r($youtube->getall());
echo'</pre>';