PHP实例：php获取YouTube视频信息的方法

//根据video id 获取YouTube视频信息 
function getYouTubeInfo($video_id){ 
    $content = file_get_contents("http://youtube.com/get_video_info?video_id=" . $video_id);   
    parse_str($content, $ytarr); 
    return $ytarr; 
} 
 
$video_id = 'psvkyf3PzjE';   
$ytinfo = getYouTubeInfo($video_id); 
 
echo '<meta http-equiv="content-type" content="text/html;charset=utf-8">'; 
echo '<p><strong>'.$ytinfo['title'].'</strong></p>';     // 标题 
echo '<p><img src="'.$ytinfo['thumbnail_url'].'"></p>';  // 缩略图 
echo '<p><img src="'.$ytinfo['iurlmq'].'"></p>';         // 中图 
echo '<p><img src="'.$ytinfo['iurl'].'"></p>';           // 大图 
 
echo '<pre>'; 
print_r($ytinfo); 
echo '</pre>';

Array 
( 
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    [length_seconds] => 151 
    [adsense_video_doc_id] => yt_psvkyf3PzjE 
    [iv_allow_in_place_switch] => 1 
    [plid] => AAT-OeiZGx1hsKAp 
    [title] => 10 Amazing Practical Jokes 
    [ptchn] => vGMGQC8gNkd4gwxSbABIlw 
    [sw] => 1.0 
    [pyv_in_related_cafe_experiment_id] =>  
    [ad_device] => 1 
    [rmktPingThreshold] => 0 
    [use_cipher_signature] => False 
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    [ptk] => Quirkology%2Buser 
    [tag_for_child_directed] => False 
    [ad_host] => ca-host-pub-8542631585713003 
    [gut_tag] => /4061/ytunknown/main 
    [track_embed] => 1 
    [iurl] => http://i1.ytimg.com/vi/psvkyf3PzjE/hqdefault.jpg 
    [has_cc] => True 
    [ytfocEnabled] => 1 
    [aid] => P82cR0jfshg 
    [view_count] => 8955678 
    [enablecsi] => 1 
    [csi_page_type] => embed 
    [idpj] => -5 
    [pltype] => content 
    [instream_long] => False 
    [timestamp] => 1405424575 
    [ad_eurl] => http://www.youtube.com/video/psvkyf3PzjE 
    [video_verticals] => [3, 33, 211, 539, 937] 
    [no_get_video_log] => 1 
    [c] => WEB 
    [avg_rating] => 4.87036008516 
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    [iurlsd] => http://i1.ytimg.com/vi/psvkyf3PzjE/sddefault.jpg 
    [loeid] => 903802,908561,941365,950844 
    [afv] => True 
    [cafe_experiment_id] =>  
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    [as_launched_in_country] => 1 
    [iv_invideo_url] => http://www.youtube.com/annotations_invideo?cap_hist=1&cta=2&video_id=psvkyf3PzjE 
    [cc_asr] => 1 
    [eventid] => vxPFU4bgLozf4QL30oGQDQ 
    [advideo] => 1 
    [allow_embed] => 1 
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    [sffb] => True 
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    [status] => ok 
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