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?
(?
??? [ttsurl] => http://www.youtube.com/api/timedtext?v=psvkyf3PzjE&expire=1405449775&asr_langs=fr%2Cpt%2Cnl%2Ces%2Cit%2Cde%2Cen%2Cja%2Cru%2Cko&caps=asr&sparams=asr_langs%2Ccaps%2Cv%2Cexpire&signature=20784B16B4F6C4CF09E27D1267B033EE39ECAD7F.2815379028207B479B0DFC818804EE8B07EFDA96&key=yttt1&hl=zh_HK?
??? [hl] => zh_HK?
??? [iv_load_policy] => 1?
??? [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?
??? [account_playback_token] => QUFFLUhqay1iUzhSU0V5RUZreHlFb3JDcUx3eVJOSnVRd3xBQ3Jtc0trVHRiY1RxejNPNmt4ZHlUS0dNSzgzOUFTOW5Pd05mN2kxenNaWU12UGxzWExRVzlFZG1vdmxFRDZpNXBfVUQzdGpYbEZNbXZ3SG9PX0VucHlaQmJxWEtJbWNUVk9qYTFiUi03NGpJNU5pbkNhaXdMOA==?
??? [storyboard_spec] => http://i1.ytimg.com/sb/psvkyf3PzjE/storyboard3_L$L/$N.jpg|48#27#100#10#10#0#default#U1k21Pz8pIncmT1q3DRcxfHAX-M|61#45#77#10#10#2000#M$M#djvTKb0T1vNlFvNsZg1Fk4Os2D4|123#90#77#5#5#2000#M$M#dQFZyMyJWsgSI4imKk7swh2iyFs?
??? [ad_module] => http://s.ytimg.com/yts/swfbin/player-vflo5lBXw/ad.swf?
??? [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?
??? [afv_ad_tag] => http://googleads.g.doubleclick.net/pagead/ads?ad_type=text_image_flash&client=ca-pub-6219811747049371&description_url=http%3A%2F%2Fwww.youtube.com%2Fvideo%2Fpsvkyf3PzjE&hl=zh&host=ca-host-pub-8542631585713003&ht_id=5437415&loeid=903802,908561,941365,950844&url=http%3A%2F%2Fwww.youtube.com%2Fvideo%2Fpsvkyf3PzjE&ytdevice=1&yt_pt=APb3F2872adH7YS_TG-YymJq9di8wBzQOkAnXpMipeVU0r2mlfwTVxN2ctKxFVKaIS9T_PkpW7O6oZvyWyekRhSFs5-Xzi1EEjEdzSCExqO2Qsixwq_0z3S2l94eYc-nkda4brbMiPCR4F7WprSp&channel=yt_mpvid_OeTh0jm40F5BmeEA%2Byt_cid_7379%2Byt_no_ap%2Bytdevice_1%2Bafv_user_id_vGMGQC8gNkd4gwxSbABIlw%2Bafv_user_quirkology%2Bytel_embedded%2Bytps_default%2BVertical_8%2BVertical_33%2BVertical_36%2BVertical_211%2BVertical_539%2BVertical_613%2BVertical_937%2Bafv_overlay%2Binvideo_overlay_480x70_cat27?
??? [iurlsd] => http://i1.ytimg.com/vi/psvkyf3PzjE/sddefault.jpg?
??? [loeid] => 903802,950844?
??? [afv] => True?
??? [cafe_experiment_id] =>??
??? [dashmpd] => http://manifest.googlevideo.com/api/manifest/dash/upn/f2nEB_KIghU/id/o-AKm8X5p-waOfjKuduWXVRoaCAHWLVisXWk4acX1jqKuq/signature/C73E49120EA6BB8825C670AF1EF28837D096D227.01BF67F4E38FC40D5DA612E8ACC2CB7F3D9DF11E/mws/yes/ipbits/0/sparams/as%2Cid%2Cip%2Cipbits%2Citag%2Cplayback_host%2Csource%2Cexpire/as/fmp4_audio_clear%2Cwebm_audio_clear%2Cfmp4_sd_hd_clear%2Cwebm_sd_hd_clear/mt/1405424547/fexp/902408%2C903802%2C908561%2C924213%2C924217%2C924222%2C930008%2C934024%2C934030%2C936927%2C941365%2C950844/itag/0/expire/1405447200/ip/114.142.144.2/sver/3/key/yt5/ms/au/mv/m/source/youtube/playback_host/r1---sn-i3b7rn7k.googlevideo.com?
??? [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?
??? [adaptive_fmts] => 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s%26key%3Dyt5%26ms%3Dau%26sver%3D3%26source%3Dyoutube%26gir%3Dyes&size=320x240&init=0-233,bitrate=111638&itag=160&clen=2044016&lmt=1389170357716230&index=672-1039&type=video%2Fmp4%3B+codecs%3D%22avc1.4d400c%22&url=http%3A%2F%2Fr1---sn-i3b7rn7k.googlevideo.com%2Fvideoplayback%3Fdur%3D150.760%26id%3Do-AKm8X5p-waOfjKuduWXVRoaCAHWLVisXWk4acX1jqKuq%26expire%3D1405447200%26upn%3DKGNUK6LuT04%26ipbits%3D0%26sparams%3Dclen%252Cdur%252Cgir%252Cid%252Cip%252Cipbits%252Citag%252Clmt%252Csource%252Cupn%252Cexpire%26signature%3D12D3F657364F94D535996A1CFE7C41797CB7958B.EBDF1D5F7EA15E99101D8468C8F3C3BAC609D097%26mt%3D1405424547%26fexp%3D902408%252C903802%252C908561%252C924213%252C924217%252C924222%252C930008%252C934024%252C934030%252C936927%252C941365%252C950844%26mv%3Dm%26itag%3D160%26clen%3D2044016%26ip%3D114.142.144.2%26lmt%3D1389170357716230%26mws%3Dyes%26key%3Dyt5%26ms%3Dau%26sver%3D3%26source%3Dyoutube%26gir%3Dyes&size=192x144&init=0-671,bitrate=128037&itag=140&clen=2396685&lmt=1389170356479565&index=592-815&type=audio%2Fmp4%3B+codecs%3D%22mp4a.40.2%22&url=http%3A%2F%2Fr1---sn-i3b7rn7k.googlevideo.com%2Fvideoplayback%3Fdur%3D150.860%26id%3Do-AKm8X5p-waOfjKuduWXVRoaCAHWLVisXWk4acX1jqKuq%26expire%3D1405447200%26upn%3DKGNUK6LuT04%26ipbits%3D0%26sparams%3Dclen%252Cdur%252Cgir%252Cid%252Cip%252Cipbits%252Citag%252Clmt%252Csource%252Cupn%252Cexpire%26signature%3DD4D185CE90BE2AED0DFF29AFF51F8FD31F7E038F.78F7D90CFEE7B73FF1BB863DDDCDDEF9AC88BE99%26mt%3D1405424547%26fexp%3D902408%252C903802%252C908561%252C924213%252C924217%252C924222%252C930008%252C934024%252C934030%252C936927%252C941365%252C950844%26mv%3Dm%26itag%3D140%26clen%3D2396685%26ip%3D114.142.144.2%26lmt%3D1389170356479565%26mws%3Dyes%26key%3Dyt5%26ms%3Dau%26sver%3D3%26source%3Dyoutube%26gir%3Dyes&init=0-591,bitrate=140964&itag=171&clen=2440463&lmt=1392713197841716&index=4452-4720&type=audio%2Fwebm%3B+codecs%3D%22vorbis%22&url=http%3A%2F%2Fr1---sn-i3b7rn7k.googlevideo.com%2Fvideoplayback%3Fdur%3D150.792%26id%3Do-AKm8X5p-waOfjKuduWXVRoaCAHWLVisXWk4acX1jqKuq%26expire%3D1405447200%26upn%3DKGNUK6LuT04%26ipbits%3D0%26sparams%3Dclen%252Cdur%252Cgir%252Cid%252Cip%252Cipbits%252Citag%252Clmt%252Csource%252Cupn%252Cexpire%26signature%3D99AC6494636CD4657F2665413AF44C603D69A03F.EFAA5D2D5B358C4B89285A852DA73601855B2268%26mt%3D1405424547%26fexp%3D902408%252C903802%252C908561%252C924213%252C924217%252C924222%252C930008%252C934024%252C934030%252C936927%252C941365%252C950844%26mv%3Dm%26itag%3D171%26clen%3D2440463%26ip%3D114.142.144.2%26lmt%3D1392713197841716%26mws%3Dyes%26key%3Dyt5%26ms%3Dau%26sver%3D3%26source%3Dyoutube%26gir%3Dyes&init=0-4451?
??? [cc_font] => Arial Unicode MS,arial,verdana,_sans?
??? [ad_video_pub_id] => ca-pub-6219811747049371?
??? [watermark] =>,http://s.ytimg.com/yts/img/watermark/youtube_watermark-vflHX6b6E.png,http://s.ytimg.com/yts/img/watermark/youtube_hd_watermark-vflAzLcD6.png?
??? [iurlmq] => http://i1.ytimg.com/vi/psvkyf3PzjE/mqdefault.jpg?
??? [ad_flags] => 0?
??? [iv3_module] => 1?
??? [ldpj] => -14?
??? [sffb] => True?
??? [vid] => psvkyf3PzjE?
??? [ad_host_tier] => 5437415?
??? [cid] => 7379?
??? [status] => ok?
??? [thumbnail_url] => http://i1.ytimg.com/vi/psvkyf3PzjE/default.jpg?
??? [muted] => 0?
??? [iv_module] => http://s.ytimg.com/yts/swfbin/player-vflq0-BLs/iv_module.swf?
??? [oid] => 5ktxztP0i_DArnZizBrNwg?
??? [fexp] => 902408,903802,924213,924217,924222,930008,934024,934030,950844?
??? [subtitles_xlb] => http://s.ytimg.com/yts/xlbbin/subtitles-strings-zh_HK-vflo2gkEm.xlb?
??? [mpvid] => OeTh0jm40F5BmeEA?
??? [midroll_prefetch_size] => 1?
??? [shortform] => True?
??? [token] => vjVQa1PpcFMd5fXZSBDDaOaa__9y5Uc-2YlgFz_9NsQ=?
??? [vq] => auto?
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)