使用php读取远程mp3文件信息

Question

I am working on a site which will fetch mp3 details from a remote url. I need to write a cron job so that it gets all the song information such as the file name, path, artist, genre, bitrate, playing time, etc and put it in a database table.

I tried getid3 package, but this is very slow when fetching more than one url at a time and I get maximum execution error.

Example:

require_once('getid/getid3/getid3.php');

    $urls = array ('http://stackoverflow.com/test1.mp3','http://stackoverflow.com/test2.mp3''http://stackoverflow.com/test3.mp3');


    foreach($urls  as $ur){
      $mp3_det = getMp3Info( $ur );
      print_r ($mp3_det);

    }

    function getMp3Info ( $url ){
            if($url){
            /**********/
            $filename = tempnam('/tmp','getid3');
            if (file_put_contents($filename, file_get_contents($url, false, null, 0, 35000))) {
               if (require_once('getid/getid3/getid3.php')) {
                  $getID3 = new getID3;
                  $ThisFileInfo = $getID3->analyze($filename);
                  unlink($filename);
                  $bitratez = $ThisFileInfo[audio][bitrate] ? $ThisFileInfo[audio][bitrate] : '';
                  $headers = get_headers($url, 1);
                  if ((!array_key_exists("Content-Length", $headers))) { return false; }
                 // print $headers["Content-Length"];
                  $filesize= round($headers["Content-Length"]/1000);
                  $contentLengthKBITS=$filesize*8;
                  if ( $bitratez ){
                         $bitrate= round ( $bitratez/1000 );
                        $seconds=$contentLengthKBITS/$bitrate;
                        $playtime_mins = floor($seconds/60);
                        $playtime_secs = $seconds % 60;

                         if(strlen($playtime_secs)=='1'){$zero='0';}
                        $playtime_secs = $zero.$playtime_secs;
                        $playtime_string=$playtime_mins.':'.$playtime_secs;
                    }
                    else $playtime_string='0:00';

                 // echo '<pre>'.print_r($ThisFileInfo, true).'</pre>';
               }

               $bitrate = $bitrate ? $bitrate : 0;

                $ret = array();
                $ret['playtime'] = $playtime_string;
                $ret['filesize'] = $filesize;
                $ret['bitrate']  = $bitrate;

               return $ret;
            }
        }

Answer 1

MP3 files comes along with some kind of Meta Data almost same way to some other binary file formats. They are in ID tags. There are many versions of ID tags, like ID3 or ID4 tags. Now, there is easy way to extract IDv3 tag informations supplied along with MP3 file, through PHP.

You need to download some library in PHP from sourceforge, like getID3. This way you can extract artist name, genre, duration, length, size etc information from an mp3 file. IDv4 contains additional informations such as album art.