[php - mp3] Leggere/Scrivere tag ID3 senza libreria "getID3"

[marmz]

Allora:
il mio hosting non fornisce il modulo "getID3" per php...

E' possibile includere i sorgenti della libreria e usare le funzioni id3, anche se non si possiede il modulo?

Altrimenti, esistono delle funzioni "ad hoc" per elaborare i tag dei file mp3, senza usare "getID3"?

Ciao, thx!

[marmz]

Bene.. ho trovato questa "classuccia", che implementa metodi per leggere i tag ID3..
(per scriverlI, invece, la vedo male.. )

class ID3{


   var $file_name=''; //full path to the file
                         //the sugestion is that this path should be a
                      //relative path
   var $tags;   //array with ID3 tags extracted from the file
   var $last_error_num=0; //keep the number of the last error ocurred
   var $tags_count = 0; // the number of elements at the tags array
   /*********************/
   /**private functions**/
   /*********************/


   function hex2bin($data) {
   //thankz for the one who wrote this function
   //If iknew your name I would say it here
      $len = strlen($data);
      for($i=0;$i<$len;$i+=2) {
         $newdata .= pack("C",hexdec(substr($data,$i,2)));
      }
   return $newdata;
   }
   
   function get_frame_size($fourBytes){
      $tamanho[0] = str_pad(base_convert(substr($fourBytes,0,2),16,2),7,0,STR_PAD_LEFT);
      $tamanho[1] = str_pad(base_convert(substr($fourBytes,2,2),16,2),7,0,STR_PAD_LEFT);
      $tamanho[2] = str_pad(base_convert(substr($fourBytes,4,2),16,2),7,0,STR_PAD_LEFT);
      $tamanho[3] = str_pad(base_convert(substr($fourBytes,6,2),16,2),7,0,STR_PAD_LEFT);
      $total =    $tamanho[0].$tamanho[1].$tamanho[2].$tamanho[3];
      $tamanho[0] = substr($total,0,8);
      $tamanho[1] = substr($total,8,8);
      $tamanho[2] = substr($total,16,8);
      $tamanho[3] = substr($total,24,8);
      $total =    $tamanho[0].$tamanho[1].$tamanho[2].$tamanho[3];
        $total = base_convert($total,2,10);
       return $total;
    }
    
   function extractTags($text,&$tags){
      $size = -1;//inicializando diferente de zero para nгo sair do while
       while ((strlen($text) != 0) and ($size != 0)){
      //while there are tags to read and they have a meaning
       //while existem tags a serem tratadas e essas tags tem conteudo
            $ID    = substr($text,0,4);
          $aux   = substr($text,4,4);
         $aux   = bin2hex($aux);
         $size  = $this->get_frame_size($aux);
         $flags = substr($text,8,2);
         $info  = substr($text,11,$size-1);
         if ($size != 0){
            $tags[$ID] = $info;
            $this->tags_count++;
         }
         $text = substr($text,10+$size,strlen($text));
       }
   }
   
   /********************/
   /**public functions**/
   /********************/
   /**Constructor**/


   function ID3($file_name){
      $this->file_name = $file_name;
      $this->last_error_num = 0;
   }
   
   /**Read the file and put the TAGS
   content on $this->tags array**/
   function getInfo(){
        if ($this->file_name != ''){
            $mp3 = @fopen($this->file_name,"r");
           $header = @fread($mp3,10);
         if (!$header) {
             $this->last_error_num = 2;
            return false;
            die();
         }
           if (substr($header,0,3) != "ID3"){
             $this->last_error_num = 3;
            return false;
              die();
           }
           $header = bin2hex($header);
           $version = base_convert(substr($header,6,2),16,10).".".base_convert(substr($header,8,2),16,10);
           $flags = base_convert(substr($header,10,2),16,2);
           $flags = str_pad($flags,8,0,STR_PAD_LEFT);
           if ($flags[7] == 1){
               //echo('with Unsynchronisation<br>');
           }
           if ($flags[6] == 1){
               //echo('with Extended header<br>');
           }
           if ($flags[5] == 1){//Esperimental tag
            $this->last_error_num = 4;
            return false;
              die();
           }
           $total = $this->get_frame_size(substr($header,12,8));
         $text = @fread($mp3,$total);
           fclose($mp3);
         $this->extractTags($text,$this->tags);
      }
      else{
         $this->last_error_num = 1;//file not set
         return false;
          die();
      }
       return true;
   }
   
   /*************
   *   PUBLIC
   * Functions to get information
   * from the ID3 tag
   **************/
   function getArtist(){
      if (array_key_exists('TPE1',$this->tags)){
          return $this->tags['TPE1'];
      }else{
          $this->last_error_num = 5;
         return false;
      }
   }
   
   function getTrack(){
      if (array_key_exists('TRCK',$this->tags)){
          return $this->tags['TRCK'];
      }else{
          $this->last_error_num = 5;
         return false;
      }
   }
   
   function getTitle(){
      if (array_key_exists('TIT2',$this->tags)){
          return $this->tags['TIT2'];
      }else{
          $this->last_error_num = 5;
         return false;
      }
   }
   
   function getAlbum(){
      if (array_key_exists('TALB',$this->tags)){
          return $this->tags['TALB'];
      }else{
          $this->last_error_num = 5;
         return false;
      }
   }
   
   function getYear(){
      if (array_key_exists('TYER',$this->tags)){
          return $this->tags['TYER'];
      }else{
          $this->last_error_num = 5;
         return false;
      }
   }
   
   function getGender(){
      if (array_key_exists('TCON',$this->tags)){
          return $this->tags['TCON'];
      }else{
          $this->last_error_num = 5;
         return false;
      }
   }
   
}

esempio di utilzzo:

$filename="../mp3test/queen/1/14 - Flash.mp3";


$myId3 = new ID3($filename);


if ($myId3->getInfo())
 {  
    $data['title']=$myId3->getTitle();       
    $data['artist']=$myId3->getArtist();
    $data['track']=$myId3->getTrack();       
    $data['album']=$myId3->getAlbum();


 }
 
print '<pre>';
print_r($data);
print '</pre>';

risultato:

Array
(
    [title] => Flash
    [artist] => Queen
    [track] => 14
    [album] => Greatest Hits
)

Magari può esservi utile ..
Se avete idea di come implementare i metodi per la scrittura dei tag sul file, ve ne sarò eternamente grato!

[Santino83_02]

http://getid3.sourceforge.net/ questa dice che può anche scrivere anche se dice che non supporta tutti i formati e potrebbe essere difettosa. da usare con cautela. altra roba non ne vedo, a meno di non andare a roba del 2009. Cambiare hosting no?