$img="0021.JPG"; 
    if($exif = exif_read_data($img, 0, true))  
    { 
       foreach ($exif as $key => $section)  
       {        
          foreach ($section as $name => $value) 
          { 
              $exif_tab[$name]= $value; 
          } 
       }                                 
    } 

         $titre=$exif_tab[???];