filesize() stat failed for function to get ID3 tags of MP3 file

It works with local files but n开发者_如何学Cot with external domains. Here's my code (which I got from http://www.barattalo.it/2010/02/22/reading-mp3-informations-with-php-id3-tags/):

<?
function tagReader($file){
$id3v23 = array("TIT2","TALB","TPE1","TRCK","TDRC","TLEN","USLT");
$id3v22 = array("TT2","TAL","TP1","TRK","TYE","TLE","ULT");
$fsize = filesize($file);
$fd = fopen($file,"r");
$tag = fread($fd,$fsize);
$tmp = "";
fclose($fd);
if (substr($tag,0,3) == "ID3") {
    $result['FileName'] = $file;
    $result['TAG'] = substr($tag,0,3);
    $result['Version'] =    hexdec(bin2hex(substr($tag,3,1))).".".hexdec(bin2hex(substr($tag,4,1)));
}
if($result['Version'] == "4.0" || $result['Version'] == "3.0"){
    for ($i=0;$i<count($id3v23);$i++){
        if (strpos($tag,$id3v23[$i].chr(0))!= FALSE){
            $pos = strpos($tag, $id3v23[$i].chr(0));
            $len = hexdec(bin2hex(substr($tag,($pos+5),3)));
            $data = substr($tag, $pos, 10+$len);
            for ($a=0;$a<strlen($data);$a++){
                $char = substr($data,$a,1);
                if($char >= " " && $char <= "~") $tmp.=$char;
            }
            if(substr($tmp,0,4) == "TIT2") $result['Title'] = substr($tmp,4);
            if(substr($tmp,0,4) == "TALB") $result['Album'] = substr($tmp,4);
            if(substr($tmp,0,4) == "TPE1") $result['Author'] = substr($tmp,4);
            if(substr($tmp,0,4) == "TRCK") $result['Track'] = substr($tmp,4);
            if(substr($tmp,0,4) == "TDRC") $result['Year'] = substr($tmp,4);
            if(substr($tmp,0,4) == "TLEN") $result['Length'] = substr($tmp,4);
            if(substr($tmp,0,4) == "USLT") $result['Lyric'] = substr($tmp,7);
            $tmp = "";
        }
    }
}
if($result['Version'] == "2.0"){
    for ($i=0;$i<count($id3v22);$i++){
        if (strpos($tag,$id3v22[$i].chr(0))!= FALSE){
            $pos = strpos($tag, $id3v22[$i].chr(0));
            $len = hexdec(bin2hex(substr($tag,($pos+3),3)));
            $data = substr($tag, $pos, 6+$len);
            for ($a=0;$a<strlen($data);$a++){
                $char = substr($data,$a,1);
                if($char >= " " && $char <= "~") $tmp.=$char;
            }
            if(substr($tmp,0,3) == "TT2") $result['Title'] = substr($tmp,3);
            if(substr($tmp,0,3) == "TAL") $result['Album'] = substr($tmp,3);
            if(substr($tmp,0,3) == "TP1") $result['Author'] = substr($tmp,3);
            if(substr($tmp,0,3) == "TRK") $result['Track'] = substr($tmp,3);
            if(substr($tmp,0,3) == "TYE") $result['Year'] = substr($tmp,3);
            if(substr($tmp,0,3) == "TLE") $result['Lenght'] = substr($tmp,3);
            if(substr($tmp,0,3) == "ULT") $result['Lyric'] = substr($tmp,6);
            $tmp = "";
        }
    }
}
return $result;
}
$song = tagReader("file.mp3");
echo $song[Title];
?>

It works only with local files. You cant pass remote mp3 file as parameter of this function and that is senseless. Files open with fopen() so they must be local files. Same thing for filesize().

  $fsize = filesize($file);
  $fd = fopen($file,"r");

What exactly you want to load with this function? What do you mean with "It doesn't work with external domains"?

This line should work only with file.mp3 stored in same directory as this script.

  $song = tagReader("file.mp3");

If you can't read local file, than you should check READ permission for that file.

Same reason why filesize() probably don't work.

Suggestion: You should use quotes for alphanumeric array indexes...

  echo $song['Title']; // or 
  echo $song["Title"];

instead of

  echo $song[Title];

Yes, it probably works, but still, you should not do that. I suggest using single quotes to avoid evaluation of variable names in some specific cases (as array indexes such as $array['$index']).