AcidicChip's MP3 ID3v2 Tag Writer 1.0

				
//**************************************
// Name: AcidicChip's MP3 ID3v2 Tag Writer 1.0
// Description:This script will take an MP3 file, with the ID3v2 Tags you want and output them into a single MP3 file to download. This script will *NOT* edit the MP3 file itself.
// By: AcidicChip
//
//This code is copyrighted and has// limited warranties.Please see http://www.Planet-Source-Code.com/vb/scripts/ShowCode.asp?txtCodeId=710&lngWId=8//for details.//**************************************

<?
	// Script Name: AcidicChip's MP3 ID3v2 Tag Writer 1.0
	//
	// Script Author: Chance O. One (acidicchip@acidicchip.com)
	//
	// Script Description: This script will take an MP3 file, with the ID3v2 Tags you want and output them into 
	// a single MP3 file to download. This script will *NOT* edit the MP3 file itself. If 
	// you wish to make this script write the tags to the physical file, instead of the file 
	// that it outputs to download, you will have to make the changes yourself. Please do 
	// not e-mail me, asking me how to do it. Feel free to e-mail me, and let me know of 
	// any bugs it may have.
	//
	// Author's Note: I tried to make this script as easy as possible, so that even newbies can understand it.
	//But if there is something that you don't understand, go ahead and e-mail me, and I'll 
	//help you understand it the best I can. 
	
	// Change the line below to the path of your MP3 file. eg: $MP3 = "music/mp3/file.mp3";
	$MP3 = "TetrisXP.mp3";
	
	// The function below is a reverse function of bin2hex. It will convert hex to binary.
	function hex2bin($data) {
		$len = strlen($data);
		for($i=0;$i<$len;$i+=2) {
			$newdata .= pack("C",hexdec(substr($data,$i,2)));
		}
		return $newdata;
	}
	
	// Change the variable values below to what you want for the ID3v2 Tags.
	$TrackNum = "01";
	$Title = "This is the title";
	$Artist	= "This is the artist";
	$Album = "This is the album";
	$Year = "2002";
	$Genre = "This is the genre";
	$Comment = "This is the comment";
	$Composer = "This is the composer";
	$OrigArtist = "This is the original artist";
	$Copyright = "This is the copyright";
	$URL = "This is the url";
	$EncodedBy = "This is the encoded by";
	
	// The variables below are converting the values you entered for the tags (above) into hex, in order to 
	// have a better reassurance that your MP3 won't sound funny.
	$TrackNumHEX = bin2hex($TrackNum);
	$TitleHEX = bin2hex($Title);
	$ArtistHEX	= bin2hex($Artist);
	$AlbumHEX = bin2hex($Album);
	$YearHEX = bin2hex($Year);
	$GenreHEX = bin2hex($Genre);
	$CommentHEX = bin2hex($Comment);
	$ComposerHEX = bin2hex($Composer);
	$OrigArtistHEX = bin2hex($OrigArtist);
	$CopyrightHEX = bin2hex($Copyright);
	$URLHEX = bin2hex($URL);
	$EncodedByHEX = bin2hex($EncodedBy);
	
	// The variables below are creating a hex value for the length of each of the values you entered for the 
	// tags (above).
	$TrackNumLenHEX = bin2hex(chr((strlen($TrackNum) + 1)));
	$TitleLenHEX = bin2hex(chr((strlen($Title) + 1)));
	$ArtistLenHEX	= bin2hex(chr((strlen($Artist) + 1)));
	$AlbumLenHEX = bin2hex(chr((strlen($Album) + 1)));;
	$YearLenHEX = bin2hex(chr((strlen($Year) + 1)));;
	$GenreLenHEX = bin2hex(chr((strlen($Genre) + 1)));
	$CommentLenHEX = bin2hex(chr((strlen($Comment) + 5)));
	$ComposerLenHEX = bin2hex(chr((strlen($Composer) + 1)));
	$OrigArtistLenHEX = bin2hex(chr((strlen($OrigArtist) + 1)));
	$CopyrightLenHEX = bin2hex(chr((strlen($Copyright) + 1)));
	$URLLenHEX = bin2hex(chr((strlen($URL) + 2)));
	$EncodedByLenHEX = bin2hex(chr((strlen($EncodedBy) + 1)));
	
	// The lines below is the creation of the ID3v2 tags. The tags are usually in this hex format:
	// XXXXXXXX000000YY0000ZZZZZZZZZZZZZZZZZZZZ
	// X = The marking for the tag, telling the MP3 player that this tag is right here
	// Y = The length of the text inputted for the tag (Usually +1)
	// Z = The content of the tag
	$Data = "49443303000000000E7A";
	$Data .= "5452434B000000" . $TrackNumLenHEX . "000000" . $TrackNumHEX;
	$Data .= "54454E43000000" . $EncodedByLenHEX . "400000" . $EncodedByHEX;
	$Data .= "57585858000000" . $URLLenHEX . "00000000" . $URLHEX;
	$Data .= "54434F50000000" . $CopyrightLenHEX . "000000" . $CopyrightHEX;
	$Data .= "544F5045000000" . $OrigArtistLenHEX . "000000" . $OrigArtistHEX;
	$Data .= "54434F4D000000" . $ComposerLenHEX . "000000" . $ComposerHEX;
	$Data .= "434F4D4D000000" . $CommentLenHEX . "00000000000000" . $CommentHEX;
	$Data .= "54434F4E000000" . $GenreLenHEX . "000000" . $GenreHEX;
	$Data .= "54594552000000" . $YearLenHEX . "000000" . $YearHEX;
	$Data .= "54414C42000000" . $AlbumLenHEX . "000000" . $AlbumHEX;
	$Data .= "54504531000000" . $ArtistLenHEX . "000000" . $ArtistHEX;
	$Data .= "54495432000000" . $TitleLenHEX . "000000" . $TitleHEX;
	
	// The ID3v2 Tags are EXACTLY 2048 bytes, no matter what. The lines below are filling in the remaining 2048 
	// bytes (4096 HEX character).
	$FillIn = (4096 - strlen($Data));
	$Data .= str_repeat("0", $FillIn);
	
	// The lines below are checking to see if an ID3v2 tag already exists in the MP3.
	$MusicFile = fopen($MP3, "r");
	If (fread($MusicFile, 3) == "ID3") {
		// If the ID3v2 tag does exist, this line tells it to start the file read after 2048 bytes (The length 
		// of the ID3v2 tags.)
		fseek($MusicFile, 2048);
	}
	
	// The line below is converting the tags from HEX to binary.
	$FinalOutput = hex2bin($Data);
	
	// The line below is telling your browser that the data that is going to be sent is an MP3 file to download 
	// (or play)
	header("Content-Type: audio/mp3");
	
	// The line below is uploading your ID3v2 tags.
	echo($FinalOutput);
	// The line below is uploading your MP3 file right after the tags (both are being sent as one file)
	echo(fread($MusicFile,FileSize($MP3)));
	
	fclose($MusicFile);
?>