mp3.php

<?php 
class mp3{
    var $str;
    var $time;
    var $frames;

    // Create a new mp3
    function mp3($path="")
    {
    if($path!="")
        {
        $this->str = file_get_contents($path);
        }
    }

    // Put an mp3 behind the first mp3
    function mergeBehind($mp3){
        $this->str .= $mp3->str;
    }

    // Calculate where's the end of the sound file
    function getIdvEnd(){
        $strlen = strlen($this->str);
        $str = substr($this->str,($strlen-128));
        $str1 = substr($str,0,3);
        if(strtolower($str1) == strtolower('TAG')){
            return $str;
        }else{
            return false;
        }
    }

    // Calculate where's the beginning of the sound file
    function getStart(){
        $strlen = strlen($this->str);
        for($i=0;$i<$strlen;$i++){
            $v = substr($this->str,$i,1);
            $value = ord($v);
            if($value == 255){
                return $i;
            }
        }
    }

    // Remove the ID3 tags
    function striptags(){
        //Remove start stuff...
        $newStr = '';
        $s = $start = $this->getStart();
        if($s===false){
            return false;
        }else{
            $this->str = substr($this->str,$start);
        }
        //Remove end tag stuff
        $end = $this->getIdvEnd();
        if($end!==false){
            $this->str = substr($this->str,0,(strlen($this->str)-129));
        }
    }

    // Display an error
    function error($msg){
        //Fatal error
        die('<strong>audio file error: </strong>'.$msg);
    }

     // Send the new mp3 to the browser
    function output($path){
        //Output mp3
        //Send to standard output
        if(ob_get_contents())
            $this->error('Some data has already been output, can\'t send mp3 file');
        if(php_sapi_name()!='cli'){
            //We send to a browser
            header('Content-Type: audio/mpeg3');
            if(headers_sent())
                $this->error('Some data has already been output to browser, can\'t send mp3 file');
            header('Content-Length: '.strlen($this->str));
            header('Content-Disposition: attachment; filename="'.$path.'"');
        }
    echo $this->str;
    return '';
    }
}