<?php

function mutator($str,$int){
//echo "in mutator \n";
//takes in a string and mutates it $int times. 
	for ($i = 0; $i <= $int; $i++){
		
		$pos = rand(0,strlen($str));
		
		if (substr($str,$pos,1) =='0' ){
			$str = 	substr_replace($str,'1', $pos,1);
		}else{
			$str =	substr_replace($str,'0', $pos,1);
		}//end of if
	}//end of for

	if (strlen($str) > 24){
		$str = substr($str,0,24);
	}
	$str = str_pad($str,24,"0");	
	return $str;
}

?>