[RESOLVED] code encryption in PHP

[veena das]

Hi All,

I have written encode() in php for string.

below is code
//

<? 
function encode($str){
    $alph=array("a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z");
    $iLen = strlen(strtolower($str));
    $sTemp = "";
    $ival=0;

        for($i=1; $i <=$iLen;$i++){
            $sAsc = ord(substr($str, $i, 1));
            $sAscLen = strlen($sAsc);

                switch($sAscLen)
                                                {
                case $sAscLen=0;
                $sAsc = "000";
                break;

                case $sAscLen=1;
                $sAsc = "00" . $sAsc;
                break;

                case $sAscLen=2;
                $sAsc = "0" . $sAsc;
                break;

                default:
                $sAsc = $sAsc;
                }
    
                    $ival=$ival+round(($i / 3),0);

                    if($ival > 25 || $ival < 0){$ival = 0;}

                    if($ival < 10){ 
                        $sTemp = $sTemp . $sAsc .  $alph[$ival + 2];
                    }else{
                        $sTemp = $sTemp . $sAsc;
                    }
        }
    return $sTemp;
    }

?>

//decode function

<? 
      function decode($str){    
        
    $alph=array("a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z");
    $sTemp = "";
        for($i=0; $i <=25;$i++){
            $str=str_replace(chr($i),"",$str);
        }

        $iLen = strlen($str);
        for($k=0; $k<$iLen; $k+=3){
            $sTemp = $sTemp . chr(substr($str, $k, 3));
                    }        

        return $sTemp;
    }
?>

decode function is not working..it's not giving proper output.