[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.

[CornedBee]

You have written the encode function and don't know how to write the decoder? I have a hard time believing that.

Anyway, first you didn't use code tags. That makes your code as posted very unreadable. Second, the function would be unreadable even if it was properly formatted.
It's barely readable enough to see that your switch is completely broken.

Anyway, why don't you provide a description of how you encode the string? Then we can give suggestions as how to decode it.

[veena das]

I have written decode() also. but it's not working..dat's why i asked for d decode().
//

<?
        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);
// die("--".$iLen);
for($k=0; $k<$iLen; $k+=3){
$sTemp = $sTemp . chr(substr($str, $k, 3));
} 


return $sTemp;
}

?>

[CornedBee]

[code]Use CODE tags![/code]

[superbovine]

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


return $sTemp;
}

dude...you should be coding like this...

				
		function remove_escape($data) { //removes quotes and slashes
			global $dbc;
			
			if (ini_get('magic_quote_gpc')) {		
				$data = stripslashes($data);
			}//end if
			
			return mysql_real_escape_string($data,$dbc);
		}//end remove_slashes

[CornedBee]

You're missing the point. The code tags preserve the indentation of your code. I don't read code without indentation. Just wrapping the poorly formatted code inside code tags doesn't help.

[superbovine]

yeah yeah i was editing the post already, I didn't have an example

[CornedBee]

Ah, sorry, thought you were the OP.

[veena das]

Hi superbovine !!

I tried you code, but it's no working and actually i'm not getting your code. I'm new to PHP. I tried to write decode(). is there any mistake in my code? it's not giving proper output. all syntax are ok?

[CornedBee]

It was an example of formatting. The functionality was unrelated to your problem.

[veena das]

To
CornedBee ,

I knew it was an example and i was not trying it with my code.
plz, reply to post if u really want to give any solution..don post only suggestions, give solutions..I don want your suggestions. Plz don reply to my Posts

[CornedBee]

Very well. I shall never reply to your posts again and add you to my ignore list.

[penagate]

So you're basically saying "don't help, just do it for me".

You know, some of us had to, like, learn how to program; not just how to post 'givc0d4meplzkthx'.

[visualAd]

To
CornedBee ,

I knew it was an example and i was not trying it with my code.
plz, reply to post if u really want to give any solution..don post only suggestions, give solutions..I don want your suggestions. Plz don reply to my Posts

I can see the problem with your function. It is not working properly.


Hope this helps!!!

[veena das]

So you're basically saying "don't help, just do it for me".

You know, some of us had to, like, learn how to program; not just how to post 'givc0d4meplzkthx'.

No, it's no like dat I don want any suggestion or help, but I had replied to
superbovine and I was knowing it was an example. so I was expecting reply from superbovine.

[rasana]

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.

========================================================
Hi Veena,

your encode() and decode() are correct but make small change in encode() function at the last part in the else statement.. if..else statement should be

if($ival < 15)
{ 
   $sTemp = $sTemp . $sAsc .  $alph[$ival + 2];
}else
{
   $sTemp = $sTemp . $sAsc . $alph[2];
} 

make small change in decode() also, in the following part of code

for($k=0; $k<$iLen; $k+=4)
{
$sTemp = $sTemp . chr(substr($str, $k, 3));
                    } 

hope this works

[veena das]

========================================================
Hi Veena,

your encode() and decode() are correct but make small change in encode() function at the last part in the else statement.. if..else statement should be

if($ival < 15)
{ 
   $sTemp = $sTemp . $sAsc .  $alph[$ival + 2];
}else
{
   $sTemp = $sTemp . $sAsc . $alph[2];
} 

make small change in decode() also, in the following part of code

for($k=0; $k<$iLen; $k+=4)
{
$sTemp = $sTemp . chr(substr($str, $k, 3));
                    } 

hope this works

Hi, yes I made changes in code and it worked. Thanks