Location: PHPKode > scripts > JPEncodeClass > jpencodeclass/encode.class.php
<?php

/*-------------------------
Author: Jonathan Pulice
Date: July 26th, 2005
Name: JPEncodeClass v1
Desc: Encoder and decoder using patterns.
-------------------------*/

class Protector
{

	var $Pattern = "";
	var $PatternFlip = "";
	var $ToEncode = "";
	var $ToDecode = "";
	var $Decoded = "";
	var $Encoded = "";
	var $Bug = false;
	var $DecodePattern = "";
	
	function Debug($on = true)
	{
		$this->Bug = $on;
	}

	function Encode()
	{


    	$ar = explode(":", $this->Pattern);
		$enc = $this->ToEncode;

        if ($this->Bug) echo "<!-- BEGIN ENCODING -->\n";

    	foreach ($ar as $num => $ltr)
    	{   
			switch ($ltr)
    		{
				case "E":
    		    	$enc = base64_encode($enc);
    		    	break;
    		    case "D":
    		    	$enc = base64_decode($enc);
    		    	break;
    		    case "R":
    		    	$enc = strrev($enc);
    		    	break;
    		    case "I":
    		    	$enc = $this->InvertCase($enc);
    		    	break;
    		}
    		if ($this->Bug) echo "<!--     {$ltr}: {$enc}  -->\n";
    	}

        if ($this->Bug) echo "<!-------------------->\n\n";

		$this->Encoded = ($enc == $this->Str) ? "<font color='red'>No Encoding/Decoding Pattern Detected!</font>" : $enc;

		return $this->Encoded;

	}
	
	function Decode()
	{
		
		$pattern = ($this->DecodePattern != "") ? $this->DecodePattern : $this->Pattern;

		//Reverse the pattern
		$this->PatternFlip($pattern);

		//make into an array
		$ar = explode(":", $this->PatternFlip);

		$t = ($this->Encoded == "") ? $this->ToDecode : $this->Encoded;

		if ($this->Bug) echo "<!-- BEGIN DECODING -->\n";

        foreach ($ar as $num => $ltr)
    	{
			switch ($ltr)
    		{
				case "E":
    		    	$t = base64_encode($t);
    		    	break;
    		    case "D":
    		    	$t = base64_decode($t);
    		    	break;
    		    case "R":
    		    	$t = strrev($t);
    		    	break;
    		    case "I":
    		    	$t = $this->InvertCase($t);
    		    	break;
    		}
    		if ($this->Bug) echo "<!--     {$ltr}: {$t}  -->\n";
    	}

        if ($this->Bug) echo "<!-------------------->\n\n";

    	$this->Decoded = ($t == $this->Encoded) ? "<font color='red'>No Encoding/Decoding Pattern Detected!</font>" : $t;

    	return $this->Decoded;

	}

	function MakePattern($len = 10)
	{
		//possible letters
		// E - Base64 Encode
		// R - Reverse String
		// I - Inverse Case
		$poss = array('E','R', 'I');

		//generate a string
		for ( $i = 0 ; $i < $len ; $i++ )
		{
			$tmp[] = $poss[ rand(0,2) ];
		}

		//echo $str. "<br>";
		//fix useless pattern section  RR  II
		$str = implode(":", $tmp);

		//fix
		$str = str_replace( 'R:R:R:R:R:R' , 'R:E:R:E:R:E' , $str );
		$str = str_replace( 'R:R:R:R:R' , 'R:E:R:E:R' , $str );
		$str = str_replace( 'R:R:R:R' , 'R:E:R:E' , $str );
		$str = str_replace( 'R:R:R' , 'R:E:R' , $str );
		$str = str_replace( 'R:R' , 'R:E' , $str );
		
		//fix
		$str = str_replace( 'I:I:I:I:I:I' , 'I:E:I:E:I:E' , $str );
		$str = str_replace( 'I:I:I:I:I' , 'I:E:I:E:I' , $str );
		$str = str_replace( 'I:I:I:I' , 'I:E:I:E' , $str );
		$str = str_replace( 'I:I:I' , 'I:E:I' , $str );
		$str = str_replace( 'I:I' , 'I:E' , $str );

		//string is good, set as pattern
		$this->Pattern = $str;
		return $this->Pattern; //if we need it

	}

	function PatternFlip($pattern)
	{
        //reverse the pattern
    	$str = strrev($pattern);

    	$ar = explode(":", $str);

    	foreach ($ar as $num => $ltr)
    	{   
			switch ($ltr)
    		{
				case "E":
    		    	$tmp[] = "D";
    		    	break;
    		    case "D":
    		    	$tmp[] = "E";
    		    	break;
    		    case "R":
    		    	$tmp[] = "R";
    		    	break;
    		    case "I":
    		    	$tmp[] = "I";
    		    	break;
    		}

    	}

		$rev = implode(":", $tmp);

		$this->PatternFlip = $rev;

		return $this->PatternFlip;
	}

	// This is my custom Case Invertor!
	//   if you would like to use this in a script, please credit it to me, thank you
	function InvertCase($str)
	{
		//Do initial conversion
		$new = strtoupper( $str );

    	//spluit into arrays
		$s = str_split( $str );
 		$n = str_split( $new );

		//now we step through each letter, and if its the same as before, we swap it out
		for ($i = 0; $i < count($s); $i++)
		{
			if ( $s[$i] === $n[$i] ) //SWAP THE LETTER
			{
				//ge the letter
				$num = ord( $n[$i] );

				//see if the ord is in the alpha ranges ( 65 - 90 | 97 - 122 )
                if ( ( $num >= 65 AND $num <= 90 ) OR ( $num >= 97 AND $num <= 122 ) )
                {
    				if ($num < 97 ) { $num = $num + 32; }
    				else { $num = $num - 32; }

    				$newchr = chr($num);

    				$n[$i] = $newchr;
  				}
			}
		}

		//join the new string back together
		$newstr = implode("", $n);

		return $newstr;

	}

}

?>
Return current item: JPEncodeClass