PHP array Encoding and Decoding:Need a function for encoding and decoding string or array with delimiters or array itself

I am in a need of function that will encode and decode all the id's of a tree nodes. I function that will check if its a single string or array string or string with delimiters. I am having one plugin for encoding and decoding. here goes my plugin:

FIle: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'开发者_高级运维>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;

    }

}

?>

By using the functions from this plugin I have to write a function to check for different conditions.

I wrote you a prototype for an extended class from this base class. Not sure what $PatternFlip is for, its not accessible in this class so you'll have to change it as you see necessary. If you want the result in a different format you can add functions to the class.

class MyProtector extends Protector {

var $Object;
var $encode;//1 means encode, not 1 means decode
var $result;

function __MyProtector($obj="",$encode=0,$pattern="") {
   $this->$Object=$obj;
   if($encode){//encode object
       $this->$EncodePattern=$pattern;
       $this->$result=smartEncode($obj);
   }else{//decode object
       $this->$DecodePattern=$pattern;
       $this->result=smartDecode($obj);
}
}

private function smartEncode($object){
   //encodes string or array
   if(is_array($object){
       return encodeArray($object);
   }else if(is_string($object)){
       return encodeString($object);
   }

   return 0;

}

private function smartDecode($object){
   //encodes string or array
   if(is_string($object)&&strpos("&",$object)===1){
       return encodeDelimiter($object);
   }else if(is_string($object)){
       return encodeString($object);
   }

   return 0;

}
private function decodeDelimiter($object){
   $a=explode("&",$string);//will only work if your encoding does not include "&"!
   $aDecoded=array();
   $k=0; 
   foreach($a as $i){
     $this->toDecode=$i;
     $aDecoded[$k]=$this->Decode();
     $k++;          
   }
   return $aDecoded;


}

private function decodeString($s){
$this->toDecode=$s;
    return $this->Decode();
}

private function encodeString($s){
   $this->toEncode=$s;
   return $this->Encode();
}

private function encodeArray($s){
   foreach($s as $i){
  $this->toEncode=$i;
      $s=$s.$this->Encode()."&";
   }
   return $s;
}
//setters and getters
function getPattern(){
   return $this->Pattern;
}

function getPatternFlip(){
    return $this->Pattern;
}   
function getPattern(){
    return $this->Pattern;
}

//..etc

Example usage:

$o=new MyProtector($string,0,$pattern);
echo $o->$result; //returns encoded string
$o=new MyProtector($string,1,$pattern);
echo $o->$result; //returns decoded string
$o=new MyProtector($array,0,$pattern);
echo $o->$result; //returns decoded string with '&' inbetween encoded array entries
$o=new MyProtector($stringWithDelimiter,1,$pattern);
echo $o->$result;//returns decoded array

I'm sure there will be a few syntax errors, typos in there as I haven't compiled/tried the thing. Hope that helped.