问题
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PHP array Encoding and Decoding:Need a function for encoding and decoding string or array with delimiters or array itself…
hi. i am new to php. i need to write two separate functions for encoding and decoding of multidimensional arrays in php. i have attached one plugin .......... 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;
}
}
?>............
from this plugin i need to use the encode and decode functions in my functions for pattern checking. If anybody can help me.......It ll be good for me.coz i am in need of it........
回答1:
Use serialize() and unserialize() to turn the arrays into strings and back into arrays (also works with everything else except resources)
回答2:
seems like a pretty large encoder/decoder class.
maybe this RC4 algorithm would be easier
//encrypt
$encrypted = RC4Crypt::encrypt('your key','some string to encrypt');
//decrypt
$decrypted = RC4Crypt::encrypt('your key',$encrypted);
//The RC4 Class
class RC4Crypt {
function encrypt ($pwd, $data){
$key[] = '';
$box[] = '';
$pwd_length = strlen($pwd);
$data_length = strlen($data);
for ($i = 0; $i < 256; $i++){
$key[$i] = ord($pwd[$i % $pwd_length]);
$box[$i] = $i;
}
for ($j = $i = 0; $i < 256; $i++){
$j = ($j + $box[$i] + $key[$i]) % 256;
$tmp = $box[$i];
$box[$i] = $box[$j];
$box[$j] = $tmp;
}
$cipher = '';
for ($a = $j = $i = 0; $i < $data_length; $i++){
$a = ($a + 1) % 256;
$j = ($j + $box[$a]) % 256;
$tmp = $box[$a];
$box[$a] = $box[$j];
$box[$j] = $tmp;
$k = $box[(($box[$a] + $box[$j]) % 256)];
$cipher .= chr(ord($data[$i]) ^ $k);
}
return ($cipher);
}
function decrypt ($pwd, $data){
return RC4Crypt::encrypt($pwd, ($data));
}
}
来源：https://stackoverflow.com/questions/5348975/how-to-encode-and-decode-multidimensional-arrays-in-php