1 <?php

     2 function convert($str,$ky=''){

     3 if($ky=='')return $str;

     4 $ky=str_replace(chr(32),'',$ky);

     5 if(strlen($ky)<8)exit('key error');

     6 $kl=strlen($ky)<32?strlen($ky):32;

     7 $k=array();for($i=0;$i<$kl;$i++){

     8 $k[$i]=ord($ky{$i})&0x1F;}

     9 $j=0;for($i=0;$i<strlen($str);$i++){

    10 $e=ord($str{$i});

    11 $str{$i}=$e&0xE0?chr($e^$k[$j]):chr($e);

    12 $j++;$j=$j==$kl?0:$j;}

    13 return $str;

    14 }

    15 ///////////////////////////////////

    16 $key='contactsecurewebdev';

    17 

    18 $string1= base64_decode("CTxkaXYgaWQ9ImZvb3RlcnRvcCI+DQoJCSZjb3B5OyAyMDA5IDxhIGhyZWY9Ijw/cGhwIGJsb2dp

    19 bmZvKCd1cmwnKTsgPz4iPjw/cGhwIGJsb2dpbmZvKCduYW1lJyk7ID8+PC9hPiBBbGwgUmlnaHRz

    20 IFJlc2VydmVkLiBQcm91ZGx5IHJ1bm5pbmcgb24gPGEgaHJlZj0iaHR0cDovL3d3dy53b3JkcHJl

    21 c3Mub3JnIiB0YXJnZXQ9Il9ibGFuayI+V29yZHByZXNzPC9hPi4NCgkJPGJyIC8+DQoJCURlc2ln

    22 bmVkIEJ5OiA8YSBocmVmPSJodHRwOi8vd3d3LmdldHBva2VybmV3cy5jb20iPlBva2VyIE5ld3M8

    23 L2E+DQoJCTxiciAvPg0KCQlTcG9uc29yZWQgQnk6IDxhIGhyZWY9Imh0dHA6Ly93d3cucHJlbWl1

    24 bXdvcmRwcmVzc3RoZW1lcy5jby51ay8iPlByZW1pdW0gV29yZHByZXNzIFRoZW1lczwvYT4gfCA8

    25 YSBocmVmPSJodHRwOi8vd3d3LmZyZWUtZ2FtZXMtY29uc29sZS5jby51ayI+UHMzPC9hPiB8IDxh

    26 IGhyZWY9Imh0dHA6Ly93d3cuZ2xvYmFsY3Jpc2lzbmV3cy5jb20iPkdsb2JhbCBDcmlzaXMgTmV3

    27 czwvYT4gfCA8YSBocmVmPSJodHRwOi8vd3d3LmJlc3RyYXRlc291cmNlLmNvbS9sb2FucyI+TG9h

    28 bnM8L2E+DQoJPC9kaXY+");

    29 

    30 $string2=convert($string1,$key);

    31 

    32 $string3=convert($string2,$key);

    33 

    34 ?>