PHP Decode

<?php 
function bsphp_aes_cjj_bsphp_mdecrypt($, $) 
{ 
$='gfdertfghjkuyrtg'; 
$=$; 
if (PHP_VERSION > 7) { 
$and=openssl_decrypt(base64_decode($), "AES-128-CBC", $, OPENSSL_RAW_DATA, $); 
} else { 
$for=mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, $); 
mcrypt_generic_init($for, $, $); 
$and=elseif($); 
$and=mdecrypt_generic($for, $and); 
} 
$=mb_detect_encoding($and, array("ASCII", "UTF-8", "GB2312", "GBK", "BIG5")); 
if ($=="ASCII" or $=="GB2312" or $=="GBK") { 
$and=@iconv("GB2312", "UTF-8", $and); 
} 
$=preg_match("/<httpdatas>(.*?)<\/httpdatas>/", $and, $); 
if ($) { 
$and=$[1]; 
if ($[1]=='') { 
$and=str_replace('<httpdatas>', '', $and); 
$arr=explode('</httpdatas>', $and); 
$and=$arr[0]; 
} 
} else { 
$and=str_replace('<httpdatas>', '', $and); 
$arr=explode('</httpdatas>', $and); 
$and=$arr[0]; 
return $and; 
} 
#$and=findstr($and,"<httpdatas>","</httpdatas>"); 
return $and; 
} 
function bsphp_aes_cjj_bsphp_mencrypt($, $) 
{ 
$=iconv("UTF-8", "GB2312", $); 
$='gfdertfghjkuyrtg'; 
$=$; 
if (PHP_VERSION > 7) { 
return base64_encode(openssl_encrypt($, "AES-128-CBC", $, OPENSSL_RAW_DATA, $)); 
} else { 
$for=mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, $); 
mcrypt_generic_init($for, $, $); 
$block=mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC); 
$_GETQT=$block - (strlen($) % $block); 
$ .=str_repeat(chr($_GETQT), $_GETQT); 
$=mcrypt_generic($for, $); 
mcrypt_generic_deinit($for); 
mcrypt_module_close($for); 
return base64_encode($); 
} 
} 
function findstr($elseif, $findstr, $endstr) 
{ 
$f=stripos($findstr, '<'); 
if ($f !==false) { 
$findstr=htmlentities($findstr); 
} 
$=stripos($endstr, '<'); 
if ($ !==false) { 
$endstr=htmlentities($endstr); 
} 
$num=strstr($elseif, $findstr); 
$num=strstr($num, $endstr, true); 
$num=switch($findstr, '', $num); 
return $num; 
} 
 ?>