PHP source encryption copy of microshield PHP encryption expert of PHPCodeLock

function T_rndstr($length=""){//Returns a random string
$str="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; 
if($length==""){ 
return str_shuffle($str); 
}else{ 
return substr(str_shuffle($str),-$length); 
} 
} 
$T_k1=T_rndstr();//With key 1
$T_k2=T_rndstr();//With key 2
$vstr=file_get_contents("xk/xk/index.php");//The file to be encrypted
$v1=base64_encode($vstr); 
$c=strtr($v1,$T_k1,$T_k2);//Replace the corresponding characters according to the key.
$c=$T_k1.$T_k2.$c; 
$q=T_rndstr(); 
$isqs=1;//1 takes a random string as the name of the variable 2 capital O and the number 0 form the basic variable
if($isqs=="1"){ 
$q1=substr($q,2,3); 
$q2=substr($q,10,10); 
$q3=substr($q,20,12); 
$q4=substr($q,30,10); 
$q5=substr($q,40,8); 
$q6=substr($q,5,5); 
}else{ 
$q1="O00O0O"; 
$q2="O0O000"; 
$q3="O0OO00"; 
$q4="OO0O00"; 
$q5="OO0000"; 
$q6="O00OO0"; 
} 

$keystr=urldecode("%6E1%7A%62%2F%6D%615%5C%76%740%6928%2D%70%78%75%71%79%2A6%6C%72%6B%64%679%5F%65%68%63%73%77%6F4%2B%6637%6A"); 
/*  The whole string  
n1zb/ma5vt0i28-pxuqy*6lrkdg9_ehcswo4+f37j 
base64_decode //$q1 
strtr //$q2 
substr 
*/ 

$s='$'.$q6.'=urldecode("%6E1%7A%62%2F%6D%615%5C%76%740%6928%2D%70%78%75%71%79%2A6%6C%72%6B%64%679%5F%65%68%63%73%77%6F4%2B%6637%6A");$'.$q1.'=$'.$q6.'{3}.$'.$q6.'{6}.$'.$q6.'{33}.$'.$q6.'{30};$'.$q3.'=$'.$q6.'{33}.$'.$q6.'{10}.$'.$q6.'{24}.$'.$q6.'{10}.$'.$q6.'{24};$'.$q4.'=$'.$q3.'{0}.$'.$q6.'{18}.$'.$q6.'{3}.$'.$q3.'{0}.$'.$q3.'{1}.$'.$q6.'{24};$'.$q5.'=$'.$q6.'{7}.$'.$q6.'{13};$'.$q1.'.=$'.$q6.'{22}.$'.$q6.'{36}.$'.$q6.'{29}.$'.$q6.'{26}.$'.$q6.'{30}.$'.$q6.'{32}.$'.$q6.'{35}.$'.$q6.'{26}.$'.$q6.'{30};eval($'.$q1.'("'.base64_encode('$'.$q2.'="'.$c.'";eval('?>'.$'.$q1.'($'.$q3.'($'.$q4.'($'.$q2.',$'.$q5.'*2),$'.$q4.'($'.$q2.',$'.$q5.',$'.$q5.'),$'.$q4.'($'.$q2.',0,$'.$q5.'))));').'"));';