To find out what this code is encrypted with.

Ask what the following code is encrypted by
7hz6jhstbiqwasaxs2j66lxoh95gdscbwafonbwskfbpgq%3d%3d

How to encrypt or decrypt with PHP

Trouble who knows the big brother directly to PHP complete code, thank you

------Solution--------------------
There are many kinds of encryption, the most common is MD5 and SHA1 coding, but you this string of code performance is not correct, whether it is MD5 or SHA1 out the results are basically lowercase, I think there is no good man idle to the code of the randomness of the transfer into uppercase bar. followed by the length is not right, Unless it is encrypted and then cut. So basically you can rule out both of these conditions.
I think the biggest possibility is to write the encryption function after the result of encryption. And I guess this string is probably back in reverse.
Remember Discuz there is such a function, posted out for you to refer to. But it is difficult to know what technique he uses to encrypt a string of encrypted strings.

PHP code

//encryption/decryption function (to know decryption key to decrypt) function Passport_encrypt (    $txt, $key) {srand (double) microtime () * 1000000);    $encrypt _key = MD5 (rand (0, 32000));    $ctr = 0;    $tmp = ";    for ($i = 0; $i < strlen ($txt); $i + +) {$ctr = $ctr = = strlen ($encrypt _key)? 0: $ctr; $tmp. = $encrypt _key[$ctr].    ($txt [$i] ^ $encrypt _key[$ctr + +]); } return Base64_encode (Passport_key ($tmp, $key));}    function Passport_decrypt ($txt, $key) {$txt = Passport_key (Base64_decode ($txt), $key);    $tmp = ";    for ($i = 0; $i < strlen ($txt); $i + +) {$MD 5 = $txt [$i];    $tmp. = $txt [+ + $i] ^ $MD 5; } return $tmp;} 
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