encryption - What does this PHP do? Is it an encoder/decoder? -

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i don't know php @ all; more of question of curiosity.

following php function below in text file few thousand characters of text, such as:

xnefstuhsnwgsx5ztq4x/auw/rtism+klrbetwg0xe1uwb49rnrxrgrgy5eep3y0uvtcvlqhufop 4n7ldlqpq9uactyuujgbkmuscqcylcp08u06t0k3nwtnim7q6bqmk/izbe+uk1ywbvc1lzr9ooek

does php function encode random-looking text php? can encryption scheme figured out this?

edit: client says has full ownership , rights code, developed else. how decoded? require password?

<?php //003ac if (!extension_loaded('ioncube loader')) {     $__oc = strtolower(substr(php_uname(), 0, 3));     $__ln = 'ioncube_loader_' . $__oc . '_' . substr(phpversion(), 0, 3) . (($__oc == 'win') ? '.dll' : '.so');     @dl($__ln);     if (function_exists('_il_exec')) {         return _il_exec();     }     $__ln   = '/ioncube/' . $__ln;     $__oid  = $__id = realpath(ini_get('extension_dir'));     $__here = dirname(__file__);     if (strlen($__id) > 1 && $__id[1] == ':') {         $__id   = str_replace('\\', '/', substr($__id, 2));         $__here = str_replace('\\', '/', substr($__here, 2));     }     $__rd = str_repeat('/..', substr_count($__id, '/')) . $__here . '/';     $__i  = strlen($__rd);     while ($__i--) {         if ($__rd[$__i] == '/') {             $__lp = substr($__rd, 0, $__i) . $__ln;             if (file_exists($__oid . $__lp)) {                 $__ln = $__lp;                 break;             }         }     }     @dl($__ln); } else {     die('the file ' . __file__ . " corrupted.\n"); } if (function_exists('_il_exec')) {     return _il_exec(); } echo ('site error: file <b>' . __file__ . '</b> requires ioncube  php loader ' . basename($__ln) . '  installed site administrator.'); exit(199); ?>

it's practically ioncube-encoded php, or obfuscated if like. ioncube non-free obfuscated-bytecode execution engine , ioncube loader library handles obfuscated code.

worth mention 'deobfuscator' free library, , it's loaded in of php installations i've seen.


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