Online PHP editor | output for IDAGT

@ 2017-07-08T15:45:08Z

<?php
    function decrypt($a)
    {
        $a1 = strtolower(strrev($a));
        $a2 = hexdec(substr($a1,0,4)) ^ hexdec('BFF') ^ hexdec('D77D');
        $a3 = substr($a1,4);
        $a5 = 0;
        
        for($a5=0;$a5<strlen($a3);$a5+=6){
         ++$a6;   
        
        $mul=$a6 * $a6;
        $a7=$mul ^ hexdec('6E');
        
        $ans =  chr(octdec(hexdec(substr($a3,$a5,6))) ^ hexdec('AFE43') ^ hexdec('399AA3') ^ $a7 ^ $a2);
        }
        return $ans;
        
    }
    
    echo decrypt('299BFD579BFD8B9BFDE9ABFD2EABFD84ABFD28ABFD07BBFDB9BBFDE1BBFD74BBFD97CBFDA4CBFD45CBFD36CBFDB0CBFD8EBBFD00CBFD0FBBFD41CBFDCFBBFDAFBBFD5DDD');
    
    define('__FLAG__', 'flag{hidden_flag}');
    if(decrypt("DEFBFD2EFBFDBCFBFD58FBFD56FBFD31FBFDDFEBFD3BEBFD48EBFD16EBFD83EBFD2DDBFDDFDBFDBCDBFDCBDBFD87DBFDB9DBFDB5DBFD76DBFDF6DBFDF5DBFDD5DBFD82ED") == 'pwning_the_phpreverse!')
    {
    	echo __FLAG__;
    }
?>

Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: Warning: Undefined variable $a6 in /in/IDAGT on line 10 ! Warning: Undefined variable $a6 in /in/IDAGT on line 10
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Warning: Undefined variable $a6 in /in/IDAGT on line 10 ! Warning: Undefined variable $a6 in /in/IDAGT on line 10
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33: Notice: Undefined variable: a6 in /in/IDAGT on line 10 ! Notice: Undefined variable: a6 in /in/IDAGT on line 10
Output for 7.3.32 - 7.3.33, 7.4.26: !

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