Online PHP editor | output for ivCe7

<?php define('__FLAG__','3xZG{dgznclXAwFVCUHPMWFViZBDSsltxKdrvFBVYHSr1}'); function stypr_crypt($_0){$_1 = $_2 = $_3 = array(); $_4 =array('?','(','@', ';', '$','#', ']', '&', '*'); $_4 = array_merge($_4,range('a','z'),range('A','Z'),range('0','9')); $_4 = array_merge($_4,array('!', ')', '_', '+', '|', '%', '/', '[', '.', ' ')); for($_5=9,$_6=0;$_6 < $_5;$_6++){ for($_7=0;$_7<$_5;$_7++){$_2[$_6][$_7] = $_4[$_6*$_5+$_7]; $_3[$_6][$_7] = str_rot13($_4[($_5*$_5-1)-($_6*$_5+$_7)]);} } unset($_4); $_8 = floor(strlen($_0)/2)*2; $_9 = ($_8 == strlen($_0))?'':$_0[strlen($_0)-1]; $_10 =array(); for($_11 = 0;$_11 < $_8;$_11+=2){$_12 = $_13 = strval($_0[$_11]); $_14 = $_15 = strval($_0[$_11+1]); $_16 = $_17 = array(); for($_6=0;$_6 < $_5;$_6++){ for($_7=0;$_7<$_5;$_7++){ if($_12 === strval($_3[$_6][$_7])){ $_16 = array($_6, $_7);} if($_14 === strval($_2[$_6][$_7])){ $_17 = array($_6, $_7);} if(!isset($_9) && ($_9 === strval($_3[$_6][$_7]))){$_10 = array($_6, $_7);} } } if(sizeof($_16) && sizeof($_17)){$_13 = $_2[$_16[0]][$_17[1]]; $_15 = $_3[$_17[0]][$_16[1]];} $_1[] = $_13.$_15;} if(!isset($_9)&&sizeof($_10)){$_1[] = $_2[$_10[1]][$_10[0]];} return implode('',$_1); } $flag = 'flag{abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789}'; echo stypr_crypt(stypr_crypt(stypr_crypt($flag))); if(__FLAG__ === stypr_crypt(stypr_crypt(stypr_crypt($flag)))) echo 'Correct!'; else echo 'Incorrect..'; ?>