<meta charset="UTF-8">
<?php
include './flag.php';
error_reporting(0);
$par1 = $_GET['par1'];
$par2 = $_GET['par2'];
$par3 = $_POST['par3'];
$par4 = $_POST['par4'];
if (isset($par1)&&isset($par2)&&isset($par3)&&isset($par4)) {
if ($par1 === $par2 && md5($par1) !== md5($par2)) {
die('还想读取flag？');
}
if (hash("md4", $par3) == hash("md4", $par4)) {
echo '给你flag！' . $flag;
}
}

这题有问题吧