[极客大挑战 2020]Roamphp1-Welcome

源码

 <?php
error_reporting(0);
if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
header("HTTP/1.1 405 Method Not Allowed");
exit();
} else {

    if (!isset($_POST['roam1']) || !isset($_POST['roam2'])){
        show_source(__FILE__);
    }
    else if ($_POST['roam1'] !== $_POST['roam2'] && sha1($_POST['roam1']) === sha1($_POST['roam2'])){
        phpinfo();  // collect information from phpinfo!
    }
} 

解题步骤

由于sha1和md5一样，不能加密数组，所以直接传数组就行
然后phpinfo里面有flag