@广外-枯燥的抽奖

<?php #这不是抽奖程序的源代码！不许看！ header("Content-Type: text/html;charset=utf-8"); session_start(); if(!isset($_SESSION[‘seed‘])){ $_SESSION[‘seed‘]=rand(0,999999999); } mt_srand($_SESSION[‘seed‘]); $str_long1 = "abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"; $str=‘‘; $len1=20; for ( $i = 0; $i < $len1; $i++ ){ $str.=substr($str_long1, mt_rand(0, strlen($str_long1) - 1), 1); } $str_show = substr($str, 0, 10); echo "<p id=‘p1‘>".$str_show."</p>"; if(isset($_POST[‘num‘])){ if($_POST[‘num‘]===$str){x echo "<p id=flag>抽奖，，就是那么枯燥且无味，给你flag{xxxxxxxxx}</p>"; } else{ echo "<p id=flag>没抽中哦，再试试吧</p>"; } } show_source("check.php");