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<?php
highlight_file('index.php');
include("flag.php");
$id=$_POST['id'];//通过POST给id传参
$json=json_decode($_GET['json'],true);//通过GET给json传参并把json格式解析成PHP数组格式，赋值给$json
if ($id=="wllmNB"&&$json['x']=="wllm")//id为"wllmNB"且json['x']为"wllm"
{echo $flag;}
?>