public function __construct() { exec('cat ./json.data', $result); $this->content = count($result) > 0 ? $result[0] : "get data error"; } public function show() { echo $this->content; } } ?> <?php if ($_SERVER['REQUEST_METHOD'] == 'POST') { $pm = new pm(); $pm->show(); } else { ?> <html> <head> <script src="http://libs.baidu.com/jquery/1.9.0/jquery.js"></script> </head> <title>乐居气象监测站</title> <link rel="icon" href="favicon.ico"> <style> div {font-size:15px; line-height:20px;} #time {margin-top:20px;} </style> <body> <h3>室内:</h3> <div id="pm">Reading...</div>