warning

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<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8"> 
	<title>php中文網(wǎng)(php.cn)</title> 
	<link rel="stylesheet" href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css">  
	<script src="https://cdn.bootcss.com/jquery/2.1.1/jquery.min.js"></script>
	<script src="https://cdn.bootcss.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
    
<div class="container">
	<h2>背景</h2>
	<p class="bg-warning">該段落使用了類 "bg-warning"。</p>
	<a class="bg-warning" href="/index.php">該鏈接使用了類 "bg-warning"。</a>
</div>
</body>
</html>
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