<?php
if(isset($_GET["cl"])){
$color = $_GET["cl"];
echo $color;
echo "<style>body{background-color:$color}</style>";
}
?>
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="content-type" content="text/html" />
<meta name="author" content="blog.anchen8.net" />
<title>背景颜色变更</title>
</head>
<body>
<form action="styleChangs.php" method="get">
<select name="cl">
<option selected="true">Red</option>
<option>Blue</option>
<option>Pink</option>
<option>Black</option>
<option>Purple</option>
</select>
<input type="submit" value="chang"/>
</form>
</body>
</html>