<?php
//$first = "hello everybody!";
//echo $first;
$body=<<<start
<html>
<head>
<title>整站</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<style type="text/css">
*{
margin:0;
padding:0;
}
#land{
border:2px solid gray;
width:350px;
height:150px;
border-radius:8px;
/*margin:0 auto;*/
position:absolute;
left:50%;
top:50%;
margin:-75px 0 0 -175px;
}
</style>
<script type="text/javascript"></script>
</head>
<body style="background-color:#00CACA;">
<div id="land"></div>
</body>
</html>
start;
echo $body;
?>
使div相对于窗口绝对定位,一定要设置div的宽度和高度,进而左移div宽度的一半,上移div高度的一半。