一 代码
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>计算页面的运行时间</title>
<style type="text/css">
<!--
body,td,th {
font-size: 13px;
}
body {
margin-left: 10px;
margin-top: 10px;
margin-right: 10px;
margin-bottom: 10px;
}
-->
</style></head>
<body>
<div align="center">
<?php
function run_time()
{
list($msec, $sec) = explode(" ", microtime());
return ((float)$msec + (float)$sec);
}
$start_time = run_time();
$time1 = strtotime(date( "Y-m-d H:i:s"));
$time2 = strtotime("2017-10-01 00:00:00"); //2009年国庆节
$time3 = strtotime("2017-01-01 "); //2009年元旦
$sub1 = ceil(($time2 - $time1) / 3600); //60 * 60
$sub2 = ceil(($time3 - $time1) / 86400); //60 * 60 * 24
$end_time = run_time();
?>
<p>
</div>
<table width="500" height="502" border="0" cellpadding="0" cellspacing="0" background="images/bg.jpg">
<tr>
<td width="92" height="140"> </td>
<td width="287"> </td>
<td width="99"> </td>
</tr>
<tr>
<td height="95"> </td>
<td align="left" valign="top"><?php echo "距离2009年国庆节还有<font color=red> $sub1 </font>小时!!!" ; ?></td>
<td> </td>
</tr>
<tr>
<td height="50"> </td>
<td align="left" valign="top"><?php echo "距离2009年元旦还有<font color=red>$sub2 </font>天!!!"; ?></td>
<td> </td>
</tr>
<tr>
<td height="215"> </td>
<td align="left" valign="top">本示例的运行时间为<font color=blue> <?php echo ($end_time - $start_time); ?> </font>秒</td>
<td> </td>
</tr>
</table>
</body>
</html>
二 运行结果
