PHP计算页面执行时间
run_time.php Code:
<?php
class runtime
{
var $StartTime = 0;
var $StopTime = 0;
function get_microtime()
{
list($usec, $sec) = explode(' ', microtime());
return ((float)$usec + (float)$sec);
}
function start()
{
$this->StartTime = $this->get_microtime();
}
function stop()
{
$this->StopTime = $this->get_microtime();
}
function spent()
{
return round(($this->StopTime - $this->StartTime) * 1000, 1);
}
}
?>
return_time_test.php Code:
<?php
include ('run_time.php');
$runtime = new runtime;
$runtime->start();
$a = 0;
for ($i=0;$i<rim(1000000);$i++){
$a += $i;
}
$runtime->stop();
echo "页面执行时间：".$runtime->spent()."毫秒!";
?>
相关文档：
用Ajax实现Tab效果的
先创建
ajax.php，在其中输入如下代码：
<!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>
<title>Sample 2_1</title>
<me ......
1. $_GET
：
http://localhost/a.php?a=ok
<?
echo
$_GET['a']; //显示"ok"
?>
2. $_SERVER['QUERY_STRING']
http://localhost/a.php?a=1&b=2&c=3
......
本文来自国外的一个PHP技术人员网站，总结了国外的十个目前最流行的PHP
MVC框架。具体排名顺序未必准确，还有些知名框架，如Kohana等也没有提及。不过仍可以做为一篇不错的参考。
以下为十个目前最流行的基于MVC设计模式的PHP框架。
1. Yii
Yii是一个基于组件的高性能的PHP的框架，用于开发大规模Web应用。Yii采用� ......
Code:
<?php
function genRandomString($len)
{
$chars = array(
"a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k",
"l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v",
"w", "x", "y", "z", "A", "B", "C", "D", "E", "F", "G",
"H", "I", "J", "K", "L", "M", "N", "O", ......
