PHP基于文件存储实现缓存的方法,
本文实例讲述了PHP基于文件存储实现缓存的方法。分享给大家供大家参考。具体如下:
在一些数据库数据记录较大,但是服务器有限的时候,可能一条MySQL查询就会好几百毫秒,一个简单的页面一般也有十几条查询,这个时候也个页面加载下来基本要好几秒了,如果并发量高的话服务器基本就瘫痪了,造成一个页面很久也加载不下来,这个时候我们可以使用文件缓存来缓解下MySQL的压力,下面给个使用例子。
<?php //页面业务逻辑处理,获得结果 $objPage = new Page_IndexModel($arrParams); //一系列的业务逻辑放在了objPage中,调用process方法获得结果集 $arrResult = $objPage->process(); //获得结果后smarty赋值 $smarty->assign($arrResult); //输出模板 $smarty->display(); ?>
现在我们用文件缓存来略过Page业务处理这一步
<?php $cachFile = './index.php'; //缓存文件存在且时间不超过一小时,则直接使用缓存的结果集,不在进行任何的MySQL查询了 if(file_exists($cacheFile) && time()-filemtime($cachFile) < 3600) { //使用缓存中的结果 $arrResult = include($cachFile); } else { $objPage = new Page_IndexModel($arrParams); $arrResult = $objPage->process(); $strContent = "<?php \n return ".var_export($arrResult, true)."\n;"; //将结果集缓存 file_put_contents($cachFile, $strContent); } //获得结果后smarty赋值 $smarty->assign($arrResult); //输出模板 $smarty->display();
希望本文所述对大家的php程序设计有所帮助。
Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article
Assassin's Creed Shadows: Seashell Riddle Solution
1 months agoByDDD
What's New in Windows 11 KB5054979 & How to Fix Update Issues
3 weeks agoByDDD
Where to find the Crane Control Keycard in Atomfall
1 months agoByDDD
How to fix KB5055523 fails to install in Windows 11?
2 weeks agoByDDD
InZoi: How To Apply To School And University
3 weeks agoByDDD

Hot Tools

Atom editor mac version download
The most popular open source editor

Dreamweaver CS6
Visual web development tools

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function

Dreamweaver Mac version
Visual web development tools

SublimeText3 English version
Recommended: Win version, supports code prompts!
