PHP4和PHP5性能大对比
PHP 4到今年年底PHP Group将不再对其进行支持了，所以为了让大家更有信心的转移到PHP 5平台上，我特别做了这个测试，看看我们PHP 4.x 是否真的性能比我们的PHP 5.x要好捏，测试结果很明显，那就是PHP 5.x 比php 4.x不论是面向对象还是面向过程，都要比PHP 4.x 要快，所以大家完全有必要转移到PHP 5.x 平台上，去体验PHP 5.x 平台的各种功能和性能。
因为PHP 5 包括新的对象模型，更多新特点，更快的处理速度，特别是处理面向对象代码的速度，虽然在php 4中面向对象代码的速度比较一般，但是在PHP5.x中面向对象代码的速度都超过了面向过程的速度，所以不要对面向对象的性能持有怀疑，下面的测试结果将说明这一切。
【测试环境】
* CPU: Intel Pentium4 2.66GHz
* Memory: 1GB
* Disk: 73GB/SCSI
* OS: FreeBSD 4.11
* Web: Apache 1.3.37
测试工具：ab （也可以选用http_load）
名词RPS: Requests per second (每秒的请求数量)
【PHP 4.4.2 测试结果】
[ 函数 Function ]
测试结果：ab -n 10000 -c 50 的结果是1047.23/rps
[ 类 Class ]
不实例化类
测试结果：ab -n 10000 -c 50 的结果是 1034.98/rps
实例化类
测试结果：ab -n 10000 -c 50 的结果是 1006.14/rps
类的继承
测试结果：ab -n 10000 -c 50 的结果是 992.95/rps
【PHP 5.2.1测试结果】
[ 函数 Function ]
测试结果：ab -n 10000 -c 50 的结果是 1176.06/rps
[ 类 Class ]
不实例化类
测试结果：ab -n 10000 -c 50 的结果是 1197.17/rps
实例化类
测试结果：ab -n 10000 -c 50 的结果是 1187.93/rps
类的继承和抽象
测试结果：ab -n 10000 -c 50 的结果是 1128.54/rps
【测试结果和分析】
[ 测试结果数据 ]
版本 函数测试 不实例化类 实例化类 类的继ā承
PHP 4.4.2 1047.23/rps 1034.98/rps 1006.14/rps 992.95/rps
PHP 5.2.1 1176.06/rps 1197.17/rps 1187.93/rps 1128.54/rps
[ 结果分析 ]
1. 总体来说，可以明显刚看到PHP5.2 的性能要比 PHP4.4略高一点，所以不要怀疑PHP5.2的性能会差，明显比 PHP4要快
2. PHP4.4中的类的解析性能明显要比函数的要慢，特别是当使用了继承以后，更是下降的厉害，所以在PHP4.4中更适宜使用面向过程和没有继承的类操作
3. PHP5.2中结果是类的执行速度比函数还要快，可以看出PHP5.2的引擎对面向对象处理花费了很大的功夫，同时他们不论是函数还是类，性能都不错
4. 通过这个测试，我们完全有理由在代码变更不大的情况下，把PHP4升级到PHP5，而且PHP5基本向下兼容PHP4的代码，除了一些特殊的代码。另外上面提到今年年底之后PHP Group将不再继续对PHP4进行维护了，所以早升级，早安心。
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
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian
Dec 24, 2024 pm 04:42 PM
PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati
7 PHP Functions I Regret I Didn't Know Before
Nov 13, 2024 am 09:42 AM
If you are an experienced PHP developer, you might have the feeling that you’ve been there and done that already.You have developed a significant number of applications, debugged millions of lines of code, and tweaked a bunch of scripts to achieve op
How To Set Up Visual Studio Code (VS Code) for PHP Development
Dec 20, 2024 am 11:31 AM
Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c
Explain JSON Web Tokens (JWT) and their use case in PHP APIs.
Apr 05, 2025 am 12:04 AM
JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,
PHP Program to Count Vowels in a String
Feb 07, 2025 pm 12:12 PM
A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total
How do you parse and process HTML/XML in PHP?
Feb 07, 2025 am 11:57 AM
This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an
Explain late static binding in PHP (static::).
Apr 03, 2025 am 12:04 AM
Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.
What are PHP magic methods (__construct, __destruct, __call, __get, __set, etc.) and provide use cases?
Apr 03, 2025 am 12:03 AM
What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.
