php 4 和 php 5 的区别?-php问题

Difference between php 4 and php 5?(php 4 和 php 5 的区别?)

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问题描述

我正在寻找虚拟主机空间，得知 PHP 版本是 4.3 和 MySQL 版本 4.1

I'm in search of the web hosting space, and got to know the PHP version is 4.3 and MySQL Version 4.1

但我在 MySQL 5.x 版和 PHP 5.x 版中开发了我的应用程序

But i developed my application in MySQL version 5.x and PHP version 5.x

谁能告诉我版本的区别?

Can anyone give me the differences in versions ?

我现在无法访问什么?

谢谢...

推荐答案

PHP 版本 5 我认为 PHP 何时成为一种真正的语言，原因有很多，但最重要的是因为可以编写受人尊敬的面向对象代码.

PHP version 5 I look at as when PHP became a real language, for a whole bunch of reasons, but most importantly because it became possible to write respectable Object Oriented code.

但不要轻描淡写 MySQL 4 和 5 之间的区别——我认为它更深更重要.MySQl 5 是 MySQL 成为真正的关系数据库平台的时候，原因有很多，但最重要的是因为它可以编写完全表达性的 SQL 语句(从完全子查询支持开始).

But don't deemphasize the difference between MySQL 4 and 5 - I think it's even deeper and more significant. MySQl 5 was when MySQL became a real relational database platform, for a whole bunch of reasons, but most importantly because it became possible to write fully expressive SQL statements (starting with full subquery support).

我希望，早期版本中的这两个限制对您来说是最重要的.接受低于版本 5 的任何一个都没有合理的理由.

Just those two limitations on the earlier versions are, I hope, showstoppers for you. There's no reasonable excuse for accepting less than version 5 of either.

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