PHP 4和PHP 5之间的区别? [英] Difference between php 4 and php 5?

问题描述

我正在寻找虚拟主机空间，并且知道PHP版本为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

但是我在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

谁能给我版本的差异?

我现在无法访问什么?

谢谢...

推荐答案

PHP版本5我认为PHP成为一种真正的语言是出于多种原因，但最重要的是因为有可能编写出受人尊敬的面向对象对象代码.

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.

但是不要过分强调MySQL 4和5之间的区别-我认为它甚至更深，更重要.出于多种原因，MySQl 5是MySQL成为真正的关系数据库平台的时候，但最重要的是，因为有可能编写完全表达性的SQL语句(从完全的子查询支持开始).

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).

我希望早期版本的这两个限制对您有帮助.没有合理的借口接受任何一个版本低于5.

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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