What's the difference between PHP 5.3.x and PHP 5.2.x and which one should I use? [duplicate]

This question already has an answer here: 开发者_JAVA技巧 Closed 12 years ago.

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PHP 5.3 changelog?

I am new to PHP, and I am confused which PHP version I should use: 5.3.3 (latest in 5.3.x), or 5.2.14 (latest in 5.2.x). What's the difference between them?

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You can read about some of the PHP 5.3 features here:

http://php.net/releases/5_3_0.php

You might as well go with the latest release if you have a choice.

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You'll want to read the 5.3 Migration Guide, which outlines in detail the differences between 5.2 and 5.3.