News Feed
Sections




News Archive
Looking for more information on how to do PHP the right way? Check out PHP: The Right Way

Anthony Ferrara's Blog:
PHP's Source Code For PHP Developers - Part 3 - Variables
March 22, 2012 @ 08:30:45

The third part of the "PHP source for developers" series has been posted over on Anthony Ferrara's blog today looking at the variables PHP's internals use.

In this third post of the PHP's Source Code for PHP Developers series, we're going to expand on the prior posts to help understand how PHP works internally. In the first post of the series, we looked at how to view PHP's source code, how it's structured as well as some basic C pointers for PHP developers. The second post introduced functions into the mix. This time around, we're going to dive into one of the most useful structures in PHP: variables.

He starts with one of the most important variable types used in PHP's source - the ZVAL. This is one of the keys to PHP's loose typing and can be thought of as "a class with only public properties". He gets into more detail with the properties of this "class" (value, refcount__gc, type and is_ref__gc). Also included is a look at how it's actually used - creating new ones, getting the value of them, converting their types and how the internal PHP functions parse their variables.

There's a lot more covered about variables in the post so if this is interesting stuff to you, be sure to read it all. They've done a great job of explaining one of the more complicated parts of the internals that power PHP.

0 comments voice your opinion now!
source code internals language variables parse type zval


blog comments powered by Disqus

Similar Posts

SitePoint PHP Blog: Why Choose PHP Over Alternatives?

Hannes Magnusson's Blog: Most PHP releases in August!

IBuildings Blog: PHP enters top 3 of most popular programming languages

Michael Nitschinger's Blog: Writing a simple lexer in PHP

Community News: IPC10 PHP: Yesterdays Scala and the Cobol of tomorrow? (video)


Community Events





Don't see your event here?
Let us know!


framework release library introduction opinion bugfix podcast tips symfony series language package api voicesoftheelephpant laravel install deployment interview list community

All content copyright, 2014 PHPDeveloper.org :: info@phpdeveloper.org - Powered by the Solar PHP Framework