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Analysis of PHP7
Apr 29, 2016 @ 12:15:56

On the Viva64.com site they've posted the results of their own evaluation of PHP 7 in terms of both the source of the language itself and the libraries it makes use of.

Sometimes checking a project one more time can be quite amusing. It helps to see which errors were fixed, and which ones got into the code since the time it was last checked. My colleague has already written an article about PHP analysis. As there was a new version released, I decided to check the source code of the interpreter once again, and I wasn't disappointed - the project had a lot of interesting fragments to look at.

They start with a brief look at PHP 7 including when it was released, some of the features/functionality included and the tool they used to do the analysis. They talk about some of the difficulties in the analysis process and how the widespread user of macros tripped it up a bit. They includes some code examples from PHP's source and the warnings that their PVS-Studio returned. The post ends with a brief look at the third-party libraries PHP uses and the responsibility the project takes in including them.

tagged: php7 analysis language source scanner pvsstudio results

Link: http://www.viva64.com/en/b/0392/#ID0EWECK

SitePoint PHP Blog:
Your First Drupal 8 Migration
Mar 10, 2016 @ 12:20:06

In this tutorial on SitePoint.com author Daniel Sipos introduces you to the concepts behind the Migrate module in Drupal 8 and how it can be used to move content over from other sources.

Migrate is one of the most established modules in the Drupal ecosystem. So much so that with Drupal 8, a decision has been made to get some of its functionality ported and added to Drupal core. An important reason was that the traditional upgrade between major releases was replaced with a migration of Drupal 6 or 7 content and configuration to Drupal 8.

[...] In this article we are going to look at how migration works in Drupal 8 by migrating some content into node entities. For simplicity, the data we play with resides in tables in the same database as our Drupal installation.

He starts but outlining the "migration theory" and parts of the process to get the data in to your Drupal 8 instance: the source, the process and the destination. He uses a movie content example to show the setup needed to create the tables and define the configuration for the relationship to genres. He then shows how to make the migration configuration, defining the three parts and how to define the related migration classes. He ends the post with the drush command to execute the migration, get the current migration status and roll them back if something unexpected happens.

tagged: drupal8 migration data import source process destination

Link: http://www.sitepoint.com/your-first-drupal-8-migration/

SitePoint PHP Blog:
Re-Implementing the Range Operator in PHP
Mar 09, 2016 @ 12:21:08

The SitePoint blog has a new post that revisits a previous tutorial about implementing a custom operator - the "range" operator - natively in PHP itself. In this new article (again, a repost from the article by Thomas Punt) he comes back and refines the implementation a bit to fix some of the issues with the previous version.

In the prequel to this article (hint: make sure you’ve read it first), I showed one way to implement a range operator in PHP. Initial implementations, however, are rarely the best, and so it is the intention of this article to look at how the previous implementation can be improved.

He starts by mentioning some of the drawbacks to the previous implementation, mostly that the computation of the value would only happen at runtime (slower) and not compile time. He then goes through the code from before and shares the updates to make that allow this compile-time option to work on the lexer, parser and adding in new code for the compilation stage. Finally he makes the updates the Zend VM to allow for these changes to take effect.

tagged: reimplement range operator tutorial source update

Link: http://www.sitepoint.com/re-implementing-the-range-operator-in-php/

Joshua Thjissen:
Incrementing values in PHP
Oct 13, 2015 @ 10:50:01

Joshua Thjissen has a post to his site looking at a relatively common operation in PHP code - incrementing values - but gets a lot more in-depth than just a simple overview.

Take a variable, increment it with 1. That sounds like a simple enough job right? Well.. from a PHP developer point of view that might seem the case, but is it really? There are bound to be some catches to it (otherwise we wouldn’t write a blogpost about it). So, there are a few different ways to increment a value, and they MIGHT seem similar, they work and behave differently under the hood of PHP, which can lead to – let’s say – interesting results.

He starts with the most basic situations, updating known integer values, but shows the curious things that can happen when the same operations are done on strings. He digs down into the bytecode that's generated from these bits of code, showing the order of operations when the code is actually executed. He then gets into more detail on each kind of operator, starting with the unary increment operator then moving on to the add assignment expression and add operator. For each he describes the behind the scenes bytcode actions happening and where in the PHP source code its being handled (and how).

tagged: increment value integer string bytecode indepth source

Link: https://www.adayinthelifeof.nl/2015/10/13/incrementing-values-in-php/

How to Create a PHP C Extension to Manipulate Arrays Part 1: Basic Array Class Exten
Aug 11, 2015 @ 10:27:24

Dmitry Mamontov has posted a the first part of a series looking at manipulating arrays in the PHP source and enhancing performance for certain handing as a PHP extension.

In PHP projects, arrays are used every where because they are useful and flexible to store all sorts of data structures. However, when you need to maximize the performance the manipulation of arrays for specific purposes, you can achieve great gains if you implement a PHP extension written in the C language. Read this tutorial to learn how to build your own basic array manipulation extension in C.

He covers all the steps you'll need to get start building the extension, introduces a few key concepts and starts on the code for the extension:

  • Building PHP from the Source
  • Building a PHP Extension (overview)
  • Brief Introduction to zval and Functions
  • Defining a Class in Our Extension
  • D for Dynamic (working with dynamic array values)

The C code needed is included through out the post. The next part in the series will build on this and show how to implement interfaces like ArrayAccess and Traversable.

tagged: extension array manipulate part1 series introduction source

Link: http://www.phpclasses.org/blog/post/304-How-to-Create-a-PHP-C-Extension-to-Manipulate-Arrays--Part-1-Basic-Array-Class-Extension.html

SitePoint PHP Blog:
How to Install PHP Extensions from Source
Jun 30, 2014 @ 11:50:22

PHP extensions (from PECL) can be very handy when you need them. Unfortunately, not all distributions come with packages that will install them for you...this is where compiling comes in. On the SitePoint PHP blog Bruno Skvorc has posted a guide to compiling extensions from source to help you get started.

Sometimes it’s hard to know which PHP extensions you’ll need before you install PHP. In cases where you need to add extensions later on, you might get lucky and the extension could be in the repository of the OS you’re using. [...] What if there’s no such thing for other extensions, though? In this tutorial, we’ll go through installing some custom extensions on Linux systems (and OS X – the process is nearly identical).

He uses a Laravel Homestead instance as a platform for his example and shows the compilation of the MongoDB for PHP driver. He walks you through the process of booting up the VM and getting the environment/required packages installed. He then shows the process for the installation of two different kinds of PHP extensions: internal and third-party. Finally he shows you how to update your configuration, load in the compiled extension and test it (in this case looking at the phpinfo() to ensure it's loaded).

tagged: install extension source compile tutorial introduction

Link: http://www.sitepoint.com/install-php-extensions-source/

New Relic Blog:
25 PHP Developers to Follow Online
May 14, 2014 @ 09:14:55

On the New Relic blog today there's a new list posted of the 25 PHP developers they suggest you follow, both on Twitter and via their code contributions.

Building PHP frameworks is hard, but following these PHP source and framework committers on Twitter is easy. You’ll learn lots of interesting bits about what’s happening in their respective communities, and if you want to see where the PHP and PHP framework communities are going next, just watch your feed for these folks.

Included in their list are PHP notables like:

Check out the full post for the rest of the list!

tagged: developers follow opinion twitter github source framework community

Link: http://blog.newrelic.com/2014/05/02/25-php-developers-follow-online/

Hasin Hayder:
Installing gearmand, libgearman & pecl gearman for php from source in Debian 6 & 7
Oct 31, 2013 @ 11:55:51

Hasin Hayder has posted a complete guide to getting Gearman and PHP playing nicely together. The guide gives you a step by step (and command by command) list to follow so you don't have the same pains he did trying to get it working.

I had a pretty rough evening today. No, not because the waiter forgot to add sugar in my tea, but because it was so boring to go through the trial and errors of installing gearman daemon and pecl gearman extension for php.

He walks though the whole process, starting with the failures, that he took getting it installed. Unfortunately it wasn't just as easy as installing a package and using PECL to drop in the extension. There was other software packages that needed to be installed as well and were a bit harder to figure out - libboost, gperf, libevent, uuid-dev and libcloog-ppl-dev. With these installed, the PECL install command was finally able to build and he got the shared module he needed.

tagged: install guide gearman gearmand pecl debian source extension

Link: http://hasin.me/2013/10/30/installing-gearmand-libgearman-and-pecl-gearman-from-source/

Zumba Engineering Blog:
Incorporating Mongounit into Multi-datasource Models with Traits
Oct 31, 2013 @ 10:42:27

On the Zubma Engineering blog today Chris Saylor has written up a tutorial showing how they used traits to use multiple data sources with Mongounit, working around the single source limitations it enforces.

A while back we open sourced Mongounit, a PHPUnit extension for testing models utilizing mongodb. One key issue that we’ve discovered as we incorporate MongoDB into more of our data models is that extending Mongounit’s TestCase class limits that unit test towards Mongo only as the datasource. Since only a portion of our data is in Mongo while the remaining is in MySQL, limiting a test case to work with one datasource or another is too limiting.

They tried two other solutions first, separating out the tests by data source and manually clear the Mongo data in the tests, but both ran into problems. Instead, they opted to use traits to provide drop-in Mongo testing support as needed. It provides a simple interface to set up and tear down the needed Mongo resources - an example of which is also provided in the post. The code for the trait can be found on Github.

tagged: trait mongounit unittest database multiple source model

Link: http://engineering.zumba.com/2013/10/30/multiple-data-sources-phpunit-testing/

SitePoint PHP Blog:
Responsive Images Using Picturefill and PHP
Oct 10, 2013 @ 10:08:11

On the SitePoint PHP blog there's a new post from Lukas White showing you how to use the Picturefill plugin (Javascript) along with PHP to make responsive images.

One of the key challenges with responsive web design, and a subject of much discussion in recent years, is how to deal with images. Setting a max-width on image elements enables designers to allow their size to adapt to the page dimensions, but in itself that approach can lead to far bigger images being downloaded than are required. [...] You can use a similar approach [to "source sets" of images] straight away and in a cross-browser compatible manner by using Javascript; one such method is the Picturefill plugin. In essence, Picturefill allows you to specify different src attributes for an image, each image file corresponding to a different media query. Thus

The tutorial helps you create an application, powered by the Slim framework and the ImageMagick extension, for the basic structure. He then grabs the Picturefill library and drops them into place. Some sample code is also included showing how to create the HTML structure for the images and the Javascript to handle the switching.

tagged: responsive image picturefill tutorial resolution source set

Link: http://www.sitepoint.com/responsive-images-using-picturefill-php/