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

Leonid Mamchenkov:
Dependency resolution with graphs in PHP
Nov 22, 2016 @ 10:52:23

Leonid Mamchenkov has a post to his site showing how he solved an interesting problem in one of his recent projects: determining the order to use items based on their dependencies.

One of the projects I am working on at work presented an interesting problem. I had a list of items with dependencies on one another and I needed to figure out the order in which to use those items, based on their dependencies.

He gives the example of database tables where it would be required to export the tables so that the relations between them are maintained when imported back in. He gives some example data, a basic nested PHP array, and defines the relationships between them (just strings in this case). While he did solve the problem, he wasn't happy with the solution. Instead he went looking for other options and found graph theory to be a good match. He briefly cover what the theory involves and links to an example that basically does what he needs...but is written in Python. He finishes off the post sharing his refactoring of this logic into PHP including a recursive "dependency resolver" and the output showing the correct ordering for loading objects based on their dependencies.

tagged: resolve dependency graph theory example tutorial load order

Link: http://mamchenkov.net/wordpress/2016/11/22/dependency-resolution-with-graphs-in-php/

Carlos Buenosvinos:
First tests with #PHP7 in production at @AtrapaloEng
Mar 18, 2016 @ 11:15:45

On his site Carlos Buenosvinos has a new post talking about the experience they had at @AtrapaloEng with PHP 7 and shares some of the improvements they've already seen so far.

On Monday, Badoo blogged about its migration to PHP7 (https://techblog.badoo.com/blog/2016/03/14/how-badoo-saved-one-million-dollars-switching-to-php7/). Those are great results! At @AtrapaloEng, we’re running already tests in production to perform the same step. We could have started some months before, but we’ve been struggling with the php-msgpack extension and its (un)support for PHP7. We hope to deploy PHP7 in all our server during this week but we would like to share with you what we have seen so far.

They share some graphs showing the changes when PHP 7 was deployed on their systems for both memory consumption and overall load average. They also talk about the boost in performance as far as response times and, an often not reported statistic, how it sped up their unit test runs too.

tagged: test php7 atrapaloeng performance results graph unittest

Link: https://carlosbuenosvinos.com/first-tests-with-php7-in-production-at-atrapaloeng/

Symfony Finland:
Symfony Benchmarks: PHP 5.6, HHVM 3.11 and PHP 7.0.1
Dec 29, 2015 @ 10:53:46

The Symfony Finland has shared some benchmarks of the latest versions of the Symfony framework (simple applications) on three current environments to see the differences: PHP 5.6, HHVM 3.11 and PHP 7.0.1.

Since the first functional versions of PHP 7.0.0 were made available, there have been a number of benchmarks comparing PHP 5.6, HHVM and PHP 7. [...] The recently released eZ Platform is a CMS built on the Symfony framework. It's a good representation of a modern PHP application with complex functionalities and no legacy code from the 2000's. Thus making a good candidate benchmarks for testing an application built with the Symfony Framework (version 2.7.8).

So let's see how an application built with the Symfony2 framework fares on PHP 5.6, HHVM 3.11 and PHP 7.0.1.

He starts by describing the test setup including the default installation of the eZ platform and how it was configured/set up. He then shares the results, showing memory usage and response times for each of the three different platforms. There's even results from different parts of the application: the front page and the "Top Stories" and "Projects" pages. The results also include the findings for the number of requests per second both with and without the Symfony Proxy included in the platform.

tagged: symfony benchmarks php56 hhvm php7 requestspersecond memory consumption graph

Link: https://www.symfony.fi/entry/symfony-benchmarks-php-56-hhvm-and-php-7

Joshua Thjissen:
Benford’s law in frameworks
Dec 10, 2015 @ 11:10:50

Joshua Thijssen has an interesting post to his site talking about Benford's Law, related to digits and how frequently they would appear in results based on significance.

In a new talk I’m currently presenting at conferences and meetups, I talk – amongst other things – about Benford’s law. This law states that in natural occurring numbers, the first digit of those numbers will most often start with a 1 (around 30% of the time), and logarithmically drops down to the number 9, which occurs only 5% of the time.

[...] Even though there is no guarantee that something will actually follow Benford’s law, a lot of things do, and in fact, it can be used for things like fraud detection: in your taxes, in elections, but basically anything concerning numbers. [...] But anyway, I wanted to see Benford’s law in action for myself, so I’ve come up with a simple test: Take a (PHP) framework, and count the line-numbers for each PHP file in the framework.

He shares the script (well, command) he uses to get these counts and how he did the sorting to help make some sense out of the results. He includes some of the results and graphs showing them to help visualize the Benford’s "curve" the results take. Interestingly enough, most of them follow the trend very closely with only slight variances for Zend Framework v2 and only them because it fluctuates more, nothing to do with the quality of the framework.

tagged: benfordslaw trend line count framework graph results

Link: https://www.adayinthelifeof.nl/2015/12/09/benfords-law-in-frameworks/

Platform.sh:
Creating flamegraphs with XHProf
Jul 30, 2015 @ 10:08:27

The Platform.sh blog has a post showing you how to create flamegraphs with XHProf for your application's execution and overall performance. A "flamegraph" is just a different sort of graph stacking up the execution times for the methods and functions in your application so they look more like a "flame" than just numbers.

One of the most frequent needs a web application has is a way to diagnose and evaluate performance problems. Because Platform.sh already generates a matching new environment for each Git branch, diagnosing performance problems for new and existing code has become easier than ever to do without impacting the behavior of a production site. This post will demonstrate how to use a Platform.sh environment along with the XHProf PHP extension to do performance profiling of a Drupal application and create flamegraph images that allow for easy evaluation of performance hotspots.

While they show it at work on a Platform.sh instance, the method can be altered slightly to work with your own application with the right software installed. Their example uses the brendangregg/FlameGraph library to do the majority of the graphing work. He shows how to have the code switch on XHProf during the execution and where to put the file for later evaluation. They include the resulting directories and files created from the execution and how to view the resulting (SVG-based) graphs directly in a browser.

tagged: xhprof flameframe execution performance graph tutorial platformsh

Link: https://platform.sh/2015/07/29/flamegraphs/

Luciano Mammino:
Symfony security: authentication made simple (well, maybe!)
Jun 04, 2015 @ 10:36:41

Luciano Mammino has a quick post to his site with information that tries to help make Symfony authentication simple (well, maybe).

The Symfony2 security component has the fame of being one of the most complex in the framework. I tend to believe that's partially true, not because the component is really that complex, but because there are (really) a lot of concepts involved and it may be difficult to understand them all at once and have a clear vision as a whole.

[...] Going back to the Symfony2 security component, the point is that I found out difficult at first glance to get a clear idea of what is going on behind the scenes and what I need to write to create a custom authentication mechanism. So in this post I will try to collect few interesting resources that helped me understanding it better and a graph I drawn to resume what I learned.

He provides a good list to some of the other resources that helped him along the way including several blog posts and links to the Symfony "cookbooks" about creating custom providers. He also shares a graph showing the full flow of the Symfony authentication process including commentary about each step.

tagged: symfony authentication simple resources graph flow provider

Link: http://loige.co/symfony-security-authentication-made-simple/

SitePoint PHP Blog:
Efficient User Timelines in a PHP Application with Neo4j
Apr 15, 2015 @ 12:41:25

In the latest post to the SitePoint PHP blog Christophe Willensen shows you how to use PHP and the Neo4j graph database to make efficient user timelines in your application. In this case, "timeline" should be thought of as something like a Twitter or Facebook status update feed.

Any social application you encounter nowadays features a timeline, showing statuses of your friends or followers generally in a descending order of time. Implementing such a feature has never been easy with common SQL or NoSQL databases. Complexity of queries, performance impacts increasing with the number of friends/followers and difficulties to evolve your social model are points that graph databases are eliminating. In this tutorial, we’re going to extend the demo application used by the two introduction articles about Neo4j and PHP.

He starts off with a look at how to model the timeline in the graph database, showing different methods to create the relationships: one a direct user-to-post and the other via a linked list. He goes through the initial setup of the codebase and the sample dataset to populate the Neo4j database. He then includes code samples showing how to get the latest feed items for a user and displaying the results in a simple template (Twig-based). He also shows how to get the latest posts for the timeline and how to add a new post.

tagged: tutorial neo4j database graph user timeline socialmedia

Link: http://www.sitepoint.com/efficient-user-timelines-php-application-neo4j/

SitePoint PHP Blog:
Discover Graph Databases with Neo4j and PHP
Feb 16, 2015 @ 11:49:51

The SitePoint PHP blog has a post today about combining PHP and Neo4j, a popular graph database, and create a simple application.

In this post, we’ll be learning about Neo4j, the leading graph database, and ways to use it with PHP. In a followup post, we’ll be building a proper graph application powered by Silex. [...] For the newcomers, here is a short introduction to graph databases and Neo4j, apart from the theoretical glance we threw at it last year.

For those not familiar with some of the concepts behind graph databases, they start with a quick introduction. They illustrate the concept of relationships with a few helpful images. They also cover the basics of Cypher, the language used in Neo4j database queries. They then show how to get the Neoxygen components installed to talk with the Neo4j database (via an HTTP API) and configuring a basic connection. The remainder of the post shows how to insert data into the database, including relationships, and pulling that information back out via PHP.

tagged: graph database neo4j tutorial introduction neoxygen series part1

Link: http://www.sitepoint.com/discover-graph-databases-neo4j-php/

SitePoint PHP Blog:
PHP and Neo4j: Introduction to Graph Databases
Jan 13, 2014 @ 12:18:52

On the SitePoint PHP blog today they've posted a new tutorial by Mehul Jain about combining PHP and Neo4J, a popular graph database tool as an alternative to the typical table-driven database structure. This is the first part of a series and only explains some of the basics behind the technology. The actual PHP implementation comes next.

For a long time, data has been typically stored in tabular form so as to increase the indexing and readability. Nowadays, the trends are changing as Graph databases are quickly gaining popularity. In fact, it would not be wrong to call them "the future of DBMS". New to the world of graphs and databases? Don't worry, by the end of this introductory article you will have sound theoretical knowledge about the topic – just enough to easily glide through the rest of the series – actual implementation.

He starts with the basics - introducing the ideas behind graph databases and some of the most basic concepts behind them. He continues, looking at common uses for them including dealing with connected data and how it lets you "move through" the data rather than jumping from record to record. He includes some real world examples if this kind of data ranging from social networks to network management.

tagged: graph databases introduction neo4j tutorial

Link: http://www.sitepoint.com/php-neo4j-introduction-graph-databases/

Kevin Schroeder:
How much memory does Magento use?
Dec 10, 2013 @ 10:42:23

Kevin Schroeder was asked recently (as a part of a training class) about the amount of memory Magento actually uses during its execution. Magento is a widely-used e-commerce platform built in PHP.

Now, I know what you’re supposed to set it at, but I’ve never measured actual usage. So I gave some bullcrap answer about how it really depends on a bunch of things and that I really shouldn’t give a precise answer. But the individual persisted and I was forced to put my tail between my legs and admit that I didn’t know. So I promised that I would take a look and here are my results.

He briefly mentions how he tested the memory usage of the code overall by adding an event to several spots in the application and using memory_get_usage. Using the sample Magento data he worked his way through the site and tracked the events/memory usage on the various page of the site including:

  • Main category page
  • Category page with images
  • Simple product page
  • Add to Cart

Each of these has a graph showing the memory usage at each stage. Additionally, he's graphed them all together to compare the overall memory consumption.He finishes off the post with a few summary items and conclusions from his results.

tagged: magento memory usage consumption graph

Link: http://www.eschrade.com/page/how-much-memory-does-magento-use/