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Sameer Borate:
Calculating descriptive statistics in MySQL
April 08, 2014 @ 10:46:22

Sameer Borate has shared some examples of how to generate some meaningful statistics about the contents of your database in a new post to his site today.

Descriptive statistics can be quite useful for simple analysis of records in a database. For example, to calculate average numbers of sales or products for a particular duration, or the Variance of sales for a month etc. We can easily calculate standard descriptive statistic measures in MySQL such as MEAN, SUM, STANDARD DEVIATION, VARIANCE, MIN and MAX using built-in functions.

He includes both the SQL and a bit of PHP code showing how to get these statistics (based on a simple data set of student scores). The PHP is required to more correctly evaluate the median and mode values as it's easier to evaluate those in PHP.

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Link: http://www.codediesel.com/data/calculating-descriptive-statistics-in-mysql

Rob Allen:
Implementing a ZF2 development mode
January 02, 2014 @ 09:18:07

Rob Allen has shared a method he's found for implementing a Zend Framework v2 in development mode, more specifically for an Apigility installation.

One feature that piqued my interested in the Apigility skeleton application was development mode. [...] Behind the scenes, this [call to public/index.php] runs an action in DevelopmentModeController which copies config/development.config.php.dist to config/development.config.php. Then there is some code in public/index.php that ensures that this file is loaded.

You can then have a ModuleManager instance specifically for the development version and configuration. This allows for a greater amount of customization and removes some requirements you might have had in production. He's also created a module that handles some of this for you automatically you can drop into your installation.

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zendframework2 apigility development mode tutorial

Link: http://akrabat.com/computing/implementing-a-zf2-development-mode/

Johannes Schlüter's Blog:
Testing persistent connection and thread-safety features in PHP
March 22, 2012 @ 09:51:58

In this recent post to his blog Johannes Schlüter he talks about a way that he's come up with to test functionality that uses persistent connections (and an module he created to help).

In a few rare cases this is not what people like, for that PHP introduced "persistent connections" of different kinds. Testing those is a bit annoying as you have to configure a webserver and ensure to hit the same instance over the course of a test and then use a load generator, probably one which can detect a failure. Additionally by having a webserver in the game there is more code being executed, which might mean an additional source for trouble while debugging. An alternative might be using FastCGI, while that adds it's own issues for such a test. To solve this for myself I, some time ago, wrote a PHP SAPI module called pconn and pushed it to github.

The extension provides a way to emulate requests by executing a script multiple times automatically, making it easier to test things that require checking against multiple things simultaneously. While the built-in webserver (PHP 5.4) can be used to test some of these things too, Johannes' extension can also be compiled to help with testing of threading in applications as well.

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testing persistent threat safe extension sapi module webserver


DevShed:
Null and Empty Strings
December 03, 2008 @ 11:16:51

On DevShed today, there's a new tutorial posted looking at two things that can cause headaches for PHP developers (especially when evaluating and comparing values) - nulls and empty strings.

Anyone who has programmed for any length of time has encountered the concepts of null and empty strings. They are not the same, and confusing the two can cause some serious problems. This article deals with these concepts in the context of PHP and MySQL.

They start with a bit of a quiz before getting into how to handle them correctly - making null "safe" and working with it correctly in a MySQL context. SQL statements and table structures are included for their examples.

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null empty string tutorial mysql handle safe


Mike Lively's Blog:
Late Static Binding (LSB) forward_static_call()
April 09, 2008 @ 11:24:19

On his blog, Mike Lively has posted a look at some of the work he's been doing on patches for the late static binding functionality to be included in PHP, including an example of the updates in action.

This weekend I wrapped up a few small tests and sent the patch in and it was subsequently pushed to php 5.3 and php 6.0. Now, this is not at all the way I wanted things to work, in all honesty I think the patch is pretty hokey but unfortunately nobody really spoke up in support of the changes I wanted to make to parent:: in regards to LSB.

His example shows how to override a static method and push that new method's execution to the parent class (in two ways - safe using forward_static_call and the not so safe calling itself with a parent:: override).

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latestaticbinding php5 php6 patch safe unsafe parent forwardstaticcall


Job Posting:
MODE Visual Seeks PHP Developer (Charlotte, NC)
February 01, 2008 @ 13:31:38

Company MODE Visual
Location Charlotte, NC
Title Web Developer
Summary

We're looking for a full-time onsite Web Developer with a focus in PHP. Alongside our Director of Technology, you will be driving a variety of web development projects combining front and back-end programming for national clients. We are a small design and interactive studio so there is tremendous opportunity for growth and diverse work for national clients and innovative brands.

Tech Details
You should be a person who constantly desires to stay up-to-date on development trends, technologies and innovations. You should be an expert in PHP/MySQL development in an MVC framework. You'll distinguish yourself if you have in-depth knowledge of multiple languages, platforms and technologies including:

  • ASP.NET (2.0+)
  • JAVA
  • MySQL
  • Javascript (AJAX)
  • XHTML / CSS
  • Actionscript
  • Version control (Subversion/Git)

Other capabilities and experiences that are desired include: eCommerce experience, a web design sensibility, Flash skills and comfort with the Adobe CS Suite.

Responsibilities

  • Develop, maintain and support large, high-availability, web based internal applications and reporting tools; support high-traffic commercial websites
  • Interest in creating the next generation of interactive media applications
  • Research new platforms and architecture to support current and future business requirements
  • Ensure consistency and adherence to MODE's standards, processes, and policies for all projects.

Required Skills

  • 2+ years web development experience
  • experience in client facing communications
  • Computer Science degree or equivalent experience
  • Excellent analytical/problem solving skills, ability to think creatively and solve complex technical problems
  • Quality oral/written communication and interpersonal skills in order to effectively partner with the technologies and business communities
  • Ability to develop a clear understanding of client needs and plan applications to meet their needs.

    As a MODE team member, you'll be rewarded with:

  • A fun, friendly work environment
  • Competitive salary commensurate with experience
  • Casual dress code
  • Performance-based bonus
  • Generous paid vacation (19 floating days, 6 holidays)
  • 100% employee covered medical benefits
  • Possible relocation assistance
  • Great North Carolina weather

    If interested we ask that you write a cover letter including the following:

  • Why you are right for our position
  • Your salary requirements
  • A set of 3 urls that demonstrate work you are most proud of including a brief description of your role on each project

    Please send your cover letter and resume to jobs@modevisual.com with subject "Web Developer".

  • Link More Information
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    job post mode visual charlotte nc developer web job post mode visual charlotte nc developer web


    Andrei Zmievski's Blog:
    50% There
    December 20, 2006 @ 08:08:02

    Andrei Zmievski has posted an encouraging note on his blog about the progress of PHP6 concerning the number of functions that have been correctly converted to support Unicode.

    Well, PHP boys and girls, this feels like quite a milestone: 50% of the 3084 functions that are bundled with PHP 6 have been upgraded to support and work safely with Unicode.

    He includes a small chart beside the post as well showing where things are currently at like the safe vs unsafe functions.

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    unicode conversion function safe half unicode conversion function safe half


    Tobias Schlitt's Blog:
    Taint mode for PHP?
    December 19, 2006 @ 11:03:00

    Tobias Schlitt has a great (long) post responding to a proposal made on the php.internals mailing list for the inclusion of "taint mode" in upcoming PHP versions.

    Tobias starts with an overview of what "taint mode" is so that everyone's on the same page. His example involves the incoming and outgoing data usually involved in an application and how the incoming can be the most problematic when it comes to the values inside. This is where taint mode can come to the rescue. At its most basic level, it's a method for, assuming everything coming in is "tainted", creating a mechanism to automatically clean the data before it's even touched.

    With the basics down, Tobias looks back to the proposal for a few additional comments. He considers the proposal a great way to introduce the functionality to the language. There are some draw backs he mentions, though, including the additional overhead of working through every inputted value.

    Overall, I think this whole thing would be a great addition to PHP and I hope this could come for 6.0. What do you think?

    You can also check out some other opinions on the matter:

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    taint mode proposal basic insecure data opinion response taint mode proposal basic insecure data opinion response


    PHP 10.0 Blog:
    Production mode
    December 18, 2006 @ 08:43:00

    In an effort to get some thought going about ways to encourage security in PHP applications, Stas has posted an idea about a simplified php.ini setting - production=On.

    His idea is that, with this setting on, the PHP installation would:

    • disable display errors
    • disable phpinfo()
    • turn expose_php off
    • make max_execution_time/memory_limit reasonable
    • and possibly a few others that some developers forget to set correctly
    Comments on the post range from disagreement to suggestions on improvement and support.

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    production mode phpini setting phpinfo exposephp displayerrors production mode phpini setting phpinfo exposephp displayerrors


    PHP Security Blog:
    The Suhosin Patch, File Uploads, and Stealth Mode
    December 05, 2006 @ 10:02:00

    On the PHP Security Blog, there's two new posts concerning their Suhosin patch for PHP - one talking about a remote code execution vulnerability found in the uploadprogressmeter extension (which as already been corrected) and the other dealing with the "stealth mode" of the patch to find compatibility problems.

    As mentioned, the issue with the uploadprogress extension has been fixed and as been introduced into the PECL repository. The other post just mentions what the patch is doing to try to keep compatibility problems from happening due to back extensions and/or modules being loaded in an application.

    More details about the Suhosin patch can be found here.

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    stealth mode suhosin patch fileupload pecl extension module stealth mode suhosin patch fileupload pecl extension module



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