Refactoring neither fixes bugs nor adds new functionality, though it might precede either activity. Rather it improves the understandability of the code and changes its internal structure and design, and removes dead code, to make it easier to comprehend, more maintainable and amenable to change. Refactoring is usually motivated by the difficulty of adding new functionality to a program or fixing a bug in it.

He's broken it out into a few topics with the suggestions underneath - things like looking at the "Big Picture", avoiding "Extreme Abstraction" and ensuring that your "Error Handling" is up to where it should be.

You may recall PHP Groups being created over a year ago for the purpose of networking together the leaders and organizers of PHP user groups around the world. I've been very bad about keeping things moving on this front, but I want to pick things back up and get us talking again.

If you'd like to subscribe to the list, send an email to ug-admins-subscribe [at] lists.php.net. If you don't want to subscribe but still want to keep track of what's happening, point your news reader to news://news.php.net/ug.admins.

Following our tutorials on uploading files and listing files, this tutorial will walk you through deleting files from a directory. This is done using the unlink() function.

Their example is pretty simple (as is the concept) - they show how to check to be sure that the file you want to remove isn't in use/open and then issue the unlink to remove it from the file system.

• Unvalidated Parameters
• Broken Access Control
• Broken Account and Session Management
• Cross-Site Scripting (XSS) Flaws
• Buffer Overflows
• Command Injection Flaws
• Error Handling Problems
• Insecure Use of Cryptography
• Remote Administration Flaws
• Web and Application Server Misconfiguration

Each item on the list has a bit of detail (and sometimes some code) to help point out the problem. Some of them even have references to external sources and packages to help you solve the problems.

I am pretty happy to announce that I have just deployed a new version of the symfony project website with a brand new "Plugins" section (look at the top menu entries) to replace the Trac plugin management system.

The new section has a listing of all of the available plugins (can be filtered) and dedicated pages for each of them with things like license, version and release information. You can also search the plugins based on keywords and authors. Developers adding their plugins have a full admin interface and uses the Trac accounts to manage access.

Wordpress is a CMS that was built for blogging but many people have repurposed it for magazines, newspapers, blog networks and all sorts of other goodies! But did you know you can hack your Wordpress blog to be a no-cost solution for a social network? Well you can, and here's fifteen plug-ins that will let you do it.

Some of the packages they link to include Ajaxd WordPress, Profiles, Quick SMS, Invite Friends and SezWho.

I hope this all will lead to a few people to step up and really start getting involved deeply in emPHPower. Aside from this Sebastian has handed in a BOF session on emPHPower for OSCON. I hope this one will work out.

A spot has also been set aside at the upcoming Zend/PHP Conference & Expo's unconference for someone to speak on the subject and to get a feel for things from the business perspective. Lukas has also been working up more details about the effort and has set up a mailing list to help with collaboration.

Operator overloading is a programming language features that allows operators to act differently depending on the type of data they are operating on. Since OOP lets us create custom types (classes), there are plenty of opportunities to do useful and interesting code manipulations using operator overloading.

He talks about magic functions, the additions that the SPL made, the PECL addition operator and how much its currently being discussed on the PHP internals list.

The last couple of weeks have been quite the experience for me. I was part of a big layoff at my former company, which was interesting. I've never been in that position before, and it's hard not to take it personally. [...] Before the face-to-face portion, I chatted with the owner and head programmer on a conference call, and they ended up sending me a technical assessment quiz.

In the quiz, there was one question the prompted him to come up with his tips - ten things that you can do to keep your code clean, lean and easy to maintain. His tips include things like "use single-quotes around array indexes", "don't use open short tags" and "document your code". Some of the suggestions don't make that much of a difference, but others (like the documentation one) can make the world of difference down the line.

PHP has many functions that help us to implement Internet and/or networking protocols. In this article, we will look at how to implement some of those protocols using PHP.

They introduce the FTP functions for PHP (a basic list, PHP manual style) and include the code - the CSS to make it easier to use and the PHP code to make the FTP connection and grab the remote file listing. A screenshot is included to give you an idea of the end result.