Some of the tips listed so far include:

• How to free Symfony2 from the sandbox tutorial (with some help from Git)
• Doctrine in the Real World - Presentation from Symfony Live 2011
• The Path to Symfony in the USA- Presentation from Symfony Live 2011
• Form naming
• Translate form labels inside Twig templates

Check out the full blog for more tips and links to presentations.

• Using predefined interfaces
• The streams API
• Defining constant defaults
• The speed differences in reading parts of arrays
• Boolean attribution

There's also a full discussion on closures/lambdas that no "features" post on PHP would be complete without. Have some tips to share? Add yours to the post too!

Performance is a key factor for any successful website. And since WordPress is becoming more popular than ever, it will only be at its best when raised in the proper conditions. Here are a few things to try if you find that your WordPress site is not performing as well as it could be due to high traffic or hidden issues you don't know about.

Here's their list of tips and tricks:

• Upgrade to latest WordPress release
• Remove unnecessary Plugins & upgrade current ones
• Minimize PHP and database queries
• Optimize and Repair your Database from myPhpAdmin
• Use Reliable image hosting service
• Optimize your images with this great tool
• Install WP Super Cache Plugin
• PHP Speedy WP
• WP CSS
• DB Cache
• Speed up access to your favorite frameworks via the AJAX Libraries API
• Display page loading time + number of queries
• Optimize DB

So i am planning to star writing an open book (right now it is a blog, when we will have thousands or recipes we will make it a book) which will follow cookbook approach for Facebook application developers. I will highlight common problems (there are numbers of problems with no solutions in their wikis) and their solutions which I've learned in my last one and half year journey as an application developer on Facebook platform.

Several topics have already been covered including:

• facebook reveals status api - how to use it?
• how to resize facebook popup dialog box
• how to add profile tab for your facebook application
• how to successfully update all of your user's profile offline, at once!
• publishing on your friend's mini feed (no session key)

Enter, The PHP Anthology a book that proves that you don't need a computer science degree to take advantage of the powerful features of PHP 5.

Save time, and eliminate the frustration of completing PHP tasks, with this comprehensive collection of ready-to-use solutions. If you're building web applications with PHP you'll never let this book out of your sight!

Authors for this edition are PHP notables Ben Balbo, Harry Fuecks, Davey Shafik, Ligaya Turmelle and Matthew Weier O'Phinney. The book covers a huge range of topics like using strings, dates and times, working with files, image manipulation and error handling.

Check out the book's main page for a link to get a free sample of the content, too! You can order the book for either $49.90 USD (PDF and hard copy), $39.95 USD for just the hard copy or $29.95 USD for the PDF copy only.

Check out some blogs from the authors: Matthew Weir O'Phinney, Davey Shafik and Ligaya Turmelle

I was curious how this works, as it seemed pretty different from previous similar libraries (PDFLib, FPDF), that offered a programmatic API to generate PDF DOMs instead of a markup language.

They describe how it works, what's included with the download and how it uses output buffering to get the job done as well as a few updates and further tips on its usage.

The MySQL list includes things like:

• MySQL is interpreted from right to left so you should put the most significant limiters as far to the right as possible.
• Use indexes on the columns in the WHERE clause and on the columns you want to ORDER BY.
• Sometimes mysql_free_result() end up wasting more memory than it saves. Check the difference with memory_get_usage().
• Use NOT NULL as default value as much as you can, it speeds up execution and saves one bit.

And the PHP list includes:

• When echoing strings it's faster to separate them by comma instead of dot.
• Unset your variables to free memory, especially large arrays.
• Many code blocks might slow down the interpretation a little bit.

There's also all sorts of other tips down in the comments as well.