Noupe.com has posted their list of the top twenty useful components and tutorials that could be useful for PHP developers in their day to day work. The list includes:

• PHP components: Autosuggest
• Sanitize and Validate Data with PHP Filters
• Building Your First Simple CMS
• How to Make a Password Strength Meter Like Google
• How to Validate Forms in both sides using PHP and jQuery
• Smart Image Resizer

When you combine some neat functionality courtesy of PHP with the cleverness of javascript you can produce some pretty cool results. [... This list is] the best 20 FREE PHP Components and Tutorials that you will likely need in many of your projects, they are all of the highest quality and more or less easy to configure. Give them a try.