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DevShed sheds some light on almost every aspect of PHP programming. It has tutorials from building simple application to building e-commerce applications, and techniques inbetween.
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All sorts of different and useful tutorials can be found here. Need to know how to build a certain type of application? The authors at Zend have probably done it already and written a tutorial on it here.
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One of the most visited PHP sites on the web, HotScripts.com has a seemingly-unlimited supply of PHP scripts, all contributed from authors around the globe. You can also submit a link to your scripts for free, and get your scripts ranked.
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