This one, www.php.net (especially www.php.net/tut.php), www.zend.com (www.zend.com/zend/tut/), http://www.hvt-automation.nl/yapf/, www.devshed.com has a PHP section as does www.faqts.com; all of them have links sections. There's also something at www.thescripts.com, www.planetsourcecode.com and www.tutorialfind.com.
But, more importantly, to paraphrase Eric S. Raymond: "Read code and write code". No amount of staring at tutorials will replace the need for this; there is no royal road.