Found this site from one of the poster's signature on www.sitepoint.com. Its not detailed but a great reminder of new things in PHP; at least I think it is. It also contains great links that are great read. Just wanted to share with you all.
You are here
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Tips and tools to optimize your website's speed
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Welcome to www.rattanpal.com, home to your web solutions. I will be using my site to post solutions about the issues that I came across in the hopes that others will benefit from these.