How does PHP echo’s a “Hello World”? – Behind the scene

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Have you ever wondered how PHP echo's a "Hello World" for you on the browser? Even I didn't until I read about the PHP internals and extensions. I thought may be a few out there will be interested in exploring the other side of PHP, so here we go. In my last post I discussed in brief "How your browser reaches to my server when you type http://abhinavsingh.com in address bar?". Read through if you have missed out on that. Here I will discuss in brief "How does PHP churns out the content requested on the webpage?" An Overview Here...