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PHP 5 Unleashed by John Coggeshall

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Appendix B. HTTP Reference

In this appendix we'll discuss the HTTP standard from the perspective of a PHP programmer, with a look at the functions and libraries you might use.

What Is HTTP?

HTTP is to Web pages what FTP is to file access. It is the core protocol behind the World Wide Web. Every click on a Web page, every image that is displayed, every style sheet that is requested ...

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