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understanding php

PHP is a scripting language that helps you create dynamic web sites. You can think of PHP—and any “server-side” scripting option (ASP, JSP, etc.)—as a go-between. It transfers information (such as a search query) from the user to the backend database or application; it then takes the results from the application and turns them into a web page.

For instance, some sites serve personalized information to returning customers (“Welcome back, June! The weather in New York is still awful!”) Server-side scripts, like PHP, make this possible. They grab information about the user who requested the page, and pass it to the backend application, which runs on the server. The application decides what to do, based on what the script told it (Print the text: “Welcome back June!”), and the script translates that into a web page. All this usually happens in a matter of milliseconds.


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