PHP ExamplesLesson 83Free preview

PHP Server

This lesson is part of PHP · All levels

Summary

PHP runs on the server side: the script is executed on the computer where PHP is installed, and the result is sent to the browser as HTML. During that process PHP provides superglobal variables such as $_SERVER, $_GET, and $_POST that contain information about the request and server environment. Understanding this model lets you know which parts are safely hidden from the user.

Key points

PHP is executed on the server so the original source code never gets to the browser.
$_SERVER['REQUEST_METHOD'] indicates GET or POST, $_SERVER['QUERY_STRING'] contains the URL query.
Forms are sent using the GET (data in URL) or POST (data in request body) methods.
The input data from the request must be validated before use or storage.

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