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PHP & MySQL: Novice to Ninja, 5th Edition by Kevin Yank

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Chapter 3Introducing PHP

PHP is a server-side language. This concept may be a little difficult to grasp, especially if you’ve only ever designed websites using client-side languages like HTML, CSS, and JavaScript.

A server-side language is similar to JavaScript in that it allows you to embed little programs (scripts) into the HTML code of a web page. When executed, these programs give you greater control over what appears in the browser window than HTML alone can provide. The key difference between JavaScript and PHP is the stage of loading the web page at which these embedded programs are executed.

Client-side languages like JavaScript are read and executed by the web browser after downloading the web page (embedded programs and all) from the ...

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