A PHP script is executed on the server, and the plain HTML result is sent back to the browser.

Basic PHP Syntax
A PHP script can be placed anywhere in the document.

A PHP script starts with ?php and ends with ?:

// PHP code goes here
The default file extension for PHP files is “.php”.

A PHP file normally contains HTML tags, and some PHP scripting code.

Below, we have an example of a simple PHP file, with a PHP script that uses a built-in PHP function “echo” to output the text “Hello World!” on a web page:…

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