RE: What is PHP?
PHP (Hypertext Preprocessor) is the most widely used programming language for website and web application development. It is an open-source, server-side scripting language useful for creating dynamic websites.
Nice, but what does that mean? An example:
Example #1 An introductory example
<!DOCTYPE html>
<html>
<head>
<title>Example</title>
</head>
<body>
<?php
echo "Hi, I'm a PHP script!";
?>
</body>
</html>