PHP (recursive acronym for PHP: Hypertext Preprocessor) is a widely-used open source general-purpose scripting language that is especially suited for web development and can be embedded into HTML.
EXAMPLE #1:
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>My First Php Example</title>
</head>
<body>
<?php
echo "Hello there, I'm a PHP!";
?>
</body>
</html>