Php is a scripting language that runs:
The codebase for Facebook’s front end now stands at more than 10.5 million lines of actual code (without comment lines and blank lines), of which nearly 8.5 million are written in PHP.
The below hello-world.php script output:
<html>
<head>
<title>Hello World</title>
</head>
<body>
<?php echo '<p>Hello World</p>'; ?>
</body>
</html>