1.download
2.environment setting
3.
echo %PATH%
php -v
4.php -S localhost:4000
5.make a directory
6.
site.php
<!DOCTYPE html>
<html lang="en" dir="ltr">
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
<?php
echo("hello world");
?>
</body>
</html>
7.
http://localhost:4000/www/site.php