1. PHP 실행 확인

# php56 -v
PHP 5.6.38 (cli) (built: Sep 12 2018 08:34:08)
Copyright (c) 1997-2016 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2016 Zend Technologies

2. 테스트 프로그램 작성

# cat hello.php
<?php
echo 'Hello world!';
?>

3. 실행

# php56 hello.php
Hello world!