check php version in shell code example

Example 1: checking php version

<?php
echo 'PHP version: ' . phpversion();
?>

Example 2: php version command linux

# php --version
PHP 5.4.16 (cli) (built: Mar  7 2018 13:34:47) 
Copyright (c) 1997-2013 The PHP Group
Zend Engine v2.4.0, Copyright (c) 1998-2013 Zend Technologies