[root@localhost htdocs]# php -v
-bash: php: command not found
[root@localhost bin]# php -v
PHP 7.1.7 (cli) (built: Jul 19 2017 13:17:29) ( NTS )
Copyright (c) 1997-2017 The PHP Group
Zend Engine v3.1.0, Copyright (c) 1998-2017 Zend Technologies
原文：http://adamcrab.blog.51cto.com/842470/1949582