How to check PHP version on Ubuntu

  1. We’ll start off with the quickest method. Open a command line terminal and type the following command. 
    $ php -version
PHP 7.4.3 (cli) (built: May 26 2020 12:24:22) ( NTS )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies
    with Zend OPcache v7.4.3, Copyright (c), by Zend Technologies
  2. What if we want a little more in depth information? You can start a PHP interactive shell (again, from the command line) and use the phpinfo function. This will return a ton of information, but will show the PHP version at the top. 
    $ php -a
Interactive mode enabled

php > phpinfo();
phpinfo()
PHP Version => 7.4.3
...

php > exit
  3. Lastly, we could use the phpinfo function again, but inside of a php file. The perk of this method is that all the information will be formatted nicely for us and viewable inside a browser. We have a full guide on how to create a phpinfo.php page, but it basically just involves saving a PHP file with the following line of code and then accessing it from your browser. 
    <?php phpinfo(); ?>
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