We can easily execute a PHP file on our remote server (using SSH) as part of a Bash script:

ssh host "php /scripts/clear-cache.php"

In the example above, we run the clear-cache.php file on our remote server (for example, within a Bash script that deploys a new version to production).

Of course, replace host with the actual host defined in the SSH config file or use the connection details (user@host).

As mentioned in php.net, the -f option (php -f) is optional so we can directly provide the path of the file that needs to be run.