Well, we need to run the CLI (command-line interface or executable) version of PHP, we need to use the full path (your phpinfo could help you on this, or ask your hosting provider!) then, we need to pass as a parameter or argument the PHP file, use full path again (NOTE: Usually, shared server use the home directory to hold their users and websites, so your path will be /home/your_username/public_html, again, "public_html" is one of the most used folders, but it could be different, as website, yourdomain.com or anything. Also, if you own a private server, your web path is probably /var/www)