What is the command to restart PHP on Linux?

In Linux, restarting PHP is usually achieved by restarting the web server. The specific command depends on the web server you are using.

1. If you are using an Apache server, you can restart the Apache service using the following command:
   sudo service apache2 restart
2. If you are using an Nginx server, you can restart the Nginx service with the following command:
   sudo service nginx restart
3. If you are using a different web server, you can refer to its documentation or official guidelines to find the corresponding restart command.