How can one ensure that there are no remnants or dependencies left from PHP 5 after installing PHP 7?

To ensure that there are no remnants or dependencies left from PHP 5 after installing PHP 7, it is important to thoroughly uninstall PHP 5 and its associated packages before installing PHP 7. This can be done by removing the PHP 5 packages using the package manager of your operating system and then installing PHP 7 from the official repositories. ```bash # Remove PHP 5 packages sudo apt-get purge php5 sudo apt-get autoremove # Install PHP 7 sudo apt-get install php7.0 ```