Change the default PHP version from multiple PHP version (Version 7.0 to Version 7.1)
Disable the current php version $ sudo a2dismod php7.0 Restart the apache $ sudo systemctl restart apache2 Enable the expect php version $ sudo a2enmod php7.1 ** If problem arise then the following two line $ sudo apt purge libapache2-mod-php7.1 libapache2-mod-php $ sudo apt install libapache2-mod-php7.1 libapache2-mod-php Enable the expect php version $ sudo a2enmod php7.1 Restart the apache $ sudo systemctl restart apache2 Check the php version $ php -v Finally set the php version $ sudo update-alternatives --set php /usr/bin/php7.1 Check the php version $ php -v Restart the apache2 $ sudo systemctl restart apache2