I performed sudo apt-get upgrade. $ sudo apt-get upgrade
After the upgrade, I noticed some php 5.7 files and folders in the etc directory For example: I saw /usr/bin/php7.1 and /etc/php/7.0, 7.1, 7.2, 7.3
I'm not sure why 7.1 files are installed as I didn't intend to do that and the php app doesn't work with PHP7.
I'm not sure after the upgrade if /etc/alternatives/php got symlinked to /usr/bin/php7.1 how do I confirm if upgrade modifies symlinks?
So, I performed to be sure 5.6 modules/extensions is loading and not 5.7
$ sudo update-alternatives --set php /usr/bin/php5.6
I then checked the symlinks: I checked for symlinks
ubuntu@ip:/etc/alternatives$ ls -alth | grep php lrwxrwxrwx 1 root root 15 Aug 27 14:05 php -> /usr/bin/php5.6 lrwxrwxrwx 1 root root 31 Aug 27 14:05 php.1.gz -> /usr/share/man/man1/php5.6.1.gz lrwxrwxrwx 1 root root 16 Aug 25 02:21 phpize -> /usr/bin/phpize5 lrwxrwxrwx 1 root root 32 Aug 25 02:21 phpize.1.gz -> /usr/share/man/man1/phpize5.1.gz lrwxrwxrwx 1 root root 20 Aug 25 02:21 php-config -> /usr/bin/php-config5 lrwxrwxrwx 1 root root 36 Aug 25 02:21 php-config.1.gz -> /usr/share/man/man1/php-config5.1.gz lrwxrwxrwx 1 root root 21 Mar 16 2017 libphp7 -> /usr/lib/libphp7.1.so
and found libphp7 is symlinked to 7.1. Should it matter? We don't want 7.1 modules or extensions to load as we are on php5.6 but will symlink libphp7.1 create any problems in the future? if so how to fix this and get back 5.6.37?