We have a requirement that needs to downgrade PHP from 8.1 to 7.1 in our Ubuntu 18 server.
sudo update-alternatives --set php /usr/bin/php7.1
After the downgrade, we're seeing PHP Startup error everytime we check php -v
Below is the exact error text:
PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/20160303/propro.so' - /usr/lib/php/20160303/propro.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/20160303/raphf.so' - /usr/lib/php/20160303/raphf.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/20160303/http.so' - /usr/lib/php/20160303/http.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP 7.1.33-47 ubuntu18.04.1 deb.sury.org 1 (cli) (built: Jun 27 2022 08:15:45) ( NTS )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.1.0, Copyright (c) 1998-2018 Zend Technologies
with Zend OPcache v7.1.33-47 ubuntu18.04.1 deb.sury.org 1, Copyright (c) 1999-2018, by Zend Technologies
The missing libraries are really not found in the said directory as I checked.
/usr/lib/php/20160303
We have tried reinstalling as suggested from other forum with same error.
sudo apt-get install --reinstall `dpkg -l | grep 'ii php7.1' | awk '{ printf($2" "); next}'`
It works for them but not in ours.
I hope I can get help here. Thanks in advance.
By the way, I'm not a Linux and PHP developer. Just starting getting into it.
CodePudding user response:
--reinstall
will only reinstall the things that are installed, but it looks like you actually removed a number of modules. The propro
, raphf
, and http
modules are not standard and are not installed by default. If you don't actually need/use them, you can just disable them so that they don't try to load:
phpdismod propro raphf http
However, if your app requires these modules, you'll need to explicitly add them:
apt install php7.1-propro php7.1-raphf php7.1-http