php pdo_pgsql file present but not recognized - php

Question

Running a DigitalOcean droplet on Ubuntu (20.4?)
I have userA with root permission. They are also connected to userA within the postgres db.
Due to the setup for the software I'm using, they require a specific username for the postgresdb. Just so I'm not exposing too much data online, we'll call that userB. That's both a linux and postgres user.
I'm running a php command that basically takes (uname, dbname, pdo, options) as input, and it's currently failing bc it can't locate the pdo file.
I've looked through a few posts. One suggested to uncomment all of the pgsql and pdo_pgsql lines in all of the php.ini files, which i've done, both for production, development, and the generic version of that file.
When I run the command as both userA and userB I get this error.
PHP Warning: PHP Startup: Unable to load dynamic library 'pdo_pgsql' (tried: /usr/lib/php/20190902/pdo_pgsql (/usr/lib/php/20190902/pdo_pgsql: cannot open shared object file: No such file or directory), /usr/lib/php/20190902/pdo_pgsql.so (/usr/lib/php/20190902/pdo_pgsql.so: undefined symbol: pdo_parse_params)) in Unknown on line 0
However, pdo_pgsql.so actually does exist in that location. (is it looking for a file just named pdo_pgsql and is instead finding pdo_pgsql.so?)
The php site says to run a
./configure
command, but it doesn't really say which folder configure is in. It's not a package I can install from cli. (https://www.php.net/manual/en/ref.pdo-pgsql.php)
Other pages say you have to install autoconf first (https://unix.stackexchange.com/questions/158960/can-not-run-configure-command-no-such-file-or-directory) however that has not made ./configure an available command for me.
I've also found a post saying that a conf file in apache needs to be updated to show the location of the PDO file, however I'm not yet running a server, I'm just running a php file that populates a pgsql db locally. (pgsql extension is not loading)
Running
php -i | grep PDO
gives
PHP Warning: PHP Startup: Unable to load dynamic library 'pdo_pgsql' (tried: /usr/lib/php/20190902/pdo_pgsql (/usr/lib/php/20190902/pdo_pgsql: cannot open shared object file: No such file or directory), /usr/lib/php/20190902/pdo_pgsql.so (/usr/lib/php/20190902/pdo_pgsql.so: undefined symbol: pdo_parse_params)) in Unknown on line 0
PDO
PDO support => enabled
PDO drivers => pgsql
PDO Driver for PostgreSQL => enabled
Though according to customer service from the API it should be returning
PDO
PDO support => enabled
PDO drivers => mysql, odbc, pgsql
PDO Driver for MySQL => enabled
PDO Driver for ODBC (unixODBC) => enabled
PDO Driver for PostgreSQL => enabled
Though I think they're giving multiple examples of different drivers depending on your db software of choice.
I'm not exactly sure what to do.
Update:
I've tried editing the php.ini file that is being used by php via
php -i | grep ini
I used
locate pdo_pgsql
to find the pdo_pgsql and pdo_pgsql.so filepaths. I have tried 4 different edits to the php.ini file. 2 being uncommenting (one at a time) the default pgsql extensions. 2 being different filepaths to the pdo_pgsql files that are found on my system through locate.
**extension=/usr/lib/php/20190902/pdo_pgsql.so**
sudo php file.php
PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/20190902/pdo_pgsql.so' (tried: /usr/lib/php/20190902/pdo_pgsql.so (/usr/lib/php/20190902/pdo_pgsql.so: **undefined symbol: pdo_parse_params**), /usr/lib/php/20190902//usr/lib/php/20190902/pdo_pgsql.so.so (/usr/lib/php/20190902//usr/lib/php/20190902/pdo_pgsql.so.so: **cannot open shared object file: No such file or directory**)) in Unknown on line 0
**extension=/var/lib/php/modules/7.4/registry/pdo_pgsql**
sudo php file.php
PHP Warning: PHP Startup: Unable to load dynamic library '/var/lib/php/modules/7.4/registry/pdo_pgsql' (tried: /var/lib/php/modules/7.4/registry/pdo_pgsql (/var/lib/php/modules/7.4/registry/pdo_pgsql: **file too short**), /usr/lib/php/20190902//var/lib/php/modules/7.4/registry/pdo_pgsql.so (/usr/lib/php/20190902//var/lib/php/modules/7.4/registry/pdo_pgsql.so: **cannot open shared object file: No such file or directory)**) in Unknown on line 0
Could not open input file: file.php
**extension=pgsql**
sudo php file.php
**PHP Warning: Module 'pgsql' already loaded in Unknown on line 0**
Could not open input file: file.php
**extension=pdo_pgsql**
sudo php file.php
PHP Warning: PHP Startup: Unable to load dynamic library 'pdo_pgsql' (tried: /usr/lib/php/20190902/pdo_pgsql (/usr/lib/php/20190902/pdo_pgsql: **cannot open shared object file: No such file or directory**), /usr/lib/php/20190902/pdo_pgsql.so (/usr/lib/php/20190902/pdo_pgsql.so: **undefined symbol: pdo_parse_params**)) in Unknown on line 0
Could not open input file: file.php
output as requested by user below
$ php -v
PHP 7.4.3 (cli) (built: Mar 2 2022 15:36:52) ( NTS )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies
with Zend OPcache v7.4.3, Copyright (c), by Zend Technologies
$ dpkg -l|grep pgsql
ii php-pgsql 2:7.4+75 all PostgreSQL module for PHP [default]
ii php7.4-pgsql 7.4.3-4ubuntu2.10 amd64 PostgreSQL module for PHP
$ dpkg -l|grep php
ii php-common 2:75 all Common files for PHP packages
ii php-pgsql 2:7.4+75 all PostgreSQL module for PHP [default]
ii php7.4-cli 7.4.3-4ubuntu2.10 amd64 command-line interpreter for the PHP scripting language
ii php7.4-common 7.4.3-4ubuntu2.10 amd64 documentation, examples and common module for PHP
ii php7.4-json 7.4.3-4ubuntu2.10 amd64 JSON module for PHP
ii php7.4-opcache 7.4.3-4ubuntu2.10 amd64 Zend OpCache module for PHP
ii php7.4-pgsql 7.4.3-4ubuntu2.10 amd64 PostgreSQL module for PHP
ii php7.4-readline 7.4.3-4ubuntu2.10 amd64

Answer 1

If something does not work on your DEV enc, do not TRY it on the PROD.. this beats the purpose of having a DEV env..
in php.ini you should already have an example on how to enable pgsql:
extension=pdo_pgsql
not module=
I do not see what is your PHP version, but make sure you install the appropriate version of php7.X-pgsql as it seems you have the wrong version of the library..
You can maybe add to your question the output of:
dpkg -l|grep pgsql
dpkg -l|grep php
php -v