Call to ldap_connect() on PHP and HREL 8 fails, works on RHEL 7.9

Question

I have a PHP app that calls ldap_connect() on RHEL 8.1 which fails. I am migrating this PHP app from RHEL 7.9 to RHEL 8.1 and from PHP 5.4.16 to PHP version 8.3.9. On the new server, when my code reaches ldap_connect() it exits with no error.

Looking at the output from info.php, on the old server I have the following modules installed. They are not installed on the new server. I am not sure how to install these modules, which I believe is my problem.

    mod_authnz_ldap mod_auth_openidc mod_authnz_external mod_php

I am calling ldap_connect() as follows, where $host is the ldap host, the same one that works on my old server:

    $mydap= ldap_connect($host) or die(‘Error connecting to LDAP’);

I have also read where I need to edit my php.ini file to uncomment the line: extensions=php_ldap.so

However, I don’t have a line like that in /etc/php.ini This command, generates the following output:

locate php.ini
    /etc/php.ini
    /usr/share/doc/php-common/php.ini-development
    /usr/share/doc/php-common/php.ini-production