"Required extension or module 'ldap' is not installed or loaded

So you ensured that php_ldap.dll is located in your extension_dir as configured in php.ini, that extension=php_ldap.dll is uncommented in php.ini, restarted the web server, and after that the php.exe -m | findstr ldap command still doesn't report the extension as enabled?

(Link from Bitnami support.)