docker-php-extension-installer/scripts/tests/pdo_sqlsrv

#!/usr/bin/env php
<?php

require_once __DIR__ . '/_bootstrap.php';

try {
    new PDO('sqlsrv:server=localhost; Authentication=SqlPassword; ConnectRetryCount=0; Database=example; LoginTimeout=1', 'userName', 'password');
} catch (PDOException $x) {
    if (stripos($x->getMessage(), 'This extension requires the Microsoft ODBC Driver for SQL Server') !== false) {
        fwrite(STDERR, trim($x->getMessage() . "\n"));
        exit(1);
    }
}