Convert an Azure Connection String for MySQL into a PDO resource

azureConnectionStringToPdo.php

<?php
declare(strict_types=1);

/**
 * Example usage:
 *
 * $connString = 'Database=localdb;Data Source=127.0.0.1:12345;User Id=dbuser;Password=$3cR37!';
 * $pdo = azureConnectionStringToPdo($connString);
 */

/**
 * Converts an Azure Connection String into a PDO
 * resource.
 *
 * @param string $connectionString
 * @return PDO
 * @throws PDOException
 */
function azureConnectionStringToPdo(string $connectionString): PDO
{
    $connArray = explode(';', $connectionString);
    $connItems = [];
    foreach ($connArray as $pair) {
        list ($key, $value) = explode('=', $pair);
        $connItems[$key] = $value;
    }
    list ($host, $port) = explode(':', $connItems['Data Source']);
    $dsn = sprintf(
        'mysql:host=%s;port=%d;dbname=%s',
        $host, $port, $connItems['Database']
    );
    return new PDO($dsn, $connItems['User Id'], $connItems['Password']);
}