SQL concatenation helper for Laravel 4

DBUtil.php

<?php

class DBUtil {

	/**
	 * Concatenate fields using the driver's valid SQL operator.
	 *
	 * @param array
	 *
	 * @example
	 *  
	 *     DBUtil::concat(array("first", "' '", "last"));
	 *
	 *     => "CONCAT(first, ' ', last)" // MySQL
	 *     => "first + ' ' + last"       // SQL Server
	 *     => "first || ' ' || last"     // Default
	 */
	public static function concat($values = array())
	{
		$env = Config::get('database.default');
		$driver = Config::get("database.connections.{$env}.driver");

		switch ($driver) {
			case 'mysql':
				$result = implode(", ", $values);
				return "CONCAT({$result})";
			case 'sqlsrv':
				return implode(" + ", $values);
			default:
				return implode(" || ", $values);
		}
	}
}