The always nice and awesome and total cool Switch Statements :-(

switch.php

<?php

    /**
     * Returns a PDO parameter constant to bind a variable with
     *
     * @param  string $type  Which variable type to check
     *
     * @return int           PDO parameter constant
     */
    public static function getBindConstant($type)
    {
        switch ($type) {
            case 'bool':
                return PDO::PARAM_BOOL;
                break;
            case 'int':
                return PDO::PARAM_INT;
                break;
            case 'null':
                return PDO::PARAM_NULL;
                break;
            case 'string':
            default:
                return PDO::PARAM_STR;
                break;
        }
    }

// refactored:

    public static function getBindConstant($type)
    {
        $match = [
            'bool'   => PDO::PARAM_BOOL,
            'int'    => PDO::PARAM_INT,
            'null'   => PDO::PARAM_NULL,
            'string' => PDO::PARAM_STR,
        ];
        return isset($match[$type]) ? $match[$type] : PDO::PARAM_STR;
    }