PHP Configuration class

Created this little config class, any room for improvements? Think I have done an alright job but would like to know if any improovements could be made?

<?php
defined("SECURE") or exit('Please define SECURE keyword to continue.');
class config
{
    private $configValues;
    private $configFile;

    public function __construct()
    {
        $configValues = array();
    }

    public function loadConfiguration($configFile = "C:\Users\ashle\Miracle\config\config.ini")
    {
        if (!file_exists($configFile))
            loadDefault();

        $content = file($configFile);
        foreach ($content as $line)
            $this->setConfig(explode("=", $line)[0], explode("=", $line)[1]);
    }

    private function loadDefault()
    {
        /* DEFAULT CONFIG SETTINGS!!
           THIS SHOULD NOT BE THE CASE... */

        setConfig("database.host", "localhost");
        setConfig("database.username", "root");
        setConfig("database.password", "");
        setConfig("database.title", "mydb");
        setConfig("database.port", "3306");
    }

    private function setConfig($name, $value)
    {
        $this->configVlaues[$name] = $value;
    }

    public function getConfig($name)
    {
        return $this->configValues[$name];
    }
}
?>