setting.php

<?php

class Setting {

    public $values=array();
    protected static $_instance = null;

    private $config;

	function __construct() {
		$this->config = yaml_parse_from_file('file.yml');
	}

	public function get($value) {
		return $this->config[$value];
	}

    public static function getInstance() {
        if (self::$_instance === null) {
            $c = __CLASS__;
            self::$_instance = new $c;           
        }
        return self::$_instance;
    }
}

?>