Fatal error: Call to a member function query() on a non-object in

Question

I am using pdo and I have set the connection string in a config file such as

$db = new PDO(\"mysql:host=localhost;dbname=mydbname\", \'root\', \'pass\');
         


        

Answer 1

I recommend to use a good pattern called Registry. And a simple implementation in PHP:

abstract class Registry {

    private static $_tools = array();

    public static function set($name, $value) {
        self::$_tools[$name] = $value;
    }

    public static function get($name) {
        return (isset(self::$_tools[$name]) ? self::$_tools[$name] : null);
    }

}

Usage:

$db = new PDO("mysql:host=localhost;dbname=mydbname", 'root', 'pass');
Registry::set('db', $db);

//In some other part of code
$query = Registry::get('db')->query("select aUsername,aPassword,aOnline,aLastlogin from tbl_admins where aUsername = '$username'");