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Showing results for tags 'singleton design pattern'.
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I have multiple scripts referring to one another and it is getting a little confusing with database calls. I stumbled upon the singleton method, and I am trying to use it to create a Database class that will make sure there is only one connection at a time. This is what I have: class Database{ //Store the single instance of Database private static $m_pInstance; private function __construct(){ $mysqli = new mysqli($dbhost, $dbuser, $dbpass, $db); if ($mysqli->connect_error) { die('Connect Error (' . $mysqli->connect_errno . ') ' . $mysqli->connect_error); } } public static function getInstance() { if(!self::$m_pInstance) { self::$m_pInstance = new Database(); } return self::$m_pInstance; } } My connection definitions are stored in a cfg.php file which is required by this script. For the most part I understand how this works, but not well enough to understand why it isn't working. Here is the reference to this database: $mysqli = Database::getInstance(); Can someone help me figure out what I am doing wrong? The connection fails when I run it. It works when I put the above reference into a comment and simply connect with this: $mysqli = new mysqli($dbhost, $dbuser, $dbpass, $db); if ($mysqli->connect_error) { die('Connect Error (' . $mysqli->connect_errno . ') ' . $mysqli->connect_error); } Thanks.