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PHP OOP Database class using MySQLI and Singleton pattern. Only one instance of the class will be made, this requires less memory.
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| <?php | |
| /* | |
| * Mysql database class - only one connection alowed | |
| */ | |
| class Database { | |
| private $_connection; | |
| private static $_instance; //The single instance | |
| private $_host = "HOSTt"; | |
| private $_username = "USERNAME"; | |
| private $_password = "PASSWORd"; | |
| private $_database = "DATABASE"; | |
| /* | |
| Get an instance of the Database | |
| @return Instance | |
| */ | |
| public static function getInstance() { | |
| if(!self::$_instance) { // If no instance then make one | |
| self::$_instance = new self(); | |
| } | |
| return self::$_instance; | |
| } | |
| // Constructor | |
| private function __construct() { | |
| $this->_connection = new mysqli($this->_host, $this->_username, | |
| $this->_password, $this->_database); | |
| // Error handling | |
| if(mysqli_connect_error()) { | |
| trigger_error("Failed to conencto to MySQL: " . mysql_connect_error(), | |
| E_USER_ERROR); | |
| } | |
| } | |
| // Magic method clone is empty to prevent duplication of connection | |
| private function __clone() { } | |
| // Get mysqli connection | |
| public function getConnection() { | |
| return $this->_connection; | |
| } | |
| } | |
| ?> |
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