prepare(...) etc public function pdo_connect() { $db_port = defined('DB_PORT') && DB_PORT ? ';port=' . DB_PORT : ''; $db_host = defined('DB_HOST') && DB_HOST ? ';host=' . DB_HOST : ''; try { $pdo = new PDO(DB_TYPE . ':dbname=' . DB_NAME . $db_host . $db_port, DB_USER, DB_PASS); } catch (Exception $e) { print "

Exception while creating PDO object:" . $e->getMessage() . "

"; exit(101); } $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); if (DB_TYPE == "pgsql") { $pdo->query("set client_encoding = 'UTF-8'"); $pdo->query("set datestyle = 'ISO, european'"); $pdo->query("set TIME ZONE 0"); $pdo->query("set cpu_tuple_cost = 0.5"); } else if (DB_TYPE == "mysql") { $pdo->query("SET time_zone = '+0:0'"); if (defined('MYSQL_CHARSET') && MYSQL_CHARSET) { $pdo->query("SET NAMES " . MYSQL_CHARSET); } } return $pdo; } public static function instance() { if (self::$instance == null) self::$instance = new self(); return self::$instance; } public static function pdo() : PDO { if (self::$instance == null) self::$instance = new self(); if (!self::$instance->pdo) { self::$instance->pdo = self::$instance->pdo_connect(); } return self::$instance->pdo; } public static function sql_random_function() { if (DB_TYPE == "mysql") { return "RAND()"; } else { return "RANDOM()"; } } }