该楼层疑似违规已被系统折叠 隐藏此楼查看此楼
class ConnectionPool { private static $_instance; private $_pool = []; public static function getInstance() { if (!self::$_instance) { self::$_instance = new self(); } return self::$_instance; } public function setConnection($name, $pdo) { // 如果已经存在，直接覆盖，不想覆盖自行判断 $this->_pool[$name] = $pdo; } public function getConnection($name) { if (!array_key_exists($name, $this->_pool[$name])) { throw new \Exception(*名为 "* . $name . *" 的数据库连接不存在*); } return $this->_pool[$name]; } private function __construct() { // }}-----------------------------------------------------------------------ConnectionPool::getInstance()->setConnection(*default*, new \PDO());function mysql_query(...) { $pdo = ConnectionPool::getInstance()->getConnection(*default*); ....}写了个简单的连接池给楼主，不想用Singleton自行修改，但最好不要做成静态类