class my_connect{
private $conn;
private function get_conn() {
$conn=new mysqli('localhost',"root","","test",3306);
$conn->set_charset("utf8");
return $conn;
}
private function __destruct() {
if(isset($this->conn)){
$this->conn->close();
}
}
static function get_instance() {
$new_conn=new my_connect() ;
$conn=$new_conn->get_conn() ;
return $conn;
}
}
当我执行 $conn=my_connect::get_instance(); 到析构函数的时候 $conn变量为null
也就是没有执行 $this->conn->close();
php
if(isset($this->conn)){改下就好
if($this->conn){
private function get_conn
改为
public function get_conn
即可这个类你可以优化优化,还有待优化