Warning: mysqli_connect(): (HY000/2002): Connection refused in /home/my.tailieutracnghiem.net/public_html/dbconnect.php on line 2
Failed to connect to MySQL1: Connection refused
Warning: mysqli_set_charset() expects parameter 1 to be mysqli, boolean given in /home/my.tailieutracnghiem.net/public_html/dbconnect.php on line 10

Fatal error: Call to a member function query() on boolean in /home/my.tailieutracnghiem.net/public_html/functioncheck.php on line 28