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<?php
$server = 'localhost';
$username = 'giang2424_demo';
$password = '05012011';
$database = "giang2424_quanlythuchi";
$db_qltc = new mysqli($server, $username, $password, $database);//Thay tên $db_qltc
$db_qltc->set_charset('utf8');

if ($db_qltc->connect_error) {
    echo "<br>Lỗi kết nối";
} else {
    //cho "Kết nối thành công!";
}


?>