试图回应mysql连接与否

Question

第4行出错。为什么？我正在尝试连接到mysql数据库，看看它是否连接。我没有得到任何结果。

jcon.php

 <?php 
    require 'config.php';
    $con=mysqli_connect(HOST,DBUSER,DBPASS,DB);
    if(mysqli_connect_errno($con)){
        echo "Failed to connect to MySQL: " . mysqli_connect_error();
    }
    else{ echo "mysql connected succesfully";}
    ?>

的config.php

<?php
define( "HOST","localhost");
define ("DB","share");
deifne ("DBUSER";"root");
define ("DBPASS"; "" );
?>

Answer 1

deifne ("DBUSER";"root");似乎有问题