PHP/mysqli的錯誤

Question

include($_SERVER['DOCUMENT_ROOT'].'/include/header.php'); 
$conn = new mysqli("localhost", "hidden", "hidden", "hidden"); 
$user = $conn->query("SELECT username FROM users WHERE username='$username'"); 

我的問題：我想以後引用它，並正在此錯誤：

<h4> Welcome, <?php echo $user['username'];?> </h4> 

Error: Fatal error: Cannot use object of type mysqli_result as array in /home/u2029109/public_html/vobern/home/index.php on line 19

Answer 1

如果你想獲取的結果，並作爲數組使用你可以使用mysql_fetch_array。

$result = $mysqli->query("SELECT username FROM users WHERE username='$username'"); 
$user = $result->fetch_array(MYSQLI_ASSOC); 

，它可以讓你再

echo $user['username'];