PHP不会重定向

Question

所以我不能解决PHP导致这个问题的最新错误。正如你从代码中看到的那样，我使用if语句来回显。如果细节与查询相同，那么它将回显Test2。但为什么不重定向？我无法弄清楚什么是错的。

<?php 
include "../inc/db.php"; 
include "../inc/functions.php"; 

$tip = ""; 

if(isset($_POST["submit"])) { 
    $username = $_POST["username"]; 
    $password = $_POST["password"]; 

    $username = mysqli_real_escape_string($connection, $username); 
    $password = mysqli_real_escape_string($connection, $password); 

    $query = "SELECT * FROM users WHERE username = '{$username}' "; 
    $select_user_query = mysqli_query($connection, $query); 

    if(!$select_user_query) { 
     die("Query failed. Reason: " . mysqli_error($connection)); 
    } 

    while($row = mysqli_fetch_array($select_user_query)) { 
     $db_user_id = $row['id']; 
     $db_username = $row['username']; 
     $db_password = $row['password']; 
    } 

    if($username !== $db_username && $password !== $db_password) { 
     header("Location index.php"); 
     $tip = "Incorrect details!"; 
     echo "Test1"; 
    } elseif ($username == $db_username && $password == $db_password) { 
     header("Location "); 
     echo "Test2"; 
    } else { 
     header("Location index.php"); 
     echo "Test3"; 
    } 
} 

?> 

结果提交正确的细节：

，并证明dashboard.php确实存在

，如果我进入这并不在MySQL数据库中存在，那么我得到这样的：

但我在while循环中定义了变量

Answer 1

header("Location dashboard.php"); 

分号失踪

header("Location: dashboard.php"); 

我傻......