Question

所以我正在构建一个用户注册的网站，当他登录时，他/她可以做一些事情，例如未标记的引用（添加回），用户未注册的标记（从公共视图中删除）。但是，我在弄清楚为什么我的控制器文件上的标题（'location：index.php'）不会将页面重定向到index.php页面时遇到问题。我已经尝试注释掉所有echo实例（“在我的控制器中的一些东西“”，看看它是否为什么不起作用，但它也没有用。我没有留下为什么标题（'location：index.php'）不起作用的线索。

这是我的控制器文件，我在成功注册后重定向用户：

<?php 

session_start();
include "DataBaseAdaptor.php";


function GetQuotes($theDBA) {
    $array = $theDBA->getQuotesAsArray();
    $quotes = [];
    //$quotes[] = [];

    $i = 0;
    $j = 0;
    $id = "";
    if(count($array)>0){
    foreach($array as $item) {
        $quotes[$i][$j] = $item['quote'];
        $quotes[$i][$j+1] = $item['author'];
        $quotes[$i][$j+2] = $item['rating'];
        $quotes[$i][$j+3] = $item['id'];
        $i++; 
    }}
    return $quotes;
}
$quotes = GetQuotes($theDBA);                         //This to display the quotes initially

// This part is for registering the user
if(isset($_GET['user']) && isset($_GET['pass'])) {
    $username = $_GET['user'];
    $password = $_GET['pass'];
    $hashed_password = password_hash($password, PASSWORD_DEFAULT);  

    // If false, then username already exists
    if (!$theDBA->register($username,  $hashed_password )) {
       //echo("Username already exists");  
    }
    else {          //The control does come to this block and the else is evaluated to true. However it won't redirect
        $_SESSION['user'] = $username;
        header('Location: index.php');

    }
}
// Register ends here----------------------------------------------------------------------------------



//This part is for adding quote
if(isset($_GET['quote']) && isset($_GET['author'])) {
    $quote = $_GET['quote'];
    $quote = str_replace("'", "", $quote);

    $author = $_GET['author'];
    $theDBA->addQuote($quote, $author);
    $quotes = GetQuotes($theDBA);
    header( 'Location: index.php' );
}


// This is for logging in
$quotes = GetQuotes($theDBA);
$user = "";
$pass = "";
if(isset($_GET['p']) && isset($_GET['q'])) {
     $user = isset($_GET['p']);
     $pass = isset($_GET['q']);

}
for ($i = 0; $i < count($quotes); $i++){
    if($user === $quotes[$i][0]) {
        $_SESSION['user'] = 'Rick';
        header('Location: index.php');
    }
}

echo json_encode($quotes);
?>

我不知道你是否需要我的model.php（在我的情况下是DataBaseAdaptor.php），但这里是。与数据库相关的所有内容都与所有sql操作一样正常。但如果你需要它，请发现它。如果您发现model.php没有必要，请随时向我的帖子发送编辑建议（但请，只有在您确定没有必要时才这样做）。谢谢！

这是model.php

<?php

//
// Author: Rick Mercer.   File name: model.php
//

class DatabaseAdaptor {
// The instance variable used in every one of the functions in class 
DatbaseAdaptor
private $DB;

// Make a connection to an existing data based named 'first' that has table 
customer
public function __construct() {
$db = 'mysql:dbname=quotes; charset=utf8; host=127.0.0.1';
$user = 'root';
$password = ''; 

try {
  $this->DB = new PDO ( $db, $user, $password );
  $this->DB->setAttribute ( PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION );
} catch ( PDOException $e ) {
echo ('Error establishing Connection');
  exit ();
}
}

// Return all records as an associative array.
public function getQuotesAsArray() {
$query = "SELECT * FROM quotations WHERE flagged = 0 ORDER BY rating DESC";

$stmt = $this->DB->prepare($query);
$stmt->execute ();
// fetchall returns all records in the set as an array
return $stmt->fetchAll ( PDO::FETCH_ASSOC );
}

   // Checks if a user exists, if not register the new user
  public function register($username, $password) {
  $query = "SELECT * from users";
  $stmt = $this->DB->prepare($query);
  $stmt->execute ();

// fetchall returns all records in the set as an array
$array = $stmt->fetchAll ( PDO::FETCH_ASSOC );

// If there are no registered users, just register the new user
if(count($array) == 0) {
    $query = "INSERT INTO users (username, hash) VALUES ('$username', 
'$password')";
    $stmt = $this->DB->prepare($query);
    $stmt->execute ();
    return true;
 // header( 'Location: index.php' );
}

foreach($array as $item) {
    if($username == $item['username']) {
        return false;
    }
}
    $query = "INSERT INTO users (username, hash) VALUES ('$username', '$password')";
    $stmt = $this->DB->prepare($query);
    $stmt->execute ();
    return true;
   //header( 'Location: index.php' );
 }


 public function addQuote($quote, $author) {
 $query = "INSERT INTO quotations (added, quote, author, rating, flagged) 
 VALUES(now(), '$quote', '$author', 0, 0)";
 $stmt = $this->DB->prepare($query);
 $stmt->execute ();
 }


 } // End class DatabaseAdaptor

$theDBA = new DatabaseAdaptor();
?>




Any help is appreciated. Thanks!

Answer 1

将header();替换为echo 'redirecting...';，看看您的代码是否达到标题部分或不是。
如果你能看到＆＃34;重定向......＆＃34;然后就会阻止header运行。例如，header之前可能会出现警告或其他内容。在这种情况下，尝试解决该警告或（不是一个好主意）尝试ob_start和ob_end_clean以防止刷新任何输出。

Answer 2

我认为代码中存在问题：

if(isset($_GET['p']) && isset($_GET['q'])) {
     $user = isset($_GET['p']);
     $pass = isset($_GET['q']);

}

$ user和$ pass将始终获得值0或1，因此代码的下一部分

for ($i = 0; $i < count($quotes); $i++){
    if($user === $quotes[$i][0]) {
        $_SESSION['user'] = 'Rick';
        header('Location: index.php');
    }
}

不太可能评估为true（除非$ quotes数组的值为0或1），并且标题重定向不会触发。

在我看来，用户和密码应设置如下：

if(isset($_GET['p']) && isset($_GET['q'])) {
     $user =$_GET['p'];
     $pass = $_GET['q'];
}

希望这是问题。

无法想出为什么标题位置不适用于这种情况（php）

2 个答案: