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Question

I’m learning PHP on YouTube and I met an issue I don’t know what happened.
I’m creating a signup page and want to show the error message but the error session seems to be recorded. It stops in the signUp.inc.php as below.

signUp.inc.php

<?php

declare(strict_types=1);

if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $userName = $_POST["userName"];
    $pwd = $_POST["pwd"];
    $email = $_POST["email"];

    try {
        require_once "dbh.inc.php";
        require_once "signUp_model.inc.php";
        require_once "signUp_contr.inc.php";

        // ERROR HANDLERS
        $errors = [];

        if (is_input_empty($userName, $pwd, $email)) {
            $errors["empty_input"] = "Fill in all fields";
        }
        if (is_email_invaild($email)) {
            $errors["invalid_email"] = "Invalid email used";
        }
        if (is_username_taken($pdo, $userName)) {
            $errors["username_taken"] = "Username already taken";
        }
        if (is_email_taken($pdo, $email)) {
            $errors["email_used"] = "Email already registered";
        }

        require_once "config_session.inc.php";

        if ($errors) {
            $_SESSION["errors_signUp"] = $errors;
            header("Location: ../index.php");
            exit();
        }
        
    } catch (PDOException $e) {
        exit("Query failed: " . $e->getMessage());
    }
}
else {
    header("Location: ../index.php");
    exit("Query failed: " . $e->getMessage());
}

I think the config_session.inc.php and the signUp_view.inc.php are working but they can’t get the message in the $_SESSION[“errors_signUp”] from signUp.inc.php so they show NULL in the index.php.

I only found this reason but couldn’t further find out why it happened and the solution. Could someone kindly tell me how to fix it, please?

config_session.inc.php

<?php

ini_set('session.use_only_cookie', 1); // https://www.php.net/manual/en/session.configuration.php
ini_set('session.use_strict_mode', 1); 

session_set_cookie_params([
    'lifetime' => 3600,
    'domain' => 'localhost',
    'path' => '/',
    'secure' => true,
    'httponly' => true
]); 

session_start();

if(!isset($_SESSION['last_regeneration'])) {
    regenerate_session_id();
} else {
    $interval = 60 * 60;
    if(time() - $_SESSION['last_regeneration'] >= $interval) {
        regenerate_session_id();
    }
}

function regenerate_session_id() {
    session_regenerate_id(); //not sure it should be true
    $_SESSION['last_regeneration'] = time();
}

signUp.inc.php

<?php

declare(strict_types=1);

function check_signUp_errors() 
{
    if(isset($_SESSION["errors_signUp"])){
        $errors = $_SESSION["errors_signUp"];

        echo "<br>";

        foreach ($errors as $error) {
            echo '<p class="form-error">' . $error . '</p>';
        }

        unset($_SESSION["errors_signUp"]);
    } 
}

index.php

<?php
require_once './includes/signUp_view.inc.php';
require_once './includes/config_session.inc.php';
// require_once './includes/signUp.inc.php';
?>

<!DOCTYPE html>
<html lang="zh-Hant">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes, minimum-scale=1.0, maximum-scale=3.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<link rel='stylesheet' href='./style/main.css' />
<title>Document</title>
</head>
<body>
   <h3>Login</h3>

   <form action="includes/login.inc.php" method="post">
      <input type="text" name="userName" placeholder="Username">
      <input type="password" name="pwd" placeholder="Password">
      <button>Login</button>
   </form>

   <h3>Signup</h3>

   <form action="includes/signUp.inc.php" method="post">
      <input type="text" name="userName" placeholder="Username">
      <input type="password" name="pwd" placeholder="Password">
      <input type="text" name="email" placeholder="E-Mail">
      <button>Signup</button>
   </form>

   

   <?php
   check_signUp_errors();
   ?>


</body>
</html>

Many thanks <(_ _)>

I removed header("Location: ../index.php") in the signUp.inc.php and echo var_dump($_SESSION["errors_signUp"]); then I can see the messages in the $_SESSION["errors_signUp"].
However I used <?php echo var_dump($_SESSION) ?> in the index.php, which shows NULL.

I tried to use session_start(); to replace require_once "config_session.inc.php"; in the signUp.php but it didn’t work.

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Danh mục

php recording the error session but it doesn’t work