CODEWITHSUNDEEP
phpmysqlsession
user6091946
user6091946

Reputation:

PHP: session variable lost on clicking form submit button?

When I click form submit button session variable lost and it shows message that session is not set. I have another confusion that it has only problem when I set session of login variable or those variables which are set in other page of my site.
When I set some random session variable on the top of this page it works fine and session variable does not lose anymore. I have also checked some other related links in stack overflow but nothing found solution

Here is the code of addProduct.php page

        <?php

    //var_dump($_SESSION);
    if(!(isset($_SESSION['login']))) {

        echo "session is not set";
    }
    else {
        //header("location:index.php");
        echo "session is set";
        //$user_email=$_SESSION['user_email'];



    ?>
        <html>
        <body>

        <form action="addproduct.php" method="post">

            <input type="text" name="name" value="">
            <input type="submit" name="submit" value="submit">

        </form>


        </body>
        </html>
        <?php
        if(isset($_POST['submit']))
        {
            $name = $_POST['name'];
           // $_SESSION['user_email']=$_SESSION['user_email'];
            echo $name;
        }
        ?>
    <?php }
    ?>

Code of index.php (header file) page from where I get into this page

<?php
    session_start();
    include("db.php");
    ?>

    <html xmlns="http://www.w3.org/1999/html" xmlns="http://www.w3.org/1999/html">
    <head>
        <title>Home</title>
    </head>
    <body>

    <a href="index.php">Home</a></br></br>

    <?php if(isset($_SESSION['login']) ) {
    if($_SESSION['user_status']=="admin")
    {

    ?>
    <a href="index.php?page=addproduct">Post an Ad</a></br></br>
    <?php }
    }

    ?>

    <?php if(isset($_SESSION['user_fname']) && isset($_SESSION['user_lname']) && isset($_SESSION['user_email']))
    {
    ?>
    <a href="index.php"><?php echo $_SESSION['user_fname'] . " " . $_SESSION['user_lname'] . " " . $_SESSION['user_status']; ?></a></br></br>
    <?php
    }
    else
    {
    ?>
    <a href="login.php">Login</a></br></br>
    <a href="UserSignup.php">SignIn</a></br></br>
    <?php }
    if(isset($_SESSION['user_fname']) && isset($_SESSION['user_lname']) && isset($_SESSION['user_email']))
    {
    ?>
    <a href="logout.php">Logout</a></br></br>
    <?php }
    ?>
    <div id="content">
        <?php


        if(isset($_GET['page']))
        {
            $p=$_GET['page'];

            $page =  $p . ".php";
            //echo $page;
            if(file_exists($page))
            {include($page);
            }
            elseif($page=="")
                echo "this is home page";
            else
            {echo "Not found";}
        }

        else
        {
            include ("showAds.php");
        }
        ?>

    </div>










    </body>
    </html>

Code of login.php

    <?php
    session_start();
    if(isset($_SESSION['user_fname']) && isset($_SESSION['user_lname']) && isset($_SESSION['user_email'])) {
        header("location:index.php");
        exit();
    }
        else
        {

    ?>

    <html>

    <head><title>Login</title></head>
    <body>
    <form action="login.php" method="post">
        <input type="email" name="user_email" placeholder="USER EMAIL" REQUIRED>
        <input type="password" name="user_password" placeholder="USER PASSWORD" REQUIRED>

        <input type="submit" name="Go" value="SUBMIT!" placeholder="USER NAME" REQUIRED>
        </br></br><a href="UserSignup.php">SignIn with new account</a></br>



    </form>

    <?php
    include("db.php");
    /*if(isset($_POST['Go'])) {    SIGNUP
        $user_name = $_POST['user_name'];
        $user_password = $_POST['user_password'];
        $user_email = $_POST['user_email'];
        echo $user_name . "<br>";
        echo $user_email . "<br>";
        echo $user_password . "<br>";
        $sql = "INSERT INTO user(user_name,user_email,user_password) VALUE ('$user_name','$user_email','$user_password')";
        if(mysqli_query($conn,$sql))
        {
            echo "stored";
            header("location:http://localhost/window.php");
        }
        else
        {
          die(mysqli_error($sql));
        }
    }*/
    if(isset($_POST['Go']))
    {
        $user_email = $_POST['user_email'];//real_escape_string
        $user_password = $_POST['user_password'];
        $login_query="SELECT * FROM user WHERE user_email='$user_email' AND user_password='$user_password'";
        $run=mysqli_query($conn,$login_query);
        if(mysqli_num_rows($run)>0)

        {
            $res = mysqli_query($conn, "SELECT * FROM ecommerce.user WHERE user_email='$user_email'");

            while ($record = mysqli_fetch_array($res)) {

                $_SESSION['user_fname']=$record['user_fname'];
                $_SESSION['user_lname'] = $record['user_lname'];
                $_SESSION['user_status'] = $record['user_status'];
                $_SESSION['user_id'] = $record['user_id'];
                $_SESSION['user_password'] = $record['user_password'];

            }


            $_SESSION['user_email']=$user_email;
            $_SESSION['login']="true";

           //echo $_SESSION['user_fname'] . $_SESSION['user_lname'];


            header("location:index.php");
            exit();
        }
        else
            echo "<p style='color: red; margin-top: -28px;'>User name or password incorrect</p>";
    }




    ?>

    </body>
    </html>
    <?php }?>

Upvotes: 1

Views: 1930

Answers (2)

Funk Forty Niner
Funk Forty Niner

Reputation: 74217

This error you showed in your other question which was marked as an exact duplicate of this one:

Notice: A session had already been started - ignoring session_start() in C:\xampp\htdocs\ecommerce\showAds.php on line 2

Your showAds.php page which you didn't include, (most likely) contains session_start(); and it should be removed from inside that file.

index.php has an include and session_start();

else
    {
        include ("showAds.php");
    }

So one of your if statements failed.

That is why you're getting that error.

All pages using sessions require that session_start(); be included and should be the first line of your script, which isn't shown in addProduct.php.

Also make sure you're not outputting before header. If you are, consult the following on how to fix it:

Add error reporting to the top of your file(s) which will help find errors.

<?php 
error_reporting(E_ALL);
ini_set('display_errors', 1);

// Then the rest of your code

Sidenote: Displaying errors should only be done in staging, and never production.

Upvotes: 1

Ahmad Essam
Ahmad Essam

Reputation: 1104

You have to add session_start(); in your addProduct.php to be able to access session contents!

Upvotes: 0

Related Questions