Error while outputting sessions in other page - php

Question

I created a login page in PHP with session. everything is going well. but when i try to output the session in other page. it giving me NOTICE
Notice: Undefined variable: email in C:\xampp\htdocs\COIN Website\test5.php on line 81
Notice: Undefined variable: email in C:\xampp\htdocs\COIN Website\test5.php on line 82
Notice: Undefined variable: email in C:\xampp\htdocs\COIN Website\test5.php on line 84
I don't know whats wrong. Actually, I am new to PHP.
here is the login page
<?php
session_start();
if (isset($_POST['submit'])) {
$servername = "localhost";
$username = "root";
$password = "";
$db_name = "coins";
$con = mysqli_connect("$servername", "$username", "$password","$db_name");
$email = mysqli_real_escape_string($con, $_POST['email']);
$eth = mysqli_real_escape_string($con, $_POST['eth']);
if (empty($email) || empty($eth)) {
header("Location: home.php?Login=Empty_fields");
exit();
} else{
$sql = "SELECT * FROM users WHERE email='$email' ";
$result = mysqli_query($con, $sql);
$resultCheck = mysqli_num_rows($result);
if ($resultCheck < 1) {
header("Location: home.php?Login=user_does_not_exist");
exit();
}
else {
$check = mysqli_query($con, "SELECT email FROM users WHERE eth='$eth'");
if (mysqli_num_rows($check) >= 1) {
$_SESSION['email'] = $row['email'];
$_SESSION['eth'] = $row['eth'];
header("Location: pow.php?Login=Success");
} else {
header("Location: home.php?Login=invaild_email_or_eth address");
}
}
}
}else {
header("Location: home.php?Login=Error");
exit();
}
?>
and the other page code
if (isset($_POST['submit'])) {
$servername = "localhost";
$user = "root";
$password = "";
$dbname = "coins";
// Create connection
$conn = new mysqli($servername, $user, $password, $dbname);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
$_SESSION['email'] = $email;
echo $email;
$sql = "INSERT INTO profile (email, action_points)
VALUES ('$email' , '0.003')";
if ($conn->query($sql) === TRUE) {
echo "success";
} else {
echo "Error: " . $sql . "<br>" . $conn->error;
}
$conn->close();
}
?>

Answer 1

You can try like this. you are doing wrong with get session variable value.
<?php session_start();
// check session
if(isset($_SESSION['email']))
{
$email = $_SESSION['email'];
// Now you can do your stuff
}
else
{
echo "session not set for email";
die;
}