PHP registration not inserting new user into table - php

Question

I'm following a tutorial and I've run into an issue where I can complete my registration form but my info isn't saved into the database table. All my code is the same as the tutorial. Am I missing something?
Obviously it has to do with my $insert variable, but I can't figure out what it is.
if(isset($_POST['register'])) {
$user_name = mysqli_real_escape_string($con, $_POST['user_name']);
$user_pass = mysqli_real_escape_string($con, $_POST['user_pass']);
$user_email = mysqli_real_escape_string($con, $_POST['user_email']);
$user_country = mysqli_real_escape_string($con, $_POST['user_country']);
$user_number = mysqli_real_escape_string($con, $_POST['user_number']);
$user_address = mysqli_real_escape_string($con, $_POST['user_address']);
$user_gender = mysqli_real_escape_string($con, $_POST['user_gender']);
$user_b_day = mysqli_real_escape_string($con, $_POST['b_day']);
$user_image = $_FILES['user_image']['name'];
$user_tmp = $_FILES['user_image']['tmp_name'];
if($user_address=='' OR $user_country=="" OR $user_image=="" OR $user_gender=='') {
echo "<script>alert('Please fill all the fields.')</script>";
exit();
}
if(!filter_var($user_email, FILTER_VALIDATE_EMAIL)) {
echo "<script>alert('Your email is not valid.')</script>";
exit();
}
$sel_email = "SELECT * FROM register_user WHERE user_email='" . $user_email . "';";
$run_email = mysqli_query($con, $sel_email);
$check_email = mysqli_num_rows($run_email);
if($check_email==1) {
echo "<script>alert('This email is already registered. Please choose another.')</script>";
exit();
}
else {
$_SESSION['user_email'] = $user_email;
move_uploaded_file($user_tmp, "images/$user_image");
$insert = "INSERT INTO register_user (user_name,
user_pass,
user_email,
user_country,
user_number,
user_address,
user_gender,
user_b_day,
user_image,
register_date)
VALUES ('$user_name',
'$user_pass',
'$user_email',
'$user_country',
'$user_number',
'$user_address',
'$user_gender',
'$user_b_day',
'$user_image',
NOW())";
mysqli_query($con, $insert);
echo "<script>alert('Registration successful.')</script>";
echo "<script>window.open('home.php', '_self' )</script>";
}
}

Answer 1

If you have no error message, try this:
$insert = "INSERT INTO register_user (user_name,
user_pass,
user_email,
user_country,
user_number,
user_address,
user_gender,
user_b_day,
user_image,
register_date)
VALUES ('".$user_name."',
'".$user_pass."',
'".$user_email."',
'".$user_country."',
'".$user_number."',
'".$user_address."',
'".$user_gender."',
'".$user_b_day."',
'".$user_image."',
NOW())";