Capture ip address of machine of the user - php

Question

<?php
if (isset($_GET['action']) && ($_GET['action'] == 'submit')) {
$name = $_POST['name'];
$message = $_POST['message'];
$email = $_POST['email'];
$ip = $_SERVER["REMOTE_ADDR"];
$messageip = "User IP: $ip\n\n" . $messageip;
$sql = "SELECT * FROM tbl_user WHERE email = '" . $email . "'";
$query = mysql_query($sql);
$count = mysql_num_rows($query);
if ($count >= 1) {
echo "User Already in Exists<br/>";
} else {
$newUser = "INSERT INTO tbl_user(name,message,email,ip_address) values('$name','$message','$email','$messageip')";
$query2 = mysql_query($newUser);
if ($query2) {
echo "You are now registered<br/>";
} else {
echo "Error adding user in database<br/>";
}
}
echo $name . '<br/>';
echo $message . '<br/>';
echo $email . '<br/>';
echo $messageip . '<br/>';
}
?>
I am using this code to capture the ip address but i cannot get the machine ip of the particular user from which i can display the address by dynamically, so can anyone help me out on this topic?

Answer 1

You seem to be concatenating a wrong (empty) var.
Try changing this:
$messageip = "User IP: $ip\n\n" . $messageip;
to this:
$messageip = "User IP: $ip\n\n" . $ip;