Request How get ip using the contact form?

Hello guys!!
I have a custom contact form page and I want to display the ip of the person attached with email!
anybody can help me edit the php code, thanks!




My code!

PHP Code:

<?php
define('IN_MYBB', 1);
require "./global.php";
define('THIS_SCRIPT', 'contact.php');

global $headerinclude, $header, $theme, $footer, $templates, $lang;

$lang->load('member');
$lang->load('messages');
$lang->load('datahandler_user');

add_breadcrumb("Contact US", "contact.php");

$subject = htmlspecialchars_uni(trim($mybb->input['subject']));
$message = htmlspecialchars_uni(trim($mybb->input['message']));

if(!$mybb->user['uid'])
{
    $name = htmlspecialchars_uni(trim($mybb->input['name']));
    $email = htmlspecialchars_uni(trim($mybb->input['email']));

    $usertemplate = '<tr>
<td width="40%" class="trow1"><strong>{$lang->full_name}</strong></td>
<td width="60%" class="trow1"><input type="text" class="textbox" size="50" name="name" value="{$name}" /></td>
</tr>
<tr>
<td width="40%" class="trow2"><strong>{$lang->email_address}</strong></td>
<td width="60%" class="trow2"><input type="text" class="textbox" size="50" name="email" value="{$email}" /></td>
</tr>';

    $usertemplate = str_replace("\'", "'", addslashes($usertemplate));

    eval("\$usertemplate = \"" . $usertemplate . "\";");
}
else
{
    $name = $mybb->user['username'];
    $email = $mybb->user['email'];

    eval("\$usertemplate = \"" . $templates->get('changeuserbox') . "\";");
}

if($mybb->input['action'] == 'do_email' && $mybb->request_method == 'post')
{
    verify_post_check($mybb->input['my_post_key']);

    if(empty($name))
    {
        $errors[] = $lang->userdata_missing_username;
    }
    elseif(strpos($name, '<') !== false || strpos($name, '>') !== false || strpos($name, '&') !== false || my_strpos($name, '\\') !== false || strpos($name, ';') !== false || strpos($name, ',') !== false)
    {
        $errors[] = $lang->userdata_bad_characters_username;
    }

    if(empty($email))
    {
        $errors[] = $lang->userdata_missing_email;
    }
    elseif(!validate_email_format($email))
    {
        $errors[] = $lang->userdata_invalid_email_format;
    }

    if(empty($subject))
    {
        $errors[] = $lang->error_no_email_subject;
    }

    if(empty($message))
    {
        $errors[] = $lang->error_no_email_message;
    }

    if($mybb->settings['captchaimage'] == 2 && function_exists("imagepng") && !$mybb->user['uid'])
    {
        require_once MYBB_ROOT.'inc/class_captcha.php';
        $post_captcha = new captcha;

        if($post_captcha->validate_captcha() == false)
        {
            // CAPTCHA validation failed
            foreach($post_captcha->get_errors() as $error)
            {
                $errors[] = $error;
            }
        }
        else
        {
            $hide_captcha = true;
        }
    }

    if(count($errors) == 0)
    {
        if($mybb->settings['mail_handler'] == 'smtp')
        {
            $from = $email;
        }
        else
        {
            $from = $name . ' <' . $email . '>';
        }
        my_mail($mybb->settings['adminemail'], '[' . $mybb->settings['bbname'] . ' ' . $pages['name'] . '] ' . $subject, $message, $from, '', '', false, 'text', '', $email);

        redirect($mybb->settings['bburl'], $lang->redirect_emailsent);
    }
    else
    {
        $errors = inline_error($errors);
    }
}

if($mybb->settings['captchaimage'] == 2 && function_exists('imagepng') && !$mybb->user['uid'])
    {
        $correct = false;
        require_once MYBB_ROOT.'inc/class_captcha.php';
        $post_captcha = new captcha(false, "post_captcha");

        if($mybb->input['previewpost'] || $hide_captcha == true && $post_captcha->type == 1)
        {
            // If previewing a post - check their current captcha input - if correct, hide the captcha input area
            // ... but only if it's a default one, reCAPTCHAs must be filled in every time due to draconian limits
            if($post_captcha->validate_captcha() == true)
            {
                $correct = true;

                // Generate a hidden list of items for our captcha
                $captcha = $post_captcha->build_hidden_captcha();
            }
        }

        if(!$correct)
        {
            if($post_captcha->type == 1)
            {
                $post_captcha->build_captcha();
            }
            else if($post_captcha->type == 2)
            {
                $post_captcha->build_recaptcha();
            }

            if($post_captcha->html)
            {
                $captcha = $post_captcha->html;
            }
        }
    }

$template = '<html>
<head>
<title>' . $pages['name'] . '</title>
{$headerinclude}
</head>
<body>
{$header}
{$errors}
<form action="' . $_SERVER['REQUEST_URI'] . '" method="post">
<input type="hidden" name="my_post_key" value="{$mybb->post_code}" />
<table border="0" cellspacing="' . $theme['borderwidth'] . '" cellpadding="' . $theme['tablespace'] . '" class="tborder">
<thead>
<tr>
<td colspan="2" class="thead">
<strong>' . $pages['name'] . '</strong>
</td>
</tr>
</thead>
<tbody>
{$usertemplate}
<tr>
<td width="40%" class="trow1"><strong>{$lang->email_subject}</strong></td>
<td width="60%" class="trow1"><input type="text" class="textbox" size="50" name="subject" value="{$subject}" /></td>
</tr>
<tr>
<td valign="top" width="40%" class="trow2"><strong>{$lang->email_message}</strong></td>
<td width="60%" class="trow2"><textarea cols="50" rows="10" name="message">{$message}</textarea></td>
</tr>
{$captcha}
</tbody>
</table>
<br />
<input type="hidden" name="action" value="do_email" />
<div align="center"><input type="submit" class="button" value="{$lang->send_email}" /></div>
</form>
{$footer}
</body>
</html>';

$template = str_replace("\'", "'", addslashes($template));

add_breadcrumb($pages['name']);

eval("\$page = \"" . $template . "\";");

output_page($page);

?>

You want to get the IP address of a stranger? To be honest, I am not really sure how to do that, and even if I did, I think it is a bit intrusive.

I understand you probably want it for banning purposes if spammed, but then you should be using a better captcha if you are being hit by bots/spammers.

Fixed on mybb