Simple Method

simply create a file on your website and run this, your IP will be displayed.

<? 
echo $_SERVER["REMOTE_ADDR"];
?>

also

<?php 
$ip = getenv("REMOTE_ADDR") ; 
echo "Your IP is " . $ip; 
?>

Displaying IP in a Graphic Mode

Show IP Display visitor's IP Address in an image with this simple php code.
Your IP Address: 40.206.137.115
Create a new page, copy the text below and save it as image.php (or whatever you wish)

<?php
$img_number = imagecreate(275,25);
$backcolor = imagecolorallocate($img_number,102,102,153);
$textcolor = imagecolorallocate($img_number,255,255,255);

imagefill($img_number,0,0,$backcolor);
$number = " Your IP is $_SERVER[REMOTE_ADDR]";

Imagestring($img_number,10,5,5,$number,$textcolor);

header("Content-type: image/jpeg");
imagejpeg($img_number);
?>

All you'll need to display on other pages is the code below.

<img src="http://mysite.com/image.php" border="1">

Links

• PHP - How to display IP address of a visitor? - some of the code was taken from here