include function being weird?

Posted on 16th Feb 2014 by admin

I have a very simple system to grab an IP outputted by a PHP file.. (for a project I have) but it outputs a 1 at the end!!
<form method="post" action="<?php echo $_SERVER["PHP_SELF"]; ?>">
<font style="color:#333;">IP Address to Analyse:</font> <input type="text" value="<?php echo include('./disp_ip.php'); ?>" size="20" maxlength="20" name="IPaddr"><br />
<input style="color:#333;" type="submit" value="submit" name="submit">

Is the code, note NO 1. Disp_ip.php has this simple code:
<?php echo $_SERVER['REMOTE_ADDR']; ?>

Yet I get this insanely weird result?
<input type="text" name="IPaddr" maxlength="20" size="20" value="64.180.2.2341"/>

Where on earth is this 1 coming from? it appears EVERY time I echo disp_ip.php

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