Make a php file to be accessed only by a certain php file on the same domain
<p>I have two php files on a webdomain.</p>

<ul>
<li>The first one contains an iframe with the src="phpfile2.php";</li>
<li>In the second php I have the url of the iframe and other things.</li>
</ul>

<p>I want to secure the second php file so users can't see it because they can get the url of the iframe. </p>

<p>The idea is that I want the secondphp to be accessed only from the first php file.</p>
