PHP: How do I display the contents of a textfile on my page?

I have a .txt file on my web server (locally) and wish to display the contents within a page (stored on the same server) via PHP echo.

The .txt file contains a number that is updated by another script on another page, but for this page I just want to pull the number/txt file contents from the file and echo it (to save the page having to do the calculation involved in getting the number again).

How can I do this?

Here's what I've got so far:

    <?php
    $myFile = "http://renownestates.com/cache/feedSubscribers.txt";
    $fh = fopen($myFile, 'r');
    $theData = fread($fh, 1);
    fclose($fh);
    echo $theData;
    ?>