php not reading file properly

["sean greenslade" <zootboysean@xxxxxxxxx>]

I have this snippet of code that is supposed to read the apache access log
and display it:
<?php
    $myFile = "/var/log/httpd/access_log";
    $fh = fopen($myFile, 'r');
    $theData = fread($fh, filesize($myFile));
    fclose($fh);
    echo
    "This weeks apache log (clears every sunday morning):".
    substr($theData,0,2000);
?>
For some reason, it displays the logs when I run the php file thru terminal:
php -f /web/apache.php

but not when I access it thru the web. when I browse to it, it just displays
the static text ("This weeks apache log (clears every sunday morning):"),
not the log text.

Very confused,
zootboy