The current content of this google docs page is:

However, when reading this page with the following PHP fopen() script, I get an older, cached version:

I've tried two solutions proposed in this question (a random attribute and using POST) and I also tried clearstatcache() but I always get the cached version of the web page.

What do I have to change in the following script so that fopen() returns the current version of the web page?

<?php
$url = 'http://docs.google.com/View?id=dc7gj86r_32g68627ff&amp;rand=' . getRandomDigits(10);

echo $url . '<hr/>';
echo loadFile($url);

function loadFile($sFilename) {
    clearstatcache();
    if (floatval(phpversion()) >= 4.3) {
        $sData = file_get_contents($sFilename);
    } else {
        if (!file_exists($sFilename)) return -3;

        $opts = array('http' =>
          array(
            'method'  => 'POST',
            'content'=>''
          )
        );
        $context  = stream_context_create($opts);                

        $rHandle = fopen($sFilename, 'r');
        if (!$rHandle) return -2;

        $sData = '';
        while(!feof($rHandle))
            $sData .= fread($rHandle, filesize($sFilename));
        fclose($rHandle);
    }
    return $sData;
}

function getRandomDigits($numberOfDigits) {
 $r = "";
 for($i=1; $i<=$numberOfDigits; $i++) {
  $nr=rand(0,9);
  $r .=  $nr;
 }
 return $r;
}

?>