Last modified date from remote file?

[Anon]

Hi,

I have a question is there a way in php to check the last
modified date from a remote file, not a local file on the server.

For example: http://www.maraex.com/index2.php3

This is how the function looks like, but when i call this function, this function returns only a date when you give a url without the filename.

For example if you give the url (www.maraex.com) the function returns a date, if you set a filename the server won't return anything.

<?
function get_httpfile_date($httpfile)
{
$fp = fsockopen ("$httpfile", 80, $errno, $errstr, 30);
@fputs ($fp, "GET / HTTP/1.0\r\n\r\n");
for ($count=0; $count<8; $count++)
{
@$string = fgets ($fp,128);
$header = "$header|$string";
}
$header_array = split("Last-Modified:",$header);
$header_array = split("|",$header_array[1]);
$datum = $header_array[0];
@fclose ($fp);
return($datum);
}

$datum = get_httpfile_date("http://www.maraex.com/index2.php3");
echo $datum;

?>

Can anybody help me with this code so it worked with a remote filename.

Thanks for your time.

[biggus]

I used this to download categories from Amazon. If our site hadn't downloaded them within the previous 4 hours, we downloaded them again.

$fp = @fopen("../Forms/Attachments/AmazonCategories.txt","r");

if ($fp) {
$strTimeStamp = fgets($fp, 255); //get the timestamp
fclose($fp);

$avarOrig = getdate($strTimeStamp);
$avarCur = getdate(time());
if ($avarOrig["mday"] == $avarCur["mday"] && ($avarCur["hours"] - $avarOrig["hours"]) < 4) {
	//list already downloaded within 4 hours so don't re-download.
	$download = 0;
} else {
	$download = 1;
}

}

Hope that helps.