file handling

remote last modified

| see demonstration of remote last modified

functions to retrieve the last modified date from files on remote servers.
very practical to check if a new version of a file is ready to download on another server.

function get_raw_header( ) [ line 2 ]

function get_header_array( ) [ line 22 ]

full source of remote last modified [ line 1 - 43 ] | download remote last modified

1	<?php
2	function get_raw_header($host,$doc)
3	{
4	$httpheader = '';
5	$fp = fsockopen ($host, 80, $errno, $errstr, 30);
6	if (!$fp)
7	{
8	echo $errstr.' ('.$errno.')';
9	}else{
10	fputs($fp, 'GET '.$doc.' HTTP/1.0'."rn".'Host: '.$host."rnrn");
11	while(!feof($fp))
12	{
13	$httpresult = fgets ($fp,1024);
14	$httpheader = $httpheader.$httpresult;
15	if (ereg("^rn",$httpresult))
16	break;
17	}
18	fclose ($fp);
19	}
20	return $httpheader;
21	}
22	function get_header_array($url)
23	{
24	$url = ereg_replace('http://','',$url);
25	$endHostPos = strpos($url,'/');
26	if(!$endHostPos) $endHostPos = strlen($url);
27	$host = substr($url,0,$endHostPos);
28	$doc = substr($url,$endHostPos,strlen($url)-$endHostPos);
29	if($doc == '') $doc = '/';
30	$raw = get_raw_header($host,$doc);
31	$tmpArray = explode("n",$raw);
32	for ($i=0;$i<sizeof($tmpArray); $i++)
33	{
34	@list($name, $value) = explode(':', $tmpArray[$i], 2);
35	$array[trim($name)]=trim($value);
36	}
37	return $array;
38	}
39	// use like
40	$remote_file = 'http://fundisom.com/MakeNewFolderNamed.dmg'; // should be a static file like a .zip archive for example
41	$array = get_header_array($remote_file);
42	echo $remote_file.' was last modified on '.date('j F Y',strtotime($array['Last-Modified']));
43	?>

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