function _get_headers( $arr )
{
if( substr($arr['URL'],0,7) != 'http://' )
{
return FALSE;
}
$arr['URL'] = explode('/',$arr['URL']);
$HOST = $arr['URL'][2];
$FILE = '';
if( count($arr['URL']) > 3 )
{
foreach( array_splice($arr['URL'],3) as $v )
{
$FILE .= '/'.$v;
}
}
else
{
$FILE = $arr['URL'][2];
}
$socket = socket_create(AF_INET, SOCK_STREAM,
SOL_TCP);
if ($socket < 0)
{
return FALSE;
}
if ( socket_connect($socket, gethostbyname($HOST),
getservbyname('www', 'tcp')) < 0)
{
return FALSE;
}
$in = "HEAD ".$FILE." HTTP/1.1\r\n";
$in .= "Host: ".$HOST."\r\n";
$in .= "Connection: Close\r\n\r\n";
socket_write($socket, $in, strlen($in));
$result = trim(socket_read($socket, 1024));
$result = explode("\n",$result);
socket_close($socket);
if( !ereg("HTTP/1.1 200 OK",$result[0]) )
{
return FALSE;
}
if( $arr['check'] )
{
return TRUE;
}
if( $arr['mode'] )
{
foreach( $result as $val )
{
$t = explode(":",$val,2);
if( count($t) == 1 )
{
$header[0] = trim($t[0]);
}
else
{
$header[$t[0]] = trim($t[1]);
}
}
}
else
{
$header = $result;
}
return $header;
}
Exemple:
Check file exist?
if( _get_headers( array
('http://www.example.com/testfile.txt','check' => 1) ) )
{
print "File exist";
}
else
{
Print "File not exist!";
}
Get filesize:
$header = _get_headers( array('URL'
=> 'http://www.example.com/testfile.txt', 'mode' => 1) );
if( $header )
{
Print "Filesize is: ".$header['Content-length'];
}
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