PHP Manual: Retrieves header/meta data from streams/file pointers

Description

array stream_get_meta_data ( resource $stream )

Returns information about an existing stream.

Parameters

stream: The stream can be any stream created by fopen, fsockopen and pfsockopen.

Return Values

The result array contains the following items:

timed_out (bool) - TRUE if the stream timed out while waiting for data on the last call to fread or fgets.
blocked (bool) - TRUE if the stream is in blocking IO mode. See stream_set_blocking.
eof (bool) - TRUE if the stream has reached end-of-file. Note that for socket streams this member can be TRUE even when unread_bytes is non-zero. To determine if there is more data to be read, use feof instead of reading this item.
unread_bytes (int) - the number of bytes currently contained in the PHP's own internal buffer.

Note: You shouldn't use this value in a script.
stream_type (string) - a label describing the underlying implementation of the stream.
wrapper_type (string) - a label describing the protocol wrapper implementation layered over the stream. See Supported Protocols and Wrappers for more information about wrappers.
wrapper_data (mixed) - wrapper specific data attached to this stream. See Supported Protocols and Wrappers for more information about wrappers and their wrapper data.
mode (string) - the type of access required for this stream (see Table 1 of the fopen() reference)
seekable (bool) - whether the current stream can be seeked.
uri (string) - the URI/filename associated with this stream.

Changelog

Version	Description
5.0.0	The following entries were added in the returned array: mode, seekable, and uri.
4.3.0	The following entries were added in the returned array: stream_type, wrapper_type, wrapper_data, and filters.
4.3.0	socket_get_status is an alias for this function. Prior to PHP 4.3.0, it was used to retrieve the first four items, for socket based streams only.

Examples

Example #1 stream_get_meta_data example


<?php
$url = 'http://www.example.com/';

if (!$fp = fopen($url, 'r')) {
    trigger_error("Unable to open URL ($url)", E_USER_ERROR);
}

$meta = stream_get_meta_data($fp);

print_r($meta);

fclose($fp);
?>

The above example will output something similar to:

Array
(
    [wrapper_data] => Array
        (
            [0] => HTTP/1.1 200 OK
            [1] => Server: Apache/2.2.3 (Red Hat)
            [2] => Last-Modified: Tue, 15 Nov 2005 13:24:10 GMT
            [3] => ETag: "b300b4-1b6-4059a80bfd280"
            [4] => Accept-Ranges: bytes
            [5] => Content-Type: text/html; charset=UTF-8
            [6] => Set-Cookie: FOO=BAR; expires=Fri, 21-Dec-2012 12:00:00 GMT; path=/; domain=.example.com
            [6] => Connection: close     
            [7] => Date: Fri, 16 Oct 2009 12:00:00 GMT
            [8] => Age: 1164   
            [9] => Content-Length: 438
        )

    [wrapper_type] => http
    [stream_type] => tcp_socket/ssl
    [mode] => r
    [unread_bytes] => 438
    [seekable] => 
    [uri] => http://www.example.com/
    [timed_out] => 
    [blocked] => 1
    [eof] => 
)

Notes

Note:
This function does NOT work on sockets created by the Socket extension.

stream_get_meta_data