(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)
stream_get_meta_data — Retrieves header/meta data from streams/file pointers
Returns information about an existing stream.
streamThe stream can be any stream created by fopen(), fsockopen()pfsockopen() and stream_socket_client().
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.
crypto (array) - the TLS connection metadata for this stream. (Note: Only provided when the resource's stream uses TLS.)
Example #1 stream_get_meta_data() example using fopen() with http
<?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);
var_dump($meta);
fclose($fp);
?>The above example will output something similar to:
array(10) { 'timed_out' => bool(false) 'blocked' => bool(true) 'eof' => bool(false) 'wrapper_data' => array(13) { [0] => string(15) "HTTP/1.1 200 OK" [1] => string(11) "Age: 244629" [2] => string(29) "Cache-Control: max-age=604800" [3] => string(38) "Content-Type: text/html; charset=UTF-8" [4] => string(35) "Date: Sat, 20 Nov 2021 18:17:57 GMT" [5] => string(24) "Etag: "3147526947+ident"" [6] => string(38) "Expires: Sat, 27 Nov 2021 18:17:57 GMT" [7] => string(44) "Last-Modified: Thu, 17 Oct 2019 07:18:26 GMT" [8] => string(22) "Server: ECS (chb/0286)" [9] => string(21) "Vary: Accept-Encoding" [10] => string(12) "X-Cache: HIT" [11] => string(20) "Content-Length: 1256" [12] => string(17) "Connection: close" } 'wrapper_type' => string(4) "http" 'stream_type' => string(14) "tcp_socket/ssl" 'mode' => string(1) "r" 'unread_bytes' => int(1256) 'seekable' => bool(false) 'uri' => string(23) "http://www.example.com/" }Example #2 stream_get_meta_data() example using stream_socket_client() with https
<?php
$streamContext = stream_context_create(
[
'ssl' => [
'capture_peer_cert' => true,
'capture_peer_cert_chain' => true,
'disable_compression' => true,
],
]
);
$client = stream_socket_client(
'ssl://www.example.com:443',
$errorNumber,
$errorDescription,
40,
STREAM_CLIENT_CONNECT,
$streamContext
);
$meta = stream_get_meta_data($client);
var_dump($meta);
?>The above example will output something similar to:
array(8) { 'crypto' => array(4) { 'protocol' => string(7) "TLSv1.3" 'cipher_name' => string(22) "TLS_AES_256_GCM_SHA384" 'cipher_bits' => int(256) 'cipher_version' => string(7) "TLSv1.3" } 'timed_out' => bool(false) 'blocked' => bool(true) 'eof' => bool(false) 'stream_type' => string(14) "tcp_socket/ssl" 'mode' => string(2) "r+" 'unread_bytes' => int(0) 'seekable' => bool(false) }Note:
This function does NOT work on sockets created by the Socket extension.