(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: 2021年11月20日 18:17:57 GMT"
[5] =>
string(24) "Etag: "3147526947+ident""
[6] =>
string(38) "Expires: 2021年11月27日 18:17:57 GMT"
[7] =>
string(44) "Last-Modified: 2019年10月17日 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.