stream_socket_client
(PHP 5)
stream_socket_client — Open Internet or Unix domain socket connection
설명
resource stream_socket_client
( string $remote_socket
[, int &$errno
[, string &$errstr
[, float $timeout = ini_get("default_socket_timeout")
[, int $flags = STREAM_CLIENT_CONNECT
[, resource $context
]]]]] )
Note:
The stream will by default be opened in blocking mode. You can
switch it to non-blocking mode by using
stream_set_blocking().
인수
-
remote_socket
-
Address to the socket to connect to.
-
errno
-
Will be set to the system level error number if connection fails.
-
errstr
-
Will be set to the system level error message if the connection fails.
-
timeout
-
Number of seconds until the connect() system call
should timeout.
Note:
This parameter only applies when not making asynchronous
connection attempts.
Note:
To set a timeout for reading/writing data over the socket, use the
stream_set_timeout(), as the
timeout only applies while making connecting
the socket.
-
flags
-
Bitmask field which may be set to any combination of connection flags.
Currently the select of connection flags is limited to
STREAM_CLIENT_CONNECT (default),
STREAM_CLIENT_ASYNC_CONNECT and
STREAM_CLIENT_PERSISTENT.
-
context
-
A valid context resource created with stream_context_create().
오류/예외
On failure the errno and
errstr arguments will be populated with the actual
system level error that occurred in the system-level
connect() call. If the value returned in
errno is 0 and the
function returned FALSE, it is an indication that the error
occurred before the connect() call. This is
most likely due to a problem initializing the socket. Note that
the errno and
errstr arguments will always be passed by
reference.
예제
Example #1 stream_socket_client() example
<?php
$fp = stream_socket_client("tcp://www.example.com:80", $errno, $errstr, 30);
if (!$fp) {
echo "$errstr ($errno)<br />\n";
} else {
fwrite($fp, "GET / HTTP/1.0\r\nHost: www.example.com\r\nAccept: */*\r\n\r\n");
while (!feof($fp)) {
echo fgets($fp, 1024);
}
fclose($fp);
}
?>
Example #2 Using UDP connection
Retrieving the day and time from the UDP service "daytime" (port 13)
on localhost.
<?php
$fp = stream_socket_client("udp://127.0.0.1:13", $errno, $errstr);
if (!$fp) {
echo "ERROR: $errno - $errstr<br />\n";
} else {
fwrite($fp, "\n");
echo fread($fp, 26);
fclose($fp);
}
?>
주의
Warning
UDP sockets will sometimes appear to have opened without an error,
even if the remote host is unreachable. The error will only
become apparent when you read or write data to/from the socket.
The reason for this is because UDP is a "connectionless" protocol,
which means that the operating system does not try to establish
a link for the socket until it actually needs to send or receive data.
Note: 숫자로 이루어진 IPv6 주소(예.
fe80::1)를
지정할 때는 IP를 대괄호로 감싸야 합니다. 예를 들면,
tcp://[fe80::1]:80.
Note:
Depending on the environment, the Unix domain or the optional
connect timeout may not be available. A list of available
transports can be retrieved using stream_get_transports().
See 지원되는 소켓 전송 목록 for a list of built in transports.