SOCKET_CREATE_LISTEN(3) 1 SOCKET_CREATE_LISTEN(3)socket_create_listen - Opens a socket on port to accept connectionsSYNOPSIS
resource socket_create_listen (int $port, [int $backlog = 128])
DESCRIPTION socket_create_listen(3) creates a new socket resource of type AF_INET listening on all local interfaces on the given port waiting for new
connections.
This function is meant to ease the task of creating a new socket which only listens to accept new connections.
PARAMETERS
o $port
- The port on which to listen on all interfaces.
o $backlog
- The $backlog parameter defines the maximum length the queue of pending connections may grow to. SOMAXCONN may be passed as
$backlog parameter, see socket_listen(3) for more information.
RETURN VALUES socket_create_listen(3) returns a new socket resource on success or FALSE on error. The error code can be retrieved with
socket_last_error(3). This code may be passed to socket_strerror(3) to get a textual explanation of the error.
NOTES
Note
If you want to create a socket which only listens on a certain interface you need to use socket_create(3), socket_bind(3) and
socket_listen(3).
SEE ALSO socket_create(3), socket_create_pair(3), socket_bind(3), socket_listen(3), socket_last_error(3), socket_strerror(3).
PHP Documentation Group SOCKET_CREATE_LISTEN(3)
Check Out this Related Man Page
SOCKET_CREATE_PAIR(3) 1 SOCKET_CREATE_PAIR(3)socket_create_pair - Creates a pair of indistinguishable sockets and stores them in an arraySYNOPSIS
bool socket_create_pair (int $domain, int $type, int $protocol, array &$fd)
DESCRIPTION socket_create_pair(3) creates two connected and indistinguishable sockets, and stores them in $fd. This function is commonly used in IPC
(InterProcess Communication).
PARAMETERS
o $domain
- The $domain parameter specifies the protocol family to be used by the socket. See socket_create(3) for the full list.
o $type
- The $type parameter selects the type of communication to be used by the socket. See socket_create(3) for the full list.
o $protocol
- The $protocol parameter sets the specific protocol within the specified $domain to be used when communicating on the returned
socket. The proper value can be retrieved by name by using getprotobyname(3). If the desired protocol is TCP, or UDP the corre-
sponding constants SOL_TCP, and SOL_UDP can also be used. See socket_create(3) for the full list of supported protocols.
o $fd
- Reference to an array in which the two socket resources will be inserted.
RETURN VALUES
Returns TRUE on success or FALSE on failure.
CHANGELOG
+--------+---------------------------------------------------+
|Version | |
| | |
| | Description |
| | |
+--------+---------------------------------------------------+
| 5.3.0 | |
| | |
| | This function is now re-enabled on Windows plat- |
| | forms. |
| | |
| 4.3.0 | |
| | |
| | This function was due to a bug made unavailable |
| | on Windows platforms. |
| | |
+--------+---------------------------------------------------+
EXAMPLES
Example #1
socket_create_pair(3) example
<?php
$sockets = array();
/* On Windows we need to use AF_INET */
$domain = (strtoupper(substr(PHP_OS, 0, 3)) == 'WIN' ? AF_INET : AF_UNIX);
/* Setup socket pair */
if (socket_create_pair($domain, SOCK_STREAM, 0, $sockets) === false) {
echo "socket_create_pair failed. Reason: ".socket_strerror(socket_last_error());
}
/* Send and Recieve Data */
if (socket_write($sockets[0], "ABCdef123
", strlen("ABCdef123
")) === false) {
echo "socket_write() failed. Reason: ".socket_strerror(socket_last_error($sockets[0]));
}
if (($data = socket_read($sockets[1], strlen("ABCdef123
"), PHP_BINARY_READ)) === false) {
echo "socket_read() failed. Reason: ".socket_strerror(socket_last_error($sockets[1]));
}
var_dump($data);
/* Close sockets */
socket_close($sockets[0]);
socket_close($sockets[1]);
?>
Example #2
socket_create_pair(3) IPC example
<?php
$ary = array();
$strone = 'Message From Parent.';
$strtwo = 'Message From Child.';
if (socket_create_pair(AF_UNIX, SOCK_STREAM, 0, $ary) === false) {
echo "socket_create_pair() failed. Reason: ".socket_strerror(socket_last_error());
}
$pid = pcntl_fork();
if ($pid == -1) {
echo 'Could not fork Process.';
} elseif ($pid) {
/*parent*/
socket_close($ary[0]);
if (socket_write($ary[1], $strone, strlen($strone)) === false) {
echo "socket_write() failed. Reason: ".socket_strerror(socket_last_error($ary[1]));
}
if (socket_read($ary[1], strlen($strtwo), PHP_BINARY_READ) == $strtwo) {
echo "Recieved $strtwo
";
}
socket_close($ary[1]);
} else {
/*child*/
socket_close($ary[1]);
if (socket_write($ary[0], $strtwo, strlen($strtwo)) === false) {
echo "socket_write() failed. Reason: ".socket_strerror(socket_last_error($ary[0]));
}
if (socket_read($ary[0], strlen($strone), PHP_BINARY_READ) == $strone) {
echo "Recieved $strone
";
}
socket_close($ary[0]);
}
?>
SEE ALSO socket_create(3), socket_create_listen(3), socket_bind(3), socket_listen(3), socket_last_error(3), socket_strerror(3).
PHP Documentation Group SOCKET_CREATE_PAIR(3)