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stream_socket_server

Contents

(PHP 5, PHP 7)

stream_socket_server — Create an Internet or Unix domain server socket

Description

stream_socket_server ( string $local_socket [, int &$errno [, string &$errstr [, int $flags = STREAM_SERVER_BIND | STREAM_SERVER_LISTEN [, resource $context ]]]] ) : resource

Creates a stream or datagram socket on the specified local_socket.

This function only creates a socket, to begin accepting connections use stream_socket_accept().

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Parameters

local_socket

The type of socket created is determined by the transport specified using standard URL formatting: transport://target.

For Internet Domain sockets (AF_INET) such as TCP and UDP, the target portion of the remote_socket parameter should consist of a hostname or IP address followed by a colon and a port number. For Unix domain sockets, the target portion should point to the socket file on the filesystem.

Depending on the environment, Unix domain sockets may not be available. A list of available transports can be retrieved using stream_get_transports(). See List of Supported Socket Transports for a list of bulitin transports.

errno

If the optional errno and errstr arguments are present they will be set to indicate the actual system level error that occurred in the system-level socket(), bind(), and listen() calls. If the value returned in errno is 0 and the function returned FALSE, it is an indication that the error occurred before the bind() 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.

errstr

See errno description.

flags

A bitmask field which may be set to any combination of socket creation flags.

Note:

For UDP sockets, you must use STREAM_SERVER_BIND as the flags parameter.

context

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Return Values

Returns the created stream, or FALSE on error.

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Examples

Example #1 Using TCP server sockets

<?php
$socket = stream_socket_server("tcp://0.0.0.0:8000", $errno, $errstr);
if (!$socket) {
  echo "$errstr ($errno)<br />\n";
} else {
  while ($conn = stream_socket_accept($socket)) {
    fwrite($conn, 'The local time is ' . date('n/j/Y g:i a') . "\n");
    fclose($conn);
  }
  fclose($socket);
}
?>

The example below shows how to act as a time server which can respond to time queries as shown in an example on stream_socket_client().

Note: Most systems require root access to create a server socket on a port below 1024.

Example #2 Using UDP server sockets

<?php
$socket = stream_socket_server("udp://127.0.0.1:1113", $errno, $errstr, STREAM_SERVER_BIND);
if (!$socket) {
    die("$errstr ($errno)");
}

do {
    $pkt = stream_socket_recvfrom($socket, 1, 0, $peer);
    echo "$peer\n";
    stream_socket_sendto($socket, date("D M j H:i:s Y\r\n"), 0, $peer);
} while ($pkt !== false);

?>

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Notes

Note: When specifying a numerical IPv6 address (e.g. fe80::1), you must enclose the IP in square brackets—for example, tcp://[fe80::1]:80.

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See Also

Find a PHP function

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Document created the 30/01/2003, last modified the 26/10/2018
Source of the printed document:https://www.gaudry.be/en/php-rf-function.stream-socket-server.html

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References

  1. View the html document Language of the document:fr Manuel PHP : http://php.net

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The author This site is solely responsible for the way in which the various concepts, and the freedoms that are taken with the reference works, are presented here. Remember that you must cross multiple source information to reduce the risk of errors.

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