socket_create_listen

(PHP 4 >= 4.1.0, PHP 5, PHP 7, PHP 8)

socket_create_listen — Opens a socket on port to accept connections

说明

socket_create_listen(int $port, int $backlog = 128): Socket|false

socket_create_listen() creates a new Socket instance 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.

参数

port: The port on which to listen on all interfaces.
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() for more information.

返回值

socket_create_listen() returns a new Socket instance on success or false on error. The error code can be retrieved with socket_last_error(). This code may be passed to socket_strerror() to get a textual explanation of the error.

更新日志

版本	说明
8.0.0	On success, this function returns a Socket instance now; previously, a resource was returned.

注释

注意:
If you want to create a socket which only listens on a certain interface you need to use socket_create(), socket_bind() and socket_listen().

参见

socket_create() - 创建一个套接字（通讯节点）
socket_create_pair() - Creates a pair of indistinguishable sockets and stores them in an array
socket_bind() - 给套接字绑定名字
socket_listen() - Listens for a connection on a socket
socket_last_error() - Returns the last error on the socket
socket_strerror() - Return a string describing a socket error

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User Contributed Notes 4 notes

down

jdittmer at ppp0 dot net ¶

17 years ago


If you specify no port number, or 0, a random free port will be chosen.

To use ports for ipc between client/server on the same machine you can use (minus error checking)


server.php:

<?php

$sock = socket_create_listen(0);

socket_getsockname($sock, $addr, $port);

print "Server Listening on $addr:$port\n";

$fp = fopen($port_file, 'w');

fwrite($fp, $port);

fclose($fp);

while($c = socket_accept($sock)) {

   /* do something useful */

   socket_getpeername($c, $raddr, $rport);

   print "Received Connection from $raddr:$rport\n";

}

socket_close($sock);

?>



client.php:

<?php

$fp = fopen($port_file, 'r');

$port = fgets($fp, 1024);

fclose($fp);

$sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);

socket_connect($sock, '127.0.0.1', $port);

socket_close($sock);

?>

down

sysspoof at ng-lab dot org ¶

14 years ago


Please note that port 1 to and with 1024 on linux and bsd system require root privileges. So it is recommended to choose a higher port for your own application.

down

basim at baassiri dot com ¶

18 years ago


Remember that ports are only valid from 1 - 65535


[editor's note: typo fixed, thanks abryant at apple dot com]

down

-15

aeolianmeson at ifacfchi dot blitzeclipse dot com ¶

13 years ago


I believe that on some systems this may not bind to some or all public interfaces.

On my Windows system, I could not connect on the public interface using this, but could when I made the individual calls to create, bind, and listen.

Dustin Oprea

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官方地址：https://www.php.net/manual/en/function.socket-create-listen.php

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socket_create_listen

说明

参数

返回值

更新日志

注释

参见

User Contributed Notes 4 notes