PHP Manual
Socket 函数
Opens a socket on port to accept connections

socket_create_listen

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

socket_create_listen — Opens a socket on port to accept connections

说明

socket_create_listen ( int $port [, int $backlog = 128 ] ) : resource

socket_create_listen() 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.

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 resource 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.

注释

Note:

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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