(PHP 4 >= 4.1.0, PHP 5, PHP 7)
socket_listen — Listens for a connection on a socket
$backlog= 0 ] )
After the socket
socket has been created
using socket_create() and bound to a name with
socket_bind(), it may be told to listen for incoming
socket_listen() is applicable only to sockets of
A valid socket resource created with socket_create().
A maximum of
backlog incoming connections will be
queued for processing. If a connection request arrives with the queue
full the client may receive an error with an indication of
ECONNREFUSED, or, if the underlying protocol supports
retransmission, the request may be ignored so that retries may succeed.
The maximum number passed to the
backlogparameter highly depends on the underlying platform. On Linux, it is silently truncated to
SOMAXCONN. On win32, if passed
SOMAXCONN, the underlying service provider responsible for the socket will set the backlog to a maximum reasonable value. There is no standard provision to find out the actual backlog value on this platform.
TRUE on success or
FALSE on failure. 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