socket_close Closes a socket resource voidsocket_close resourcesocket &warn.experimental.func; socket_close closes the socket resource given by socket. socket_close can't be used on PHP file resources created with fopen, popen, fsockopen, or pfsockopen; it is meant for sockets created with socket_create or socket_accept. See also socket_bind, socket_listen, socket_create and socket_strerror.