(PHP 4 >= 4.1.0, PHP 5)
socket_close() closes the socket resource given by socket.
注: 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().