Description
bool
socket_set_option ( resource socket, int level, int optname, mixed optval )
The socket_set_option() function sets the option specified by the optname
parameter, at the protocol level specified by the level parameter, to the
value pointed to by the optval parameter for the socket
specified by the socket parameter. socket_set_option()
will return FALSE on failure.
The level parameter specifies the protocol level at
which the option resides. For example, to retrieve options at the socket level,
a level parameter of SOL_SOCKET would be used. Other
levels, such as TCP, can be used by specifying the protocol number of that level.
Protocol numbers can be found by using the getprotobyname() function.
The available socket options are the same as those for the socket_get_option() function.
注:
This function used to be called socket_setopt() prior
to PHP 4.3.0.
socket_set_nonblock