The socket_set_option() function sets the option specified by the optname
parameter, at the specified protocol level
, to the value pointed to by the optval
parameter for the socket
.
A valid socket resource created with socket_create() or socket_accept().
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.
The option value.
Returns TRUE
on success or FALSE
on failure.
<?php $socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP); if (!is_resource($socket)) { echo 'Unable to create socket: '. socket_strerror(socket_last_error()) . PHP_EOL; } if (!socket_set_option($socket, SOL_SOCKET, SO_REUSEADDR, 1)) { echo 'Unable to set option on socket: '. socket_strerror(socket_last_error()) . PHP_EOL; } if (!socket_bind($socket, '127.0.0.1', 1223)) { echo 'Unable to bind socket: '. socket_strerror(socket_last_error()) . PHP_EOL; } $rval = socket_get_option($socket, SOL_SOCKET, SO_REUSEADDR); if ($rval === false) { echo 'Unable to get socket option: '. socket_strerror(socket_last_error()) . PHP_EOL; } else if ($rval !== 0) { echo 'SO_REUSEADDR is set on socket !' . PHP_EOL; } ?>
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