预定义常量
PHP Manual

RADIUS Options

Several RADIUS functions accept option flags as bitmasks. The constants representing those flags are listed below.

RADIUS_OPTION_SALT (integer)

When set, this option will result in the attribute value being salt-encrypted.

RADIUS_OPTION_TAGGED (integer)

When set, this option will result in the attribute value being tagged with the value of the tag parameter.


预定义常量
PHP Manual