Checks if action_name is valid.
action_name is valid if it consists only of alphanumeric characters, plus '-' and '.'. The empty string is not a valid action name.
It is an error to call this function with a non-utf8 action_name. action_name must not be NULL.
a potential action name
TRUE if action_name is valid
2.38
Checks if action_name is valid.
action_name is valid if it consists only of alphanumeric characters, plus '-' and '.'. The empty string is not a valid action name.
It is an error to call this function with a non-utf8 action_name. action_name must not be NULL.