Check the specified text ($a) for banned words.

If any are found, and the member cannot bypass the word filter, an error message is displayed.

• return: "Fixed" version

• string $a: The sentence to check
• ?ID_TEXT $name: The name of the parameter this is coming from. Certain parameters are not checked, for reasons of efficiency (avoiding loading whole word check list if not needed) (NULL: don't know param, do not check to avoid)
• boolean $no_die: Whether to avoid dying on fully blocked words (useful if importing, for instance)
• boolean $try_patterns: Whether to try pattern matching (this takes more resources)
• boolean $perm_check: Whether to allow permission-based skipping, and length-based skipping

Find whether the current member is a guest.

• return: Whether the current member is a guest

• ?MEMBER $member_id: Member ID to check (NULL: current user)