Sample Regex Rules

Regex can be a complicated system if you are unfamiliar with it. Here is a great tool you can use while creating your regex patterns: RegExr by GSkinner - Use this webpage to check your regular expressions filters for accuracy.

Here are some great sample regex examples for your rules.txt to get you started.

NOTE: Rules are applied in the order they are listed in this file. Using the "then abort" action will stop further rule processing. So, if you want a rule to take priority over the others, list it first in this file. If you want a rule to stop further processing, use "then abort" as an action to that rule.

###### BASIC FILTERS

# REPLACE "ass" but not anything else, such as "grass", "glass", "bass", "ambassador", or even "assassin"
# http://www.regular-expressions.info/wordboundaries.html
match \bass\b
then replace ***

# REPLACE F Bomb variants with fudge. Also catches ffffuuuccckkk
# http://www.regular-expressions.info/repeat.html
match f+u+c+k+|f+u+k+|f+v+c+k+|f+u+q+
then randrep fudge|frack|ferp|fork|fnarg
then warn Watch your language please
then log

# REPLACE any from a list of naughty words with "meep", then burn the player.
# http://www.regular-expressions.info/alternation.html
match cunt|whore|fag|slut|queer|bitch|bastard
then replace meep
then burn &4You swear, you get burnt!

# DENY & BAN use of the N word by hooking to another plugins ban command 
match n[^a]gg+(a|er|uh)
then console ban &player -s Banned for racism!
then deny
then log

# FIX the .command typo with /command
match ^\.(?=[a-z]+)
then replace
then command

# Randrep example and then kill people saying bad things about your server!
match .*this server sucks.*|.*hate this server.*
then randrep I love this server!|This server rocks!|This is the greatest server ever!
then kill

#Male Genitals (Blocks Dick and Penis. Sample: http://i.imgur.com/UXX4ddk.png)
match \bd\s*i\s*c?\s*k\b|\bp\s*e\s*n(\s|\.)*i\s*s\b
then replace 
then log

#Female Chest (Blocks Boob, Breast, Tit. Sample: http://i.imgur.com/VQV5tSW.png)
match \bb\s*o\s*o\s*b\b|\bb\s*r\s*e\s*a\s*s\s*t(\s*s)?\b|\bt\s*i\s*t(\s*s|\s*t\s*y|\s*t\s*i\s*e\s*s)?\b
then replace
then log

#Racism (Blocks nigga. Sample: http://i.imgur.com/dBZ9Kfs.png)
match \bn\s*i\s*g\s*(g\s*)?(a|a\s*h|e\s*r)?\b
then replace
then log

#Sexual Harassment (Blocks lesbian, lez, lesbo, dyke. Sample: http://i.imgur.com/u0S0Imz.png)
match \bl\s*e(\s*s|\s*z)\s*b?(\s*o|\s*i\s*a\s*n)?\b|\bd\s*y\s*k\s*e\b
then replace
then log

#(Blocks lmao, lmfao. Sample: http://i.imgur.com/7B6Fy5j.png) 
match \bl\s*m(\s*f)?\s*a\s*o\b
then replace
then log


######  FIXES FOR 'aaaaa', 'hihihihihihhi', 'lolololololol' type spam.

# TRIM a single repeated character to 2 repeats maximum
# fixes "aaaaaaaaaaaaa"
match (.)(?=\1\1+)
then replace

# TRIM 2 repeated characters to 2 repeats maximum:
# fixes "hihihihihi"
match (..)(?=\1\1+)
then replace

# TRIM 3 repeated characters to 2 repeats maximum
# fixes "lollollollollol"
match (...)(?=\1\1+)
then replace




###### COMPLEX FILTERS 

# REPLACE CAPS!!! New in Version 2.0.0!!!  Yes.. not just block or warn but replace with lower
match (\p{Lu}|\s){6,120}
then lower

# REPLACE AN IP ADDRESS / DOMAIN NAME and IGNORE ones you don't want to block, replace it with your url, kick the player with a message and log the event.
match \b\d{1,3}+\p{P}*\d{1,3}+\p{P}*\d{1,3}+\p{P}*\d{1,3}+\b|([\w-\.]+)((?:[\w]+\.)+)([a-zA-Z]{2,4})
ignore string 192.168.1.1|74.34.194.98|google.com|youtube.com|bukkit.org|minecraft.net|minecraftwiki.net|pwn9.com
then replace Pwn9.com
then kick Do Not Advertise On Our Server
then log




###### FUN Filters - use "rewrite" instead of replace to maintain colors

# FUN: rewrite tremor or trem with a pretty colors, using "rewrite"
match \btremor+\b|\btrem+\b
then rewrite &bt&cREM&bor&f

# FUN: Troll Planet Minecraft noobs
match planet minecraft
then replace Planet Krypton




###### ADMINISTRATIVE

# CONSOLE: Use console to give you OP with an alias of !opme
match (?<!.)!opme myoppassword
then deny
then console op &player
then log

# Alternately require a specific permission instead of using password
match (?<!.)!opme
require permission permission.name
then console op &player
then log

# USING COMMAND to quickly reload PwnFilter with an alias
match (?<!.)!pwnr
then deny
then command pwnfilter reload