Quicky RegExp question (not syntax, just functionality)

dbmasters

I am trying to make a vulgarity filter, and I am wondering if I use str_replace() will it replace all variations of the word? Or does it just look at each word from beginning white space to end whitespace? Or is it letter by letter?

In otherwords will doing a str_replace looking for sht (I am editing to have a little class) will it replace sht, shtter, shtty, etc? Or will I have to filter for every variation?

this is what I planned to use.

$body = str_replace("sh*t", "s**t", $body);

will that remove all variations, if not, or does anyone have a better suggestion that will?

Thanks gang.

james_holden

You can modify it to take account for words ending in "sh*t" which are innocent.


$swear_filter = Array("shit","fuck","crap");

do {
$current_filter = current($swear_filter);
if (eregi("(.*)$current_filter(.*)",$word)){
 $word = eregi_replace("$current_filter","[BLOCKED]",$word);
}
} while (next($swear_filter));

echo $word;

dbmasters

very cool, I was just starting to code this same type of thing, as I just had "ass" censor the word "bass", and since I am running a home recording studio community, I am guessing the word "bass" will come up a fair amount of times. 😉

Thanks for validating that I was on the right track...thank you very much!

dbmasters

OK, this is the exact code I am using, I have set it up as a user-defined function so I can use it throughout the whole site, and as I improve it and such it is easier to update.

Function naughtyWords($input)
{
$naughty=array("shit","fuck","bitch");
do
{
$current_word=current($naughty);
if(eregi("(.)$current_word(.)",$input))
{
$input=eregi_replace($current_word,"[censored]", $input);
}
}
while(next($naughty));
return $input;
}

and it really works great, though I want to add funrther functionality to it.

The problem is it seems to slow down page load time a lot more than I thought. Is there anything you see that would cause that? I took out a little frivolous code and such I didn't need that invloved extra queries and such, but it was very little help.

Any thoughts?

br__ken

function blockwords($txt)
{
	$arr=array("/shit/i"=>"s**t", "/fuck/i"=>"f**k","/ass/i"=>"a$$");
	return preg_replace(array_keys($arr),array_values($arr),$txt);
}

echo blockwords("fuck you shithead, im an ass");

curses AND arrays in one post! im dreaming 😃

to add more:
/word/i => w**d

(follow preg regx syntax, meaning it needs a delimeter ( / , or something like that ) and i = case insensitive)

preg match is speedy too 🙂 (not like it matters w/o replacing a LOT) and its not contained within a loop-> so it should work faster

dbmasters

and you completed the testostermone thread with mentioning beer too...now we just need guns and a firing range and we are good to go :-)

Thanks for the tip, let me ask you this, filtering with "/shit/i" will it take out, shit, shithead and dumbshit? so will to look for anything on either side of the string?

This has actually proven to be a very interesting little project...thanks for the help gang.

Ooooooo, that's a sweet little bit of code, VERY quick, thanks!

br__ken

Originally posted by dbmasters
and you completed the testostermone thread with mentioning beer too...now we just need guns and a firing range and we are good to go :-)

Thanks for the tip, let me ask you this, filtering with "/shit/i" will it take out, shit, shithead and dumbshit? so will to look for anything on either side of the string?

This has actually proven to be a very interesting little project...thanks for the help gang.

if you want to just block shit, add the /^shit$/i .. (i think thats the preg way to do it, i know its eregi..)
anyways, just add the ^ (start) and $(end) so it will ONLY match shit.. not shithead,dumbshit,asscockshit ,etc.. 🙂

oh guns you say? (it didnt insert it 🙁)

edit: i love whoever introduced me to that replace code🙂 ive been using it for everything since then.. i never knew array_keys/values even existed

dbmasters

hehehe, that little image rocks! I'm stealing that! 😉

actually, I want to match all the variations...so it's good that it does. I thought it would, but wasn't sure.

Ya, that key/values thing is great, I never used those before, you can bet I will again though!

thanks for da help, that is WAY faster than the one I was using, now the trick is to keep "ass" from censoring "bass" but still censoring "dumbass"...I dunno, I am pretty happy with my progress for today I think 🙂

br__ken

dumbass but not bass.. hmm well this isnt really 100% but it will match dumbass and not bass 🙂

/(.*)ass/i => arse (or soemthing like that)

but to make that work with
blockwords("im a bass, not a dumbass");
i had to take out the "/ass/i=>a**" thing

if you wanna steal my emoticons or have thousands to steal check this:

http://zbdesign.biz/tagboard/about.php <mine
http://mysmilies.com <where i stole mine 🙂

dbmasters

:: sets bookmarks ::

thanks for the links, those are pretty cool.

Ya, I really wouldn't worry much about the bass vs. dumbass thing, but my website is a community for home recording studio owners and such, so the word "bass" comes up quite a bit...and the word ass does as well when things get touchy...you know how artists can get when their egos get bruised...

Anyway, I will have to do some fancy regexp work I guess to make it perfect, but this certainly helped. Thank you.

This is a forum I coded totally myself...well, the entire community, so I am eager to have as much functionality as possible...and it's been a great learning experience.

br__ken

since i answer your question a LOT on here i made a somewhat-tutorial.

if you have any questions, check this out first 🙂 it explains it fairly good i think

http://zbdesign.biz/code/user.code.php
(name: array_replace.php)

dbmasters

OK, this has worked very successfully and processes very quickly...

Function naughtyWords($input)
{
$naughty=array(
"/shit/i"=>"[censored]",
"/fuck/i"=>"[censored]",
"/bitch/i"=>"[censored]"
);
return preg_replace(array_keys($naughty),array_values($naughty),$input);
}

However I tried to add another element to the top of the list:

"/^{ass$/i"=>"<font} color=\"#FF0000\">[censored]",

and it does not work right, from everything I have read that is proper regexp to filter just "ass" not "bass" or "assume" for example. Also, I tried to remove the array_values and just hardcode the [censored] thing in there since that is what I use for all of them, but that didn't work either, does kay not work without values?

Does preg_* use some sort of different regexp syntax?