Offensive Language Filter

fsoftball

May 23 2005, 07:03 AM

Hi,

I would like to create a demo page to show perspective users how my site will work. This would entail allowing a stranger to fill in several forms. I am concerned that these users will fill in the form with offense content.

Is there an offensive language filter for PHP? For MySQL? Is there something that trap17.com could provied (if so, what lever hosting do you need....free?)

Thanks.

HmmZ

May 23 2005, 10:11 AM

I dont know if this works perfectly, but i did something similar with my chat.

First, when your setting the variable for the users message input:
$usermessage //for example
you filter it with the badwords function, giving:
$usermessage=badwords($usermessage);

then somewhere else (for comfort in the same page) make a bad words filter array

CODE

Function badwords($post)
{
$badwords=array(

'*BLEEP*'=>"$$$$",
'*BLEEP*'=>"%$%#",
'*BLEEP*'=>"^&^%",
'*BLEEP*'=>"@#$#",
'*BLEEP*'=>"@$#@",
//you can easily expand your array

);

$post=str_replace(array_keys($badwords), array_values($badwords), $post);
return $post;
}

Like i said, this is a small amount of code ive taken from my chat but it works great, you can edit it to fit your needs.

snlildude87

May 23 2005, 11:18 AM

I was going to suggest something along the line of using a string replace in PHP to replace offensive words with asterisks and the like, but the problem with this is that you absolutely cannot filter all swear words because users can still use 1337 to bypass all the words that you've blocked.

I suggest using the script that Hmmz has provided and monitor whatever the user sends to you for a couple of times. Then, you can change the script to include more words as necessary.

bjrn

May 23 2005, 06:25 PM

I don't know what you were planning for the demo, but unless you need the prospective users to share content you don't really need a filter, do you? As long as whatever is filled in is only seen by the visitor (and possibly you) then they can type whatever they want.

But otherwise staring off with a reasonable array, and then monitoring input is probably the best option.

Mike

May 23 2005, 10:27 PM

Create a function named censor with the parameter string. Below you will find the function and an example.

CODE

function censor($string) {

$banned_words = array();
$banned_words[] = 'BANNED WORD';
$banned_words[] = 'BANNED WORD';
$banned_words[] = 'BANNED WORD';

foreach ($banned_words AS $banned_word) {

str_replace('$banned_word','-censored-',$string);

}
}

--Example--

CODE

$message = 'What the *BANNED WORD* is your problem?!';
$message = censor($message);

--New Message--

CODE

'What the -censored- is your problem?!'

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