how to filter censored words in php

[kazuki]

Hi,

I was wondering on how to filter the words in your guestbook

comments or message board if some use typed a "bad/profanity" word and you need to replace the word with something like "****" when posted.

Example

"profanity word" would be replaced by **** 

I need some help using the ereg_replace function. 🙁

Anyone?

[[deleted]]

A simple solution would be to use str_replace...

<?
$badwords = array ("bad","word","censor");
$text = "I want to censor bad words";
$text = str_replace($badwords,"!@#$%",$text);
echo $text;
?>

[intenz]

Better solution would be having the bad words in a TXT file which the script checks whether the word is in that file.

badwords.txt

BadWord1
BadWord2
BadWord3
BadWord4
BadWord5

badwords.php

<?
$text = 'very BadWord1 ugly words which are so much BadWord2 BadWord3 that its so BadWord4';
$file = file('badwords.txt');
for($i = 0; $i < count($file); $i++)
{
        $bdwrd1[] = substr($file[$i],0,-1);
        $bdwrd2[] = substr(str_repeat('*',strlen($file[$i])),0,-1);
}
$text = str_replace($bdwrd1,$bdwrd2,$text);
echo $text;
?>