preg_replace & case sensitivity - Profanity Filter 1

[jimoblak]

Is there a way to make preg_replace case insensitive?

I am working on a profanity filter and so far have the following:

$input=strtolower ($input);
$pattern = array ("/butt/","/poop/"
$replace = array ("rear","feces"
$output=preg_replace($pattern, $replace, $input);

I must drop the input to lower case so that 'Butt' or 'BUTT' is properly replaced.

The problem is that the entire string gets dropped to lower case: (Example: 'You are a BUTT!!!' becomes 'you are a butt!!!'). I would like to keep the safe words unchanged. Does anyone have an idea of how to pull this off?

Better yet... Can anyone point me to a good snippet for a profanity filter?

 

[sleipnir214]

Use the "/i" modifier. The script:

<?php
print '<pre>';
$foo = &quot;aAaAa&quot;;
$bar = preg_replace ('/a/', 'B', $foo);
print $bar . &quot;\n&quot;;
$bar = preg_replace ('/a/i', 'B', $foo);
print $bar;
?>

Produces the output:
BABAB
BBBBB

If you have a list of proscribed words, you can hand them to preg_replace in an array. Want the best answers? Ask the best questions:

http://www.catb.org/~esr/faqs/smart-questions.html

TANSTAAFL!