Remove bad words (swearwords) in PHP

badwords.php Code

This is the PHP code file.

function censor($string)
{
if ($string)
{
$badwords = file_get_contents("badwords.txt");
$badwords = explode(",", $badwords);
$replacewith = array();
$index = 0;
foreach ($badwords as $value) {
$lengthOfStars = strlen($badwords[$index]) - 2;
$replacewith[$index] = substr($badwords[$index], 0, 1).str_repeat("*", $lengthOfStars).substr($badwords[$index], -1);
$index++;
}
$newstring = str_ireplace($badwords, $replacewith, $string);
return $newstring;
}
}

echo censor("Some really bad swear words to remove");
?>

badwords.txt File

bad,words