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This is a simple file based bad word filter PHP function. The function offers a variety of options.
You can choose how many letters of the bad word you wish to keep, which character you want to use as the badword "bleeper"
as well as a rating for the bad word.
The bad words file would be formatted like this:
9badword
2anther badword
7A bad word Phrase
7YetAnotherWord
The first character number is the bad word "rating" the higher the number the worse the word.
This can be useful in say, a forum situation where a user can specify their bad word tolerance.
So if I pass the function a bad word tolerance of 5,
the function will only remove words with a tolerance rating higher than 5.
A sample function call would look like this:
$myString = "This is a sentence with some badwords, It is an example based on the Yetanotherword file above.";
echo filterBadWords($myString,"badwords.txt","*",1,3);
If our above badwords file was used for this string the output would result in:
This is a sentence with some b******s, It is an example based on the Y************* file above.
Here is the function code:
<?PHP
function filterBadWords($str,$badWordsFile,$replaceChar="*",$showLetters=0,$rating=0){
// check for the badwords file
if(!is_file($badWordsFile)){
echo 'ERROR: Could not find badwords file "'.$badWordsFile.'"';
exit;
}
else{
//open or file as resource $handle
$handle = fopen($badWordsFile,"r");
}
// while we're not at eof (End Of File) do this
while(!feof($handle)){
$badword = trim(fgets($handle)); // get the word from the file
$word_rating = substr($badword,0,1); // get the badword "rating", word is in format 5myBadWord
$badword = substr($badword,1); //take the rating off of the badword so we have just the badword left
//if my word rating is greater than my exceptable level bleep it out
if($word_rating>$rating){
// look for and take out our bad word
$str = eregi_replace($badword, substr($badword,0,$showLetters).sprintf("%'".$replaceChar.(strlen($badword)-$showLetters)."s", NULL), $str);
}
}
//return our formatted string
return $str;
}
?>
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