Sample code for the comment parser

Question

Does anyone know any php code example (ideally codeigniter) for parsing user comments. To remove profanity and HTML tags, etc.?

Answer 1

Try strip_tags to get rid of any html submitted. You can use htmlspecialchars to avoid tags if you just want to make sure that no html is displayed in the comments - according to the Matchu example, less unintended effects will occur with it than with strip_tags.

For a word filter, depending on how you want to go, there are many examples on the Internet, from simple to. Here is the code from the example of Jake Olefsky (simple, linked earlier):

<?
//This is totally free to use by anyone for any purpose.

// BadWordFilter
// This function does all the work. If $replace is 1 it will replace all bad words
// with the wildcard replacements.  If $replace is 0 it will not replace anything.
// In either case, it will return 1 if it found bad words or 0 otherwise.
// Be sure to fill the $bads array with the bad words you want filtered.
function BadWordFilter(&$text, $replace)
{
    //fill this array with the bad words you want to filter and their replacements
    $bads = array (
        array("butt","b***"),
        array("poop","p***"),
        array("crap","c***")
    );

    if($replace==1) {                               //we are replacing
        $remember = $text;

        for($i=0;$i<sizeof($bads);$i++) {           //go through each bad word
            $text = eregi_replace($bads[$i][0],$bads[$i][5],$text); //replace it
        }

        if($remember!=$text) return 1;              //if there are any changes, return 1

    } else {                                        //we are just checking

        for($i=0;$i<sizeof($bads);$i++) {           //go through each bad word
            if(eregi($bads[$i][0],$text)) return 1; //if we find any, return 1
        }   

    }
}

//this will replace all bad words with their replacements. $any is 1 if it found any
$any = BadWordFilter($wordsToFilter,1); 

//this will not repace any bad words. $any is 1 if it found any
$any = BadWordFilter($wordsToFilter,0); 

?>

Many other examples of this can be easily found on the Internet.