I need a simple word filter that will kill a script if it detects a filtered word in a string.
say my words are as below
$showstopper = array(badword1, badword2, badword3, badword4);
$yourmouth = "im gonna badword3 you up";
if(something($yourmouth, $showstopper)){
//stop the show
}
You could implode the array of badwords into a regular expression, and see if it matches against the haystack. Or you could simply cycle through the array, and check each word individually.
From the comments:
$re = "/(" . implode("|", $showstopper) . ")/"; // '/(badword1|badword2)/'
if (preg_match($re, $yourmouth) > 0) { die("foulmouth"); }
in_array() is your friend
$yourmouth_array = explode(' ',$yourmouth);
foreach($yourmouth_array as $key=>$w){
if (in_array($w,$showstopper){
// stop the show, like, replace that element with '***'
$yourmouth_array[$key]= '***';
}
}
$yourmouth = implode(' ',$yourmouth_array);
You might want to benchmark this vs the foreach
and preg_match
approaches.
$showstopper = array('badword1', 'badword2', 'badword3', 'badword4');
$yourmouth = "im gonna badword3 you up";
$check = str_replace($showstopper, '****', $yourmouth, $count);
if($count > 0) {
//stop the show
}
A fast solution involves checking the key as this does not need to iterate over the array. It would require a modification of your bad words list, however.
$showstopper = array('badword1' => 1, 'badword2' => 1, 'badword3' => 1, 'badword4' => 1);
$yourmouth = "im gonna badword3 you up";
// split words on space
$words = explode(' ', $yourmouth);
foreach($words as $word) {
// filter extraneous characters out of the word
$word = preg_replace('/[^A-Za-z0-9]*/', '', $word);
// check for bad word match
if (isset($showstopper[$word])) {
die('game over');
}
}
The preg_replace ensures users don't abuse your filter by typing something like bad_word3. It also ensures the array key check doesn't bomb.
not sure why you would need to do this but heres a way to check and get the bad words that were used
$showstopper = array(badword1, badword2, badword3, badword4);
$yourmouth = "im gonna badword3 you up badword1";
function badWordCheck( $var ) {
global $yourmouth;
if (strpos($yourmouth, $var)) {
return true;
}
}
print_r(array_filter($showstopper, 'badWordCheck'));
array_filter() returns an array of bad words, so if the count() of it is 0 nothign bad was said