highlighting key words

OwenTheSamoan

I'm using this code to pick out unsuitable words from members that submit text to my site. Instead of substituting the bad words with ###. Is it possible to highlight these unsuitable words in a different color instead of substituting them with ### ? This is the coding I am using now. Thank in advance for any help.

$delimiter="###";

$bad_words = array("bad_word", "another_bad_word");

$new_string = str_replace($bad_words,$delimiter, strtolower($message));

$arr = explode($delimiter, $new_string);

$nr_occurences = count($arr) - 1;

if ($nr_occurences > 0) {

echo "$new_string";

}

bpat1434

Of course, just use a small loop:

<?php
$bad_color = '#900';
$badwords = array("bad_word", "another_bad_word"):

foreach($badwords as $word)
{
  $replacement = '<span style="color:'.$bad_color.';">'.$word.'</span>';
  $new_string  = str_replace($word, $replacement, strtolower($message));
}
echo $new_string;
?>

OwenTheSamoan

This worked partially. It only took the last word listed in the $badwords array and only highlighted that one when I printed out the whole message. Is it possible to highlight more than one at a time?
Thanks again for the help!

bpat1434

<?php
$bad_color = '#900';
$badwords = array("bad_word", "another_bad_word"):

foreach($badwords as $word)
{
  $replacement = '<span style="color:'.$bad_color.';">'.$word.'</span>';
  $message  = str_replace($word, $replacement, strtolower($message));
}
echo $message;
?>

But normally if it only replaces one, it's because it only finds one...

OwenTheSamoan

That's very interesting. When I changed the Variable to $message and echo $message like you have here every bad word is highlighted like it should be. But shouldn't it have worked the same whether the variable is $message or anything else? It works perfectly now, but I'm a little confused as to what the real difference was between $message and $new_string.

bpat1434

no, it shouldn't. Reason is this:

You go through message and replace all badword1's with the div. You write the variable named $new_string.
You go through and replace all badword2's with the div from the original message. You overwrite $new_string with the new message.

So each subsequent loop destroys what the previous loop did....

So by always writing to $message, it keeps updating itself...

Understand?