preg_match array items in string?

Question

Lets say I have an array of bad words:

$badwords = array(\"one\", \"two\", \"three\");

And random string:

$string = \"some          


        

Answer 1

Why do you want to use preg_match() here?
What about this:

foreach($badwords as $badword)
{
  if (strpos($string, $badword) !== false)
    echo "sorry bad word found";
  else
    echo "string contains no bad words";
}

If you need preg_match() for some reasons, you can generate regex pattern dynamically. Something like this:

$pattern = '/(' . implode('|', $badwords) . ')/'; // $pattern = /(one|two|three)/
$result = preg_match($pattern, $string);

HTH