Regex to remove non alphanumeric characters from UTF8 strings

Question

How can I remove characters, like punctuation, commas, dashes etc from a string, in a multibyte safe manner?

I will be working with input from many different languag

Answer 1

I used this:

$clean = preg_replace( "/[^\p{L}|\p{N}]+/u", " ", $raw );
$clean = preg_replace( "/[\p{Z}]{2,}/u", " ", $clean );