RegEx- removing anything but letters, spaces, and numbers

How do I go about removing everything in a string besides letters, spaces, and digits?

So far I have

$newvar = ereg_replace("[^A-Za-z0-9]", "", $string);

That takes care of the letters and digits, but not the spaces.

Help?

 

$newvar = preg_replace ('/[^a-z0-9 ]+/i', '', $string);

PHP:

use preg_replace because it's usually faster than it's ereg counterpart.

 

You can also use:

<?
    $newvar = preg_replace('/[^a-z0-9\s]+/i', '', $string);
?>

Code (markup):

 

Good call, and Welcome to the forums Drew!