Anchor function in v3 throws an error if uri is an array

Hello team,

this error can easily be fixed in url_helper.php (around line 160) by adding brackets around the preg_match expression like this

Code:

$site_url = is_array($uri)
           ? site_url($uri)
           : ( preg_match('#^(\w+:)?//#i', $uri) ? $uri : site_url($uri) );

Thank you
Lenny