regexp包含æøåÆØÅ也[关闭]

Question

How can i edit this to also accept æøåÆØÅ?

function validate_username($input, $pattern = '/[^A-Za-z0-9]/')
{
     return !preg_match($pattern, $input);
}

Answer 1

'/[^A-Za-z0-9æøåÆØÅ]/u'

Requires that your php file is saved in UTF-8 and also that the input is UTF-8 as well of course.