[FIXED] How to remove diacritics from text?

Issue

I am making a swedish website, and swedish letters are å, ä, and ö.

I need to make a string entered by a user to become url-safe with PHP.

Basically, need to convert all characters to underscore, all EXCEPT these:

 A-Z, a-z, 1-9

and all swedish should be converted like this:

'å' to 'a' and 'ä' to 'a' and 'ö' to 'o' (just remove the dots above).

The rest should become underscores as I said.

Im not good at regular expressions so I would appreciate the help guys!

Thanks

NOTE: NOT URLENCODE...I need to store it in a database... etc etc, urlencode wont work for me.

Solution

// normalize data (remove accent marks) using PHP's *intl* extension
$data = normalizer_normalize($data);

// replace everything NOT in the sets you specified with an underscore
$data = preg_replace("#[^A-Za-z1-9]#","_", $data);

Answered By - Jeremy L

Answer Checked By - Senaida (PHPFixing Volunteer)