I\'m trying to normalize strings with characters like \'áéíóú\' to \'aeiou\' to simplify searches.
Following the response to this question I should use the Nor
For a function that actually removes the accents, the best that I have found so far is in the wordpress core: https://core.trac.wordpress.org/browser/trunk/src/wp-includes/formatting.php#L1127 remove_accents($string)
(Note I have filed a bug against it in order for them to take an updated version that I provided which documents each character and how it is tranlsted. so it may change in the future)