PHP replacing special characters like à->a, è->e

Question

I have php document signup.php which save the content from form (in form.php document) to MySQL base. The problem arises when I want to reformat the input content. I want do

Answer 1

As of PHP >= 5.4.0

$translatedString = transliterator_transliterate('Any-Latin; Latin-ASCII; [\u0080-\u7fff] remove', $string);