- var_dump: documentation ( source)
- utf8_encode: documentation ( source)
- setlocale: documentation ( source)
<?php
setlocale(LC_ALL, 'en_US.UTF8');
var_dump(iconv("utf-8","ascii//TRANSLIT", utf8_encode('Äther')));
var_dump(iconv("utf-8","ascii//TRANSLIT",'Regen'));
var_dump(iconv("utf-8","ascii//TRANSLIT",'König'));
var_dump(iconv("utf-8","ascii//TRANSLIT",'Straße'));