Remove Acentos PHP

function retiraAcentos($string){
   $mapeamento = array('À'=>'A','Á'=>'A','Â'=>'A','Ã'=>'A','Ä'=>'A','Å'=>'A','Æ'=>'A','Ç'=>'C','È'=>'E','É'=>'E','Ê'=>'E','Ë'=>'E','Ì'=>'I','Í'=>'I','Î'=>'I','Ï'=>'I','Ð'=>'D','Ñ'=>'N','Ò'=>'O','Ó'=>'O','Ô'=>'O','Õ'=>'O','Ö'=>'O','Ø'=>'0','Ù'=>'U','Ú'=>'U','Û'=>'U','Ü'=>'U','Ý'=>'Y','Þ'=>'P','ß'=>'N','à'=>'a','á'=>'a','â'=>'a','ã'=>'a','ä'=>'a','å'=>'a','æ'=>'e','ç'=>'c','è'=>'e','é'=>'e','ê'=>'e','ë'=>'e','ì'=>'i','í'=>'i','î'=>'i','ï'=>'i','ð'=>'o','ñ'=>'n','ò'=>'o','ó'=>'o','ô'=>'o','õ'=>'o','ö'=>'o','ø'=>'0','ù'=>'u','ú'=>'u','û'=>'u','ý'=>'y','ý'=>'y','þ'=>'p','ÿ'=>'y','Ŕ'=>'R','ŕ'=>'r');
   $string = strtr($string, $mapeamento);
   $string = str_replace(" ",".",$string);
   return utf8_decode($string);
}