(PHP 4, PHP 5, PHP 7 < 7.4.0)
recode_string — Recode a string according to a recode request
$request, string $string): string
   Recode the string string according to
   the recode request request. 
  
requestThe desired recode request type
stringThe string to be recoded
   Returns the recoded string or false, if unable to 
   perform the recode request.
  
Example #1 Basic recode_string() example
<?php
echo recode_string("us..flat", "The following character has a diacritical mark: á");
?>
A simple recode request may be "lat1..iso646-de".