<?php
$req = 'fr_FR_PARIS';
$fmt = numfmt_create( $req, NumberFormatter::DECIMAL);
$res_val = numfmt_get_locale( $fmt, Locale::VALID_LOCALE );
$res_act = numfmt_get_locale( $fmt, Locale::ACTUAL_LOCALE );
printf( "Requested locale name: %s\nValid locale name: %s\nActual locale name: %s\n",
$req, $res_val, $res_act );
?>
The above example will output:
Requested locale name: fr_FR_PARIS
Valid locale name: fr_FR
Actual locale name: fr