<?php
$coll = collator_create( 'en_US_California' );
$res_val = collator_get_locale( $coll, Locale::VALID_LOCALE );
$res_act = collator_get_locale( $coll, Locale::ACTUAL_LOCALE );
printf( "Valid locale name: %s\nActual locale name: %s\n",
$res_req, $res_val, $res_act );
?>
The above example will output:
Requested locale name: en_US_California
Valid locale name: en_US
Actual locale name: en