(PHP 5 >= 5.3.0, PECL intl >= 1.0.0)
Locale::getAllVariants -- locale_get_all_variants — Gets the variants for the input locale
Object oriented style
$locale
   )Procedural style
$locale
   )Gets the variants for the input locale
localeThe locale to extract the variants from
   The array containing the list of all variants subtag for the locale 
   or NULL if not present
  
Example #1 locale_get_all_variants() example
<?php
$arr = locale_get_all_variants('sl_IT_NEDIS_ROJAZ_1901');
var_export( $arr );
?>
Example #2 OO example
<?php
 $arr = Locale::getAllVariants('sl_IT_NEDIS_ROJAZ_1901');
 var_export( $arr );
?>
The above example will output:
array (
    0 => 'NEDIS',
    1 => 'ROJAZ',
    2 => '1901',
)