enhanced all locale weekday names function

function get_list_of_weekdays_in_locale(){

// let's remember the current local setting
    $oldLocale = setlocale( LC_TIME, '0' );

// initialize out result array
    $localizedWeekdays = array();

    $locales = explode(PHP_EOL,shell_exec('locale -a'));

    foreach( $locales as $locale ) {

        $preferred_locale = setlocale(LC_TIME, $locale);

        $localizedWeekdays[$preferred_locale] = array();

        // 7 days in a week
        for ( $i = 0; $i < 7; $i ++ ) {
            // set the locale on each iteration again
            setlocale( LC_TIME, $locale );

            // combine strftime() with the nifty strtotime()
            $localizedWeekdays[ $locale ][] = strftime( '%A', strtotime( 'next Monday +' . $i . ' days' ) );

            // reset the locale for other threads, as a courtesy
            setlocale( LC_TIME, $oldLocale );
        }

    }

// there is your result in a multi-dimensional array
    return $localizedWeekdays;
}