<?php
function kekata($x) {
    $x = abs($x);
    $angka = array("", "satu", "dua", "tiga", "empat", "lima",
    "enam", "tujuh", "delapan", "sembilan", "sepuluh", "sebelas");
    $temp = "";
    if ($x <12) {
        $temp = " ". $angka[$x];
    } else if ($x <20) {
        $temp = kekata($x - 10). " belas";
    } else if ($x <100) {
        $temp = kekata($x/10)." puluh". kekata($x % 10);
    } else if ($x <200) {
        $temp = " seratus" . kekata($x - 100);
    } else if ($x <1000) {
        $temp = kekata($x/100) . " ratus" . kekata($x % 100);
    } else if ($x <2000) {
        $temp = " seribu" . kekata($x - 1000);
    } else if ($x <1000000) {
        $temp = kekata($x/1000) . " ribu" . kekata($x % 1000);
    } else if ($x <1000000000) {
        $temp = kekata($x/1000000) . " juta" . kekata($x % 1000000);
    } else if ($x <1000000000000) {
        $temp = kekata($x/1000000000) . " milyar" . kekata(fmod($x,1000000000));
    } else if ($x <1000000000000000) {
        $temp = kekata($x/1000000000000) . " trilyun" . kekata(fmod($x,1000000000000));
    }
        return $temp;
}
function terbilang($x, $style=4) {
    if($x<0) {
        $hasil = "minus ". trim(kekata($x));
    } else {
        $hasil = trim(kekata($x));
    }
    switch ($style) {
        case 1:
            $hasil = strtoupper($hasil);
            break;
        case 2:
            $hasil = strtolower($hasil);
            break;
        case 3:
            $hasil = ucwords($hasil);
            break;
        default:
            $hasil = ucfirst($hasil);
            break;
    }
    return $hasil;
}

//echo terbilang(999999999,3);
?>