Fungsi Terbilang (Complete)

<?php
function terbilang($num){
    $digits = array("nol","satu","dua","tiga","empat","lima","enam","tujuh","delapan","sembilan");
    $orders = array(0=>"",1=>"puluh",2=>"ratus",3=>"ribu",6=>"juta",9=>"miliar",12=>"trilyun",15=>"kuadriliun");
    $is_neg = $num<0;

    // angka di kiri desimal
    $int = "";
    if(preg_match("/^[+-]?(\d+)/",$num,$m)) $int = $m[1];
    $mult = 0;
    $wint = "";

    // ambil ribuan/jutaan/dst
    while(preg_match('/(\d{1,3})$/',$int,$m)){
        // ambil satuan, puluhan dan ratusan
        $s = $m[1] % 10;
        $p = ($m[1] % 100 - $s)/10;
        $r = ($m[1] - $p*10 - $s)/100;

        // konversi ratusan
        if($r==0)
            $g = "";
        elseif($r==1)
            $g = "se$orders[2]";
        else
            $g = $digits[$r]." $orders[2]";

        // konversi puluhan dan satuan
        if($p==0){
            if($s==0);
            elseif($s==1)
                $g = ($g ? "$g ".$digits[$s] : ($mult==0 ? $digits[1] : "se"));
            else
                $g = ($g ? "$g " : "").$digits[$s];
        }elseif($p==1){
            if($s==0)
                $g = ($g ? "$g " : "")."se$orders[1]";
            elseif($s==1)
                $g = ($g ? "$g " : "")."sebelas";
            else
                $g = ($g ? "$g " : "").$digits[$s]." belas";
        }else{
            $g = ($g ? "$g " : "").$digits[$p]." puluh".($s>0 ? " $digits[$s]" : "");
        }

        // gabungkan hasil sebelumnya
        $wint = ($g ? $g.($g=="se" ? "" : " ").$orders[$mult] : "").($wint ? " $wint" : "");

        // pangkas ribuan/jutaan/dsb yang sudah dikonversi
        $int = preg_replace('/\d{1,3}$/','',$int);
        $mult += 3;
    }
    if(!$wint) $wint = $digits[0];

    // angka di kanan desimal
    $frac = "";
    if(preg_match("/\.(\d+)/",$num,$m)) $frac = $m[1];
    $wfrac = "";
    for($i=0;$i<strlen($frac);$i++)
        $wfrac .= ($wfrac ? " " : "").$digits[substr($frac,$i,1)];
    return ($is_neg ? "minus " : "").$wint.($wfrac ? "koma $wfrac" : "");
}
// contoh demo: hapus raw/ pada URL ini untuk melihat hasilnya
echo terbilang(-125.75);