<?php

function russian_text($koll = 0, $words = 0) { 

    if ($koll < 11 or $koll > 19) { 

        $koll = (string )$koll; 

        switch ($koll{mb_strlen($koll) - 1}) { 

            case 1: 

                return ($words[0]); 

                break; 

            case 2: 

            case 3: 

            case 4: 

                return ($words[1]); 

                break; 

            default: 

                return ($words[2]); 

                break; 

        } 

    } 

    else 

        return ($words[2]); 

}

?>