<?php
$numberHome = 36;
houseCheck($numberHome);
function houseCheck($numberHome){
    $floor = 9;
$floorapartments = 4;
    $entranceApartments = $floor * $floorapartments;
    $checkentrance = ($numberHome / $entranceApartments)+1;
    $checkFloor = ($numberHome / $floorapartments) +1;
    $check = (($numberHome % $entranceApartments) / $floorapartments)+1;
    if ($numberHome < 0) {
        echo "Номера квартиры ".$numberHome." не существует ";
        return false;
    }
        if ($checkentrance <= $numberHome ){
            if ($checkFloor <= $numberHome){
            echo "Ваша квартира ".$numberHome." у вас ".((int)$checkentrance)." подьезд ".((int)$check)." этаж";
        }
    }
}