<?php
switch ($dog['exp']) {
            case ($dog['exp'] > 0 && $dog['exp'] <= 30):
                $level = 1;
                break;

            case ($dog['exp'] >= 30 && $dog['exp'] < 60):
                $level = 2;
                break;

            case ($dog['exp'] >= 60 && $dog['exp'] < 120):
                $level = 3;
                break;

            case ($dog['exp'] >= 120 && $dog['exp'] < 240):
                $level = 4;
                break;

            case ($dog['exp'] >= 240 && $dog['exp'] < 480):
                $level = 5;
                break;

            case ($dog['exp'] >= 480 && $dog['exp'] < 960):
                $level = 6;
                break;

            case ($dog['exp'] >= 960 && $dog['exp'] < 1920):
                $level = 7;
                break;

            case ($dog['exp'] >= 1920 && $dog['exp'] < 3840):
                $level = 8;
                break;

            case ($dog['exp'] >= 3840 && $dog['exp'] < 7680):
                $level = 9;
                break;

            case ($dog['exp'] >= 7680 && $dog['exp'] < 15360):
                $level = 10;
                break;

            case ($dog['exp'] >= 15360 && $dog['exp'] < 30720):
                $level = 11;
                break;

            case ($dog['exp'] >= 30720 && $dog['exp'] < 61440):
                $level = 12;
                break;

            case ($dog['exp'] >= 61440 && $dog['exp'] < 122880):
                $level = 13;
                break;

            case ($dog['exp'] >= 122880 && $dog['exp'] < 245760):
                $level = 14;
                break;

            case ($dog['exp'] >= 245760 && $dog['exp'] < 491520):
                $level = 15;
                break;

            default:
                $level = 1;
                break;
        }