如何在第一天的日期再次从1开始自动增量和重启？

Question

I want make auto increment by using php but when date start from 01 or my table is empty it's number restart to 1 again this is my number :

$day = date('t');
$month = date('n');
$years = date('Y');
$num = 001/$month/$years

and I was convert a number

$cut = (int)substr($num,2,1);

and then I dont know how to increase the number and go back to 1 again when date start from 01

thankyou for answering and spent your time for answer my newbie post

Answer 1

Try PHP explode :-

<?php
$num = '001/$month/$years';
$num=explode("/",$num);
$cut = (int)$num[0];
echo ++$cut;
?>