In this tutorial, we'll make number format like 0001, 0002, 0003 in stead of 1, 2 ,3. It's very easy to do this. Look at script, we use "printf" in stead of "echo" and ("%04d", $num) This mean show number in 4 digit. You can change number in any digits as you want by replce "4" in "%04d" with number of digit you want.
Overview
For testing this code in this tutorial, we create 1 file
1. number_format.php
When you code php mail function you can't test it on your localhost you have to upload and test it on your hosting but now you can test php mail function on your localhost using Argosft mail server.
