PHP

php add 0 before number

$number = 4;
str_pad($number, 2, '0', STR_PAD_LEFT); // returns 04

$number = 14;
str_pad($number, 2, '0', STR_PAD_LEFT); // returns 14

prepend 0 to number php

str_pad($month, 2, '0', STR_PAD_LEFT);