php range_leading_zero

range_leading_zero.php

<?php
error_reporting(E_ALL);
ini_set('display_errors', '1');
function range_leading_zero($start,$end,$size, $step=1){
	$arr = range($start,$end,$step);
	$filtered_arr = array_map(function($digit) use ($size) {return sprintf("%0".$size."d", $digit);},$arr);
	//var_export($filtered_arr);
	return array_unique(array_merge($arr, $filtered_arr));
}

var_export(range_leading_zero(1,12,2));