Question

I am having mathematics oriented question.Here i like to get the all possible combinations
and looking to store in array.

For example:-

1 digit = 10 (0,1,2,3,....9) 
2 digit = 100 (00,01,02,03,...)

I am having formula to find number of possibilities i.e 10^n -1.But i don’t know how can i get the values.

function get_combinations(5){
//10^5 -1 = 99999 values 

} 

the function result should be

00000,00001,00010,00100,….

in array

not like

0,1,2,….00,01,03,…99999

EDIT

I also like to mix some alphabets with the number

results like

0000a,000a1,000z1,00001,00000,….

Thanks in advance

Answer 1

$n = ???;
$array = range(0, pow(10, $n)-1);

---

yes, there is no integer start with zero

so, dun bother to construct an array start with leading zero,
when you need to output str_pad can be applied

---

function get_combinations($n)
{
  return range(0, pow(10, $n)-1);
}

$array = get_combinations(5);
$pad   = strlen(max($array));

// to output
echo str_pad($array[0], $pad, 0, STR_PAD_LEFT);