zerofill a integer php

Question

How would I go about 'zero filling' an integer?

ie

1 becomes 0001
40 becomes 0040
174 becomes 0174

http://stackoverflow.com/questions/1431240/how-to-count-with-0 — raspi, Sep 18 '09 at 19:53

score 86 · Accepted Answer · answered Sep 18 '09 at 10:05

86

$filled_int = sprintf("%04d", $your_int)

answered Sep 18 '09 at 10:05

Palantir

2

If you want to Zero Pad for 15 digits, should be like this: $filled_int = sprintf("%015d", $your_int) – Nuri Akman Nov 29 '18 at 08:21

Joe · Answer 2 · 2009-09-18T10:29:36.093

25

$number = 12;
$width = 4;
$padded = str_pad((string)$number, $width, "0", STR_PAD_LEFT);

edited Sep 18 '09 at 10:29

answered Sep 18 '09 at 10:05

Joe

1

This pads to the right of the number, and pads with spaces not zeros. $padded = str_pad($number, $width, 0, STR_PAD_LEFT); – Tom Haigh Sep 18 '09 at 10:09
Yeah, ommission on my part. Corrected. But I would retain some semblance of type safety by providing appropriate types (even if conversion is automatic). – Joe Sep 18 '09 at 10:32
2

Depending on the scenario, I'd say this is usually the better solution. Additionally, it is not currently necessary to explicitly cast to `string` unless you use a numeric literal in `str_pad`. A variable of a numeric type will be implicitly cast. – Jack Henahan Mar 16 '14 at 22:28

2 Answers2