PHP number format 4 digits

Question

For example, I have this format: $s_number = "12"; And for this input, I need 0012 as the output:

Another example:

Input $s_number = "3"; Output: 0003

Every time I need 4 digits I would like this to happen.

`printf` can already do this: `printf("%04d", $number)`. There's also `sprintf` if you want the result in a string. — Jon, Mar 05 '13 at 21:23
What have you tried? Did you try using something like sprintf (http://www.php.net/manual/en/function.sprintf.php) or just prepending text based on the length of the string? — Mike, Mar 05 '13 at 21:23

score 16 · Answer 1 · answered Mar 05 '13 at 21:26

16

It won't be a number (but a string), but you can do that using str_pad. In your examples:

$s_number = str_pad( "12", 4, "0", STR_PAD_LEFT );
$s_number = str_pad( "3", 4, "0", STR_PAD_LEFT );

answered Mar 05 '13 at 21:26

Vivienne

score 14 · Answer 2 · answered Mar 05 '13 at 21:26

14

Use str_pad() for that:

echo str_pad($number, 4, '0', STR_PAD_LEFT);

answered Mar 05 '13 at 21:26

hek2mgl

1

Thank you, also I have succes with this $p = substr(sprintf('%04d', $digit),0,4); – Martelo2302 Mar 05 '13 at 21:29
Note that str_pad is **much** faster ;) – hek2mgl Mar 05 '13 at 21:30

score 2 · Answer 3 · answered Mar 05 '13 at 21:26

2

You can achieve this easily by using phps' printf

<?php
$s_number = '12';
printf("%04d", $s_number);
?>

Hope this helps

answered Mar 05 '13 at 21:26

Mic1780

ah thanks. Totally forgot they printf also prints it out (stupid of me cus it is also in the name of the function) – Mic1780 Mar 05 '13 at 21:29

3 Answers3