PHP adding zeros to numbers

Question

Im trying to generate barcode and i need it to be in 20 numbers. Barcode requires that reference must be in 20 numbers.

So if my reference is 67585 its must be 20 numbers like that 00000000000000067585

And if reference is 489382995463342 Barcode number must be in 20 numbers like 00000489382995463342

I tried this code but it's not working properly

str_pad(str_replace('', '',$reference), 20, '0', STR_PAD_LEFT);

why it's not working? apart from the useless str_replace, it looks fine — STT LCU, Dec 04 '13 at 11:17
I tested this and it works. Like the previous commenter says, not sure what the str_replace is for. — Drumbeg, Dec 04 '13 at 11:19
Are you sure it doesn't work? What gives str_pad back on your server? — Maarkoize, Dec 04 '13 at 11:22

score 1 · Accepted Answer · answered Dec 04 '13 at 11:16

1

Try this-

str_pad($reference, 20, '0', STR_PAD_LEFT);

OR,

sprintf('%20d', $reference);

answered Dec 04 '13 at 11:16

Sahil Mittal

20,697
12
65
90

score 1 · Answer 2 · answered Dec 04 '13 at 11:19

It seems fine (see http://3v4l.org/UKBqS), how are you viewing/inspecting the final value?

<?php
if ( ! defined('PHP_EOL')) {
    define('PHP_EOL', "\n");
}

foreach (array('67585', '489382995463342') as $test) {
    echo str_pad($test, 20, '0', STR_PAD_LEFT), PHP_EOL;
}

score 1 · Answer 3 · edited May 23 '17 at 12:13

1

use sprintf

Docs Link for sprintf function.

http://php.net/manual/en/function.sprintf.php

<?php
$num = 4;
$num_padded = sprintf("%02s", $num);
echo $num_padded; // returns 04
?>

PHP prepend leading zero before single digit number, on-the-fly

edited May 23 '17 at 12:13

Community

1
1

answered Dec 04 '13 at 11:19

Maz I

3,664
2
23
38

PHP adding zeros to numbers

3 Answers3