How to add a number with leading zeroes in php?

Question

Okay so I am designing a tracking software for a company. I have almost completed my software and now I realised that Bank Cheque Numbers can contain leading zeroes. Okay so for some function I need to add a certain number to this Cheque Number but I need to retain the leading zeroes. For Ex, 0701 + 2 should give me 0703 instead of 703. Also the size of the Cheque Number is not fixed so that i can add remaining digits as zero.

If it has leading zeroes, it's **not** a number (database zero-fill notwithstanding) — CD001, Jun 25 '18 at 15:55
Possible duplicate of [Formatting a number with leading zeros in PHP](https://stackoverflow.com/questions/1699958/formatting-a-number-with-leading-zeros-in-php) — dave, Jun 25 '18 at 15:55
So it's a string ... why are you trying to treat it as a number, when it isn't one? — CD001, Jun 25 '18 at 15:56
@aquaballin it's not. i already checked that thread after which I posted this question — Piyush Patil, Jun 25 '18 at 15:57
You really shouldn't need the leading zeros. The banks can figure out the details without them. — aynber, Jun 25 '18 at 15:57
use strlen to get the original length, cast to a number, compute your sum and then use str_pad ( http://www.php.net/manual/en/function.str-pad.php ) to add your leading zeros — ᴄʀᴏᴢᴇᴛ, Jun 25 '18 at 15:58
@crozet thanks for the answer I really appreciate it. Can you post it as answer so that I can mark it correct — Piyush Patil, Jun 25 '18 at 16:00

score 1 · Accepted Answer · answered Jun 25 '18 at 16:02

you have to get the length of your initial string, add your value and then use str_pad to add again your leading zeros

$initial = "0123";
$length = strlen($initial); // save the length
$result = $initial + 2; // add your value (result is 125)
$final = str_pad($result, $length, '0', STR_PAD_LEFT); // add the leading zeros to the initial length
echo $final; // will echo "0125"

score 0 · Answer 2 · answered Jun 25 '18 at 16:03

0

Use "sprintf" to give a fixed length to a number. (with leading zeros)
Try below code

<?php
$value = 701 + 3; //do your calculation

$final_value = sprintf('%04d', $value); //give a fixed length to value 

echo $final_value;

answered Jun 25 '18 at 16:03

Rumesh

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How to add a number with leading zeroes in php?

2 Answers2