How to change all front decimal to 0 in php

Question

I have some data from database like this :

43966.31875

how to change 43966 to 0 and keep decimal number to 31875, What should I do?

well, for the final result like this :

0.31875

If my explanation is incomprehensible, I apologize, and you can ask me again, Thank You

sorry, why is the result of my data 0? I have made it as you said — ProLuck, May 15 '20 at 08:45
Can you share a bit more details? Like what the data is (e.g. a `var_dump` of the value), what you tried, and what you're getting — apokryfos, May 15 '20 at 08:47
sorry, I made a little mistake, what you said is working for me, but why the result is `0.31874999999854`, should the result is `0.31875` — ProLuck, May 15 '20 at 08:51
Take a look at https://stackoverflow.com/questions/588004/is-floating-point-math-broken — apokryfos, May 15 '20 at 08:56
Try this. This is exactly what you needed $number = 43966.31875; $result = floatval(strrchr($number, ".")); echo $result; — Mukti Rani Ghosh, May 15 '20 at 09:33

Huy Trịnh · Accepted Answer · 2020-05-15T08:58:40.207

2

The regex method:

$string = '43966.31875';
echo preg_replace('/(\d+).(\d+)/i', '0.${2}', $string);

Will split number into 2 parts then replace the part 1 with "0."

The strstr method:

$string = '43966.31875';
echo '0'.strstr($string, '.');

Also split the number into 2 parts and take the second part and add "0" before

edited May 15 '20 at 08:58

answered May 15 '20 at 08:49

Huy Trịnh

733
3
11

the result is not return to `0.31875` but the result is `0.31874999999854`, I still confused why my result return to `0.31874999999854` and not return to `0.31875` :( – ProLuck May 15 '20 at 08:53
I updated my answer, please try regex method @LuckALip – Huy Trịnh May 15 '20 at 08:54
Also update strstr function method – Huy Trịnh May 15 '20 at 08:56
okay I will try what you said, thanks to help me – ProLuck May 15 '20 at 08:57
Let us [continue this discussion in chat](https://chat.stackoverflow.com/rooms/213915/discussion-between-luckalip-and-huy-trnh). – ProLuck May 15 '20 at 09:33

Harish ST · Answer 2 · 2020-05-15T10:43:12.270

1


$number = 43966.31875;
$decimalPart = fmod($number, 1);

$decimalCount = explode('.', $number)[1];
$result = round($decimalPart, strlen($decimalCount));

Refer the Official Documentation: PHP fmod

edited May 15 '20 at 10:43

answered May 15 '20 at 09:01

Harish ST

1,475
9
23

This will return **0.31874999999854** – Huy Trịnh May 15 '20 at 09:11

How to change all front decimal to 0 in php

2 Answers2