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Bug #75240 Remainder of $a divided by 1 is always 0
Submitted: 2017-09-21 07:32 UTC Modified: 2017-09-21 07:38 UTC
From: miami at blackcrystal dot net Assigned:
Status: Not a bug Package: Math related
PHP Version: 7.0.23 OS: Ubuntu 16.04.3
Private report: No CVE-ID: None
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From: miami at blackcrystal dot net
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 [2017-09-21 07:32 UTC] miami at blackcrystal dot net 
Description:
------------
---
From manual page: http://www.php.net/language.operators.arithmetic
---

PHP7 always returns 0 as remainder after division to 1.

<?php
echo (1 % 1; // 0, ok
echo 1.5 % 1; // 0, must be .5
echo 2.234567 % 1; // 0, must be .234567
?>

Test script:
---------------
<?php
echo (1 % 1) ."\n";
echo (1.5 % 1) ."\n";
echo (2.234567 % 1) ."\n";
?>

Expected result:
----------------
0
.5
.234567

Actual result:
--------------
0
0
0

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 [2017-09-21 07:38 UTC] requinix@php.net
-Status: Open +Status: Not a bug
 [2017-09-21 07:38 UTC] requinix@php.net 
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to report
a bug at http://bugs.php.net/how-to-report.php

> Operands of modulo are converted to integers (by stripping the decimal part)
> before processing. For floating-point modulo, see fmod().
 [2017-09-21 07:39 UTC] sjon at hortensius dot net 
The explanation is also in the documentation:

"Operands of modulo are converted to integers (by stripping the decimal part) before processing. For floating-point modulo, see fmod()."
 
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