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Bug #81150 Deprecated non-integer-compatible float conversions missing from UPGRADING
Submitted: 2021-06-17 04:45 UTC Modified: 2021-06-17 05:14 UTC
From: call dot user dot func at gmail dot com Assigned:
Status: Closed Package: *General Issues
PHP Version: 8.1.0alpha1 OS: Windows 10
Private report: No CVE-ID: None
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 [2021-06-17 04:45 UTC] call dot user dot func at gmail dot com 
Description:
------------
Hi. The following code produces a deprecation warning in 8.1 alpha.
Is it used to be like this or is it a bug?
I can't find such information in the deprecation information of https://github.com/php/php-src/blob/php-8.1.0alpha1/UPGRADING


Test script:
---------------
$arr = [];
$cellValue = 159.6;
var_dump(isset($arr[$cellValue]));

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 [2021-06-17 05:06 UTC] requinix@php.net
-Summary: Deprecation: Implicit conversion from float to int with array keys +Summary: Deprecated non-integer-compatible float conversions missing from UPGRADING -Status: Open +Status: Verified
 [2021-06-17 05:06 UTC] requinix@php.net 
See https://wiki.php.net/rfc/implicit-float-int-deprecate
 [2021-06-17 05:14 UTC] call dot user dot func at gmail dot com 
Thanks for the fast response.

I never noticed that floats implicit casted to int in array keys.
This affect so many user land code, will be a hell of a job to fix that all.
PhpSpreadsheet for example throws millions of those deprecations because it uses raw cellValues as indexes of arrays.

But i see this a good change, because many, including me, will not have noticed that php does automaticy float to int cast in array keys.
As well i never really noticed that casting float to string will also result in that precision lost.

Thanks.
 [2021-06-17 07:52 UTC] git@php.net 
Automatic comment on behalf of nikic
Revision: https://github.com/php/php-src/commit/deb7955bf44cb687419582e0ea58ff259c1952d5
Log: Fix #81150 Add UPGRADING note for float to int deprecation
 [2021-06-17 07:52 UTC] git@php.net
-Status: Verified +Status: Closed
 
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