Edit report at https://bugs.php.net/bug.php?id=78101&edit=1
ID: 78101
Updated by: nikic@php.net
Reported by: mishamosher at gmail dot com
Summary: Incorrect behaviour for substr on Windows
Status: Open
Type: Bug
Package: opcache
Operating System: Windows 10 1903 64-bits
PHP Version: 7.2.19
Block user comment: N
Private report: N
New Comment:
I want to check back whether this issue still exists in PHP 7.2.20. The 7.2.19 release had some
serious issues with opcache and it may be that this is a side-effect of the same problems.
Previous Comments:
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[2019-06-04 21:59:49] cmb@php.net
Related To: Bug #78106
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[2019-06-04 17:59:21] mishamosher at gmail dot com
Hello cmb@php.net,
Results with OPCache on:
string(6) "2f6573" string(2) "ff"
Results with OPCache off:
string(6) "2f6573" string(2) "2f"
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[2019-06-04 09:02:49] cmb@php.net
Please run the following variation of your script, and report the
results:
<?php
$in = "/es";
$out = substr($in, 0, 1);
var_dump(bin2hex($in), bin2hex($out));
?>
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[2019-06-04 01:56:44] requinix@php.net
If removing opcache makes your problem go away then this may be a bug after all.
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[2019-06-04 01:00:35] mishamosher at gmail dot com
Hello subjective@php.net,
Are your results from running the script with PHP as an Apache module?
I've thoroughly tried over and over again, and no matter what, I always get the wrong results.
var_dump reports <<string(3) "/es">>.
I've been able to pin-point the issue to the OPCache extension. If I simply remove
"zend_extension=opcache" from php.ini, everything works as it should.
Please note that I'm experiencing this issue only with PHP 7.2.19 when it is working as an
Apache module.
I can use PHP 7.2.11, 5.6.40, 7.3.6, etc., with OPCache enabled and everything works OK in there.
As a final note, what can I do to 'ring' attention to an existing filed bug? It is about
this one: https://bugs.php.net/bug.php?id=77014
- at least to know if it is a bug or intended behaviour.
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