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Bug #77014 Array traversal issues PHP 7+
Submitted: 2018-10-15 15:09 UTC Modified: -
From: mishamosher at gmail dot com Assigned:
Status: Open Package: Arrays related
PHP Version: 7.2.11 OS:
Private report: No CVE-ID: None
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 [2018-10-15 15:09 UTC] mishamosher at gmail dot com
There is a different behaviour between PHP 5.x and 7.x when traversing arrays.

I can not find if this is intended, so I'm supposing its a bug.

Test script:

Expected result:
I expect the same output on PHP 5.x and 7.x.

Actual result:
The outputs differ between PHP 5.x and 7.x.


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 [2018-11-26 14:34 UTC] george dot banyard at gmail dot com
I don't think this is a bug with the array traversal but more with the copying of the array state when the function is executed.
If you reverse the order of execution as shown here:

You get the same result in PHP5.x and 7.x

Only difference that I know of is that before PHP7 foreach would use the internal pointer of the array which isn't necessary any more.

So maybe there was a pointer reset mechanism for all loops which has been removed during the transition from 5 to 7.

Also I do think the new behaviour in this case is Intended and wouldn't considered it a bug.
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