On 15.05.2017 at 17:49, Remi Collet:
>> I suggest not to set unmatched subpatterns at all,
>
> Can you give an example of expected output ?
> (I think stable position for matched pattern is important)
>
> php -r 'var_dump(preg_match("/(a)?([a-z]*)(\d*)/", "123", $matches),
> $matches);'
See the pcretest results danielklein posted in his last comment on
<https://bugs.php.net/61780>. Basically, instead of assigning NULL as
values, the array indexes could be skipped, so that array_key_exists()
can be used to determine whether a certain subpattern matched or not.
--
Christoph M. Becker
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