array_filter(): by-ref parameter in callback

array_filter(): by-ref parameter in callback View as Markdown

9 years ago by Christoph M. Becker — view source — reply

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Hi!

There's a patch by Jesse Donat in PhDOE which suggest to add the
following info to the array_filter() man page:

| As of PHP7 the value of the callback may no longer be used by
| reference.

Actually, it seems that declaring the callback parameter by-ref is
allowed (i.e. doesn't raise a notice or warning), but assignments to the
parameter are silently ignored as of PHP 7.0.0, see
https://3v4l.org/T0fvi.

I have not been able to find any info about this in UPGRADING, so I
wonder whether this behavioral change was intentional, and which other
functions are affected as well.

--
Christoph M. Becker