Assigning to array with list has changed in PHP 7.

[frankdejonge]

I'd recommend to alter the recommendation to always sort by key rather than an array_reverse.

Example: https://3v4l.org/scmZ8

[dseguy]

Dag, Frank.

Yes, ksort is good too, especially with array appending ($b[], $b[], ...).

array_reverse + the 2nd parameter set to True (preserve keys) is also good.
I'll mention explicitely the 2nd parameter of array_reverse, and ksort.
That will be better.