On December 12, 2017 7:38:54 AM GMT+01:00, Stanislav Malyshev
<smalys...@gmail.com> wrote:
>Hi!
>
>> I would rather discourage usage of references. Since PHP 7 the cost
>of
>> breaking cow isn't as expensive anymore, but receiving values by
>value
>> and returning by value is more idiomatic imo. Using objects can be
>more
>> efficient.
>
>Objects are kind of overkill when you just need a modifyable array. And
>copying an array when you just need to add one value to a K-size array
>is still not a good idea for many apps. O(n) vs O(n^2) still matters.
>One should definitely be careful not to overuse refs, but there are
>still valid cases for using them.
The issue, as you well know, is that references disable copy-on-write. Thus
assume you have code like this:
function with_ref(&$a) {
count ($a);
}
function no_ref($a) {
count($a);
}
The count in with_ref() will copy the array, while no_ref() can use copy on
write and won't actually copy.
johannes
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