> Le 29 mars 2022 à 21:44, Rowan Tommins <rowan.coll...@gmail.com> a écrit :
>
> Hi all,
>
> If $foo is not defined, statements such as $foo += 1 and $foo .= 'blah' raise
> "undefined variable" Warnings in PHP 8, and will throw Errors in PHP 9.
> However, the very similar looking $foo[] = 1 succeeds silently.
>
> This seems odd to me, as "append to string" and "append to array" seem like
> very similar operations, with most of the same use cases and possible bugs.
>
>
Hi,
There are various subcases to consider:
(1) $x[] = 42; and $x['y'] = 42; where $x is undefined
(2) $x[] = 42; and $x['y'] = 42; where $x is null
(3) $x['y'][] = 42; and $x['y']['w'] = 42; where $x is an array, and $x['y']
is undefined.
Of course, I agree that (1) should be an error.
The case (3) is similar to (1), but I think it is more controversial to change.
I bet that they are various places in my code that take advantage of that
feature, although personally I don’t mind to write $x['y'] ??= [ ]; when needed.
—Claude
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