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Date: Fri, 14 Jun 2019 19:15:07 +0200
Message-ID: <CAG9XoMThqtVYLRo7QscexKZ2os2etBEtSuUQfBzv3pzzdteZAw@mail.gmail.com>
To: PHP Internals <internals@lists.php.net>
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Subject: Allow zero parameters in array_merge()?
From: benjamin.morel@gmail.com (Benjamin Morel)

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Hi Internals,

I'm wondering if there's any reason why array_merge() doesn't allow zero
arrays to be passed?

    array_merge(); // Warning:  array_merge() expects at least 1 parameter,
0 given

It would be reasonable IMO to return an empty array in this case. The
reason is, I'm often using it this way:

    $result = [];

    foreach (...) {
        $result[] = getSomeListOfItems();
    }

    if (! $result) {
        return [];
    }

    return array_merge(...$result);

If we allowed zero arrays to be passed, I could get rid of this repeated
empty array check before array_merge().

Ben

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