Sure, PHP arrays are actually ordered maps, but it's super confusing when used as arrays. I mean, look at code like this:

    $arr = [];
    $arr[2] = "two";
    $arr[0] = "zero";
    $arr[1] = "one";
    echo join($arr, ", ");
    // two, zero, one

In any other language, the result of similar code would be "zero, one, two". You'd need to `ksort` this thing to get it to behave like a normal bog-standard boring array.

Everybody's writing PHP code pretending that it has arrays when really, it does not. The gotchas are way bigger than the gotchas in Python <3.7's unordered maps. It's a mess.