array_multisort()のパラメータ1にnullが混ざった配列を渡すと駄目みたい。
NG
$sortKeys = ["a","b","c","d",null,"e","f"];
array_multisort($sortKeys, SORT_DESC, $arr);
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array_multisort(): Array sizes are inconsistent
Last updated at Posted at 2022-06-30
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