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<?php $array = []; $array["01000"] = "Bourg-en-Bresse"; $array["75001"] = "Paris"; var_dump($array);
Output for 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
array(2) { ["01000"]=> string(15) "Bourg-en-Bresse" [75001]=> string(5) "Paris" }

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41.77 ms | 847 KiB | 4 Q