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<?php $arr = ['0' => 'foo', '1' => 'bar']; // - keys will be dumped as integers // - \array_list($arr) will return true \var_dump($arr, \array_is_list($arr)); $arr['03'] = 'baz'; // - only the new key will be quoted as a string // - \array_list($arr) will return false \var_dump($arr, \array_is_list($arr));
Output for 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
array(2) { [0]=> string(3) "foo" [1]=> string(3) "bar" } bool(true) array(3) { [0]=> string(3) "foo" [1]=> string(3) "bar" ["03"]=> string(3) "baz" } bool(false)
preferences:
64.93 ms | 406 KiB | 5 Q