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<?php $prop_def['type'] = [NULL, 'string']; $type = $prop_def['type'] ?? 'null'; \var_dump($type);
Output for 8.1.0 - 8.1.31, 8.2.0 - 8.2.27, 8.3.0 - 8.3.16, 8.4.1 - 8.4.3
array(2) { [0]=> NULL [1]=> string(6) "string" }
preferences:
53.39 ms | 406 KiB | 5 Q