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<?php class x { const LABELS = [ 'a' => 'Hello', 'b' => 'World' ]; const UNKNOWN_LABEL = 'unknown'; public static function test($module) { return self::LABELS[$module] ?? self::UNKNOWN_LABEL; } } $a = []; $a[] = x::test('a'); $a[] = x::test('b'); $a[] = x::test('c'); $a[] = x::test(null); var_dump($a);
Output for git.master_jit, git.master
Deprecated: Using null as an array offset is deprecated, use an empty string instead in /in/msg5M on line 13 array(4) { [0]=> string(5) "Hello" [1]=> string(5) "World" [2]=> string(7) "unknown" [3]=> string(7) "unknown" }
Output for rfc.property-hooks
array(4) { [0]=> string(5) "Hello" [1]=> string(5) "World" [2]=> string(7) "unknown" [3]=> string(7) "unknown" }

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