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<?php class Foo { const INDEX = 1; public $array = array(self::INDEX => 'a', 'b', 'c'); } var_dump((new Foo)->array);
Output for git.master, git.master_jit, rfc.property-hooks
array(3) { [1]=> string(1) "a" [2]=> string(1) "b" [3]=> string(1) "c" }

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