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<?php $a = [ ['a', 'b', 'c'], [1, 2, 3], ['foo', 'bar', 'baz'], ]; var_dump(array_column($a, 0));
Output for git.master, git.master_jit, rfc.property-hooks
array(3) { [0]=> string(1) "a" [1]=> int(1) [2]=> string(3) "foo" }

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