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<?php $keys = array('foo', 5, 10, 'bar'); $a = array_fill_keys($keys, array(1,2,3,4)); print_r($a);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [foo] => Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 ) [5] => Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 ) [10] => Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 ) [bar] => Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 ) )

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