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<?php $r = [ '123' => "1", 'W' => "123", ]; var_dump($r); print_r($r['W']); $r['W'] = '999'; var_dump($r); print_r($r['W']);
Output for git.master, git.master_jit, rfc.property-hooks
array(2) { [123]=> string(1) "1" ["W"]=> string(3) "123" } Warning: Undefined array key "W" in /in/oWS6G on line 9 array(3) { [123]=> string(1) "1" ["W"]=> string(3) "123" ["W"]=> string(3) "999" } 999

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