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<?php $arr = [1,2,3]; function byvalue($arg) { $arr[0] = 10; } byvalue($arg); var_dump($arr); // no change call_user_func_array('byvalue', [&$arg]); var_dump($arr); // no change
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined variable $arg in /in/KHB3m on line 6 array(3) { [0]=> int(1) [1]=> int(2) [2]=> int(3) } array(3) { [0]=> int(1) [1]=> int(2) [2]=> int(3) }

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