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<?php $one = [1]; $two = [42]; $arr_1 = ['k' => &$one]; $arr_2 = ['k' => &$two]; var_dump(current($arr1['k']), current($arr2['k'])); array_replace_recursive($arr1, $arr2); var_dump(current($arr1['k']), current($arr2['k']));
Output for git.master, git.master_jit
Warning: Undefined variable $arr1 in /in/FYj3Y on line 8 Warning: Trying to access array offset on value of type null in /in/FYj3Y on line 8 Fatal error: Uncaught TypeError: current(): Argument #1 ($array) must be of type array, null given in /in/FYj3Y:8 Stack trace: #0 /in/FYj3Y(8): current(NULL) #1 {main} thrown in /in/FYj3Y on line 8
Process exited with code 255.
Output for rfc.property-hooks
Warning: Undefined variable $arr1 in /in/FYj3Y on line 8 Warning: Trying to access array offset on null in /in/FYj3Y on line 8 Fatal error: Uncaught TypeError: current(): Argument #1 ($array) must be of type array, null given in /in/FYj3Y:8 Stack trace: #0 /in/FYj3Y(8): current(NULL) #1 {main} thrown in /in/FYj3Y on line 8
Process exited with code 255.

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