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<?php $nu_array = null; $callback = function ( $item ) use(&$nu_array) { $nu_array[] = $item; }; $array = array('a',array(1,2,3),'b',array('c',4,5,array(6,7,array(8)))); array_walk_recursive($array, $callback); print_r($nu_array); /** Array ( [0] => apple [1] => sky [2] => juice ) **/
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Array ( [0] => a [1] => 1 [2] => 2 [3] => 3 [4] => b [5] => c [6] => 4 [7] => 5 [8] => 6 [9] => 7 [10] => 8 )
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/KWvQt on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/KWvQt on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/KWvQt on line 3
Process exited with code 255.

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