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<?php $arrVal = array ( '22' => array( '0' => 60, '29' => array( '0' => 6 ), '30' => array ( '0' => 5, '1' => 8 ), '31' => array ( '0' => 7, '1' => 9, '2' => 14, '3' => 26 ) ), '23' => 12, '35' => 10, '42' => 22 ); print_r($arrVal);
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Array ( [22] => Array ( [0] => 60 [29] => Array ( [0] => 6 ) [30] => Array ( [0] => 5 [1] => 8 ) [31] => Array ( [0] => 7 [1] => 9 [2] => 14 [3] => 26 ) ) [23] => 12 [35] => 10 [42] => 22 )

preferences:
231.37 ms | 406 KiB | 307 Q