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Output for 8.1.32, 8.2.0 - 8.2.28, 8.3.0 - 8.3.19, 8.4.1 - 8.4.5
array ( 0 => array ( 0 => 12, 1 => 14, ), 5 => array ( 0 => 10, 1 => NULL, ), 7 => array ( 0 => NULL, 1 => 9, ), 12 => array ( 0 => NULL, 1 => 11, ), 19 => array ( 0 => 48, 1 => 30, ), )

preferences:
56.68 ms | 411 KiB | 5 Q