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Output for 8.1.0 - 8.1.32, 8.2.0 - 8.2.28, 8.3.0 - 8.3.19, 8.4.1 - 8.4.5
array ( 0 => '31', 1 => '32', 2 => array ( 0 => 'foo', 1 => array ( 0 => 'bar', ), ), 3 => '33', 4 => '34', 5 => array ( 0 => '341', 1 => '342', 2 => '343', 3 => '344', 4 => array ( 0 => '3441', 1 => '3442', 2 => '3443', 3 => '3444', ), ), )

preferences:
77.26 ms | 412 KiB | 5 Q