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<?php $array = [ 'visitPoints'=>[ 20=>[2,5,6,8,10,11], 35=>[2,5,6], 57=>[1] ], 'islands'=>[ 20=>[5,10,11], 35=>[5,6] ], 'animals'=>[ 20=>[5,11], 35=>[] ] ]; $result = [ 20=>[5,11], 35=>[], 57=>[] ]; print_r($result);
Output for git.master_jit, git.master, rfc.property-hooks
Array ( [20] => Array ( [0] => 5 [1] => 11 ) [35] => Array ( ) [57] => Array ( ) )

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