<?php $data = [ '2016' => [ [ "date" => "2016/01/01", "close" => 837 ], [ "date" => "2016/12/01", "close" => 769 ], ], '2015' => [ [ "date" => "2015/01/01", "close" => 637 ], [ "date" => "2015/12/01", "close" => 669 ], ], ]; echo json_encode($data, JSON_PRETTY_PRINT);
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