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<?php $result =[ ["day" => "Feb 2018", "value" => "101"], ["day" => "Jan 2018", "value" => "18"], ["day" => "Mar 2018", "value" => "0"] ]; usort($result,function($a,$b){return strtotime($a['day'])-strtotime($b['day']);}); var_export($result);

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