<?php $array = [ 0 => [ "date" => "01-06-2018", "nav" => "30.65100"], 1 => [ "date" => "01-06-2018", "nav" => "30.65100"], 2 => [ "date" => "01-06-2018", "nav" => "30.65100"], 3 => [ "date" =>"01-06-2018", "nav" => "30.65100"] ]; array_walk($array, function(&$item1) { $item1['id_code'] = "0089"; }); print_r($array);
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