<?php $items = Array ( 'Oranges' => Array ( 'Name' => 'Oranges', 'l.VA123' => 17, 'l.MA123' => 12, 'l.GA123' => 9, 'l.CT123' => 5, ), 'Apple' => Array ( 'Name' => 'Apple', 'l.CA123' => 13, ), 'Grapes' => Array ( 'Name' => 'Grapes', 'l.WI123' => 8, 'l.FL123' => 5, ), ); // known keys $keys = [ 'l.VA123' => 0, 'l.MA123' => 0, 'l.GA123' => 0, 'l.CT123' => 0, 'l.CA123' => 0, 'l.WI123' => 0, 'l.FL123' => 0, ]; foreach ($items as &$row) { $row = array_replace($keys, $row); } var_export($items);
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