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<?php $array = [ 0 => [ "label" => "Radiator", "details" => [[ "label" => "Condition", "value" => "New", ], [ "label" => "Type", "value" => "Wall", ]], ], 1 => [ "label" => "Airco", "details" => [[ "label" => "Condition", "value" => "New", ], [ "label" => "Type", "value" => "", ]], ], 2 => [ "label" => "Refrigerator", "details" => [[ "label" => "Condition", "value" => "Bad", ], [ "label" => "Type", "value" => "Wall", ]], ], ]; foreach($array as &$row){ foreach($row['details'] as $key => $record){ if(strlen($record['value']) == 0){ unset($row['details'][$key]); } } } print_r($array);

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