Json string bepaalde dingen samen tellen.

Array
(
    [code] => Array
        (
            [0] => 8191
            [1] => milieu
        )


    [naam] => Array
        (
            [0] => Arcal 1 PG - 4,3 m³
            [1] => Bijdrage veiligheid en milieu
        )


    [opmerking] => Array
        (
            [0] => 
            [1] => Afgehaald op 28-04-2015
        )


    [vol] => Array
        (
            [0] => 3
            [1] => 3
        )


    [leeg] => Array
        (
            [0] => 3
            [1] => 0
        )


    [inhoud] => Array
        (
            [0] => 4.3
            [1] => 1
        )


    [eenheid] => Array
        (
            [0] => 9.55
            [1] => 7.42
        )


    [totaal] => Array
        (
            [0] => 123.20
            [1] => 22.26
        )


)


Array
(
    [code] => Array
        (
            [0] => 8191
            [1] => milieu
        )


    [naam] => Array
        (
            [0] => Arcal 1 PG - 4,3 m³
            [1] => Bijdrage veiligheid en milieu
        )


    [opmerking] => Array
        (
            [0] => 
            [1] => Afgehaald op 02-06-2015
        )


    [vol] => Array
        (
            [0] => 2
            [1] => 2
        )


    [leeg] => Array
        (
            [0] => 2
            [1] => 0
        )


    [inhoud] => Array
        (
            [0] => 4.3
            [1] => 1
        )


    [eenheid] => Array
        (
            [0] => 9.55
            [1] => 7.42
        )


    [totaal] => Array
        (
            [0] => 82.13
            [1] => 14.84
        )


)

$testarray = [];


foreach($test as $val)
{	
	$producten = json_decode($val['fData'], true);		
	foreach($producten['data']['factuur']['code'] as $key => $value)
	{
		if(!empty($producten['data']['factuur']['code'][$key]) && !empty($producten['data']['factuur']['naam'][$key])
			&& $producten['data']['factuur']['code'][$key] != 'TEKST' && $producten['data']['factuur']['code'][$key] != 'tekst'
			&& $producten['data']['factuur']['code'][$key] != 'bbq')
		{
			$testarray[] = array(
				'code' => $producten['data']['factuur']['code'][$key], 
				'naam' => $producten['data']['factuur']['naam'][$key], 
				'aantal' => $producten['data']['factuur']['vol'][$key],
				'totaalPrijs' => $producten['data']['factuur']['totaal'][$key]
			);
		}
	}
}




$maak = [];
$prijsTotaal = [];
$totaalFlessen = [];
$NaamFlessen = [];


foreach ($testarray as $row) 
{
    $totaalFlessen[$row['code']] = isset($totaalFlessen[$row['code']]) ? $totaalFlessen[$row['code']] : 0;	
    $prijsTotaal[$row['code']] = isset($prijsTotaal[$row['code']]) ? $prijsTotaal[$row['code']] : 0;


    $maak[$row['code']][$row['code']] = $row;
    $NaamFlessen[$row['code']] = $row['naam'];
	$totaalFlessen[$row['code']]  += $row['aantal'];
    $prijsTotaal[$row['code']] += $row['totaalPrijs'];
}