如何在php中多维数组中加倍数组

Question

我想在多维数组中乘以数量值，并根据数量得到结果

这是数组：

$meal_plan[$res['week']][$res2['day']][$res3['meal_plan_type']][$res3['quantity']][]=$res4;

这是循环：

foreach ($meal_plan as $week => $dayArr) {
            foreach ($dayArr as $day => $meatTypeArr) {
                $tFat = $tCal = $tKJoules = $tCarb  = $tProt =0;  

                foreach ($meatTypeArr as $mealType => $meals) {
                     foreach ($meals as $mealQuantity => $mealq) {  //quantity loop
                    foreach ($mealq as $meal_id => $meal) {

                        $tFat += $meal['total_fat'];
                        $tCal += $meal['calories'] ;
                        $tKJoules += $meal['kilojoules'] ;
                        $tCarb += $meal['carbs'] ;
                        $tProt += $meal['protien'] ;    
                    }

                }
            }
}

这是我的数组，我想将cabs / protein / fat等的值乘以数量数组。怎么做 ？

Array
(
    [1] => Array
        (
            [1] => Array
                (
                    [Breakfast] => Array
                        (
                            [3] => Array
                                (
                                    [0] => Array
                                        (
                                            [recepy_id] => 451
                                            [recepy_name] => Egg Omelette
                                            [meal_id] => 1
                                            [total_fat] => 17.7
                                            [calories] => 315
                                            [kilojoules] => 1310
                                            [carbs] => 18.6
                                            [protien] => 18
                                        )
                                )
                        )

                    [Lunch] => Array
                        (
                            [2] => Array
                                (
                                    [0] => Array
                                        (
                                            [recepy_id] => 1016
                                            [recepy_name] => Reduced Fat Milk
                                            [meal_id] => 4
                                            [total_fat] => 3
                                            [calories] => 127
                                            [kilojoules] => 530
                                            [carbs] => 15.25
                                            [protien] => 10
                                        )
                                )

                            [1] => Array
                                (
                                    [0] => Array
                                        (
                                            [recepy_id] => 639
                                            [recepy_name] => Custard - Egg
                                            [meal_id] => 4
                                            [total_fat] => 5.2
                                            [calories] => 82
                                            [kilojoules] => 344
                                            [carbs] => 1.7
                                            [protien] => 6
                                        )
                                )

                            [4] => Array
                                (
                                    [0] => Array
                                        (
                                            [recepy_id] => 1026
                                            [recepy_name] => Beef Waldorf Salad
                                            [meal_id] => 2
                                            [total_fat] => 11
                                            [calories] => 288
                                            [kilojoules] => 1202
                                            [carbs] => 28
                                            [protien] => 19
                                        )
                                )
                        )

                    [Snack] => Array
                        (
                            [1] => Array
                                (
                                    [0] => Array
                                        (
                                            [recepy_id] => 997
                                            [recepy_name] => Avocado -  60g
                                            [meal_id] => 4
                                            [total_fat] => 13
                                            [calories] => 125
                                            [kilojoules] => 522
                                            [carbs] => 0.3
                                            [protien] => 1
                                        )
                                )
                        )   
                )    
        )    
)

Answer 1

从您的代码中，您似乎每天需要单独的总计。那么你会这样做：

foreach ($meal_plan as $week => $dayArr) {
    foreach ($dayArr as $day => $meatTypeArr) {
        $tFat = $tCal = $tKJoules = $tCarb  = $tProt = 0;  
        foreach ($meatTypeArr as $mealType => $meals) {
            foreach ($meals as $mealQuantity => $mealq) {  //quantity loop
                foreach ($mealq as $meal_id => $meal) {
                    // Multiply each with $mealQuantity:
                    $tFat += $mealQuantity * $meal['total_fat'];
                    $tCal += $mealQuantity * $meal['calories'] ;
                    $tKJoules += $mealQuantity * $meal['kilojoules'] ;
                    $tCarb += $mealQuantity * $meal['carbs'] ;
                    $tProt += $mealQuantity * $meal['protien'] ;    
                }
            }
        }
        // Add to result array (a set of totals per day)
        $result[$week][$day] = [
            "total_fat" => $tFat,
            "calories" => $tCal,
            "kilojoules" => $tKJoules,
            "carbs" => $tCarb,
            "protein" => $tProt
        ];
    }
}

在eval.in上看到它。