CODEWITHSUNDEEP
phparraysmultidimensional-arraymerging-data
Tim Hef
Tim Hef

Reputation: 83

Add a new column value to each row of a 2d array from related values in a flat array

So I have the following two arrays which I try to merge together, the first one as $weekDays:

Array
(
[0] => Array
    (
        [id] => 1
        [start] => 11:00:00
        [end] => 17:00:00
    )

[1] => Array
    (
        [id] => 2
        [start] => 09:00:00
        [end] => 17:00:00
    )

[2] => Array
    (
        [id] => 3
        [start] => 09:00:00
        [end] => 17:00:00
    )

[3] => Array
    (
        [id] => 5
        [start] => 09:00:00
        [end] => 17:00:00
    )

[4] => Array
    (
        [id] => 6
        [start] => 09:00:00
        [end] => 17:00:00
    )

[5] => Array
    (
        [id] => 7
        [start] => 09:00:00
        [end] => 17:00:00
    )

[6] => Array
    (
        [id] => 8
        [start] => 09:00:00
        [end] => 17:00:00
    )

)

And the second array as $all_slots:

Array
(
    [0] => 0
    [1] => 0
    [2] => 2
    [3] => 0
    [4] => 0
    [5] => 0
    [6] => 0
    [7] => 0
)

Using this foreach, I try to loop each $weekDays item and merge it with an $all_slots item which has te same index number:

foreach($weekDays as $index => $day){
        $slot = ['slot' => $all_slots[$index]];
        array_merge_recursive($slot, $day);
    }

But when I echo the updated $weekDays array it hasn't been merged at all, no errors either. It really does nothing for some reason, what am I missing here? I try to have the following result for the $weekDays array:

Array
(
[0] => Array
    (
        [id] => 1
        [start] => 11:00:00
        [end] => 17:00:00
        [slot] => 0
    )

[1] => Array
    (
        [id] => 2
        [start] => 09:00:00
        [end] => 17:00:00
        [slot] => 0
    )

[2] => Array
    (
        [id] => 3
        [start] => 09:00:00
        [end] => 17:00:00
        [slot] => 2
    )

[3] => Array
    (
        [id] => 5
        [start] => 09:00:00
        [end] => 17:00:00
        [slot] => 0
    )

[4] => Array
    (
        [id] => 6
        [start] => 09:00:00
        [end] => 17:00:00
        [slot] => 0
    )

[5] => Array
    (
        [id] => 7
        [start] => 09:00:00
        [end] => 17:00:00
        [slot] => 0
    )

[6] => Array
    (
        [id] => 8
        [start] => 09:00:00
        [end] => 17:00:00
        [slot] => 0
    )

)

Upvotes: 0

Views: 53

Answers (1)

RiggsFolly
RiggsFolly

Reputation: 94662

array_merge_recursive() returns a resulting array which you are not capturing.

A simpler approach would be

foreach($weekDays as $index => &$day){
    $day['slot'] = $all_slots[$index];
}

you will have to make sure that the $all_slots array has the same or a greater number of occurances as weekDays

Upvotes: 2

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