Is there an alternative for array_merge?

Question

The problem is, I'm not getting the expected results of my array code.

I've tried doing the array_merge, but all it does was to merge all the arrays.

$medicine_order = $request['medicine_id'];

        array:3 [▼
          0 => "25"
          1 => "32"
          2 => "30"
      ]

      $medicine_quantity = $request['medicine_quantity'];

      array:3 [▼
          0 => "3"
          1 => "10"
          2 => "6"
      ]

      $count = 0;
      foreach ($medicine_order as $id) {
        $item = new Historyitem;
        $item->medicine_id = $id;

        foreach ($medicine_quantity as $id2) {
            $item->historyitem_quantity = $id2;
        }
        $item->save();
        $count++;
    }

I wanted to store these values in my DB.

array:3 [▼
          0 => "25"
          1 => "3"
      ]
 array:3 [▼
          0 => "32"
          1 => "10"
      ] 
array:3 [▼
          0 => "30"
          1 => "6"
      ]

but instead I get these values:

array:3 [▼
          0 => "25"
          1 => "6"
      ]
 array:3 [▼
          0 => "32"
          1 => "6"
      ] 
array:3 [▼
          0 => "30"
          1 => "6"
      ]

Possible duplicate of [Is there a php function like python's zip?](https://stackoverflow.com/questions/2815162/is-there-a-php-function-like-pythons-zip) — Federico klez Culloca, Feb 19 '19 at 08:08
I didn't know we could do that @FedericoklezCulloca I had to try with the question and it works great ! https://3v4l.org/6PTgI — Clément Baconnier, Feb 19 '19 at 08:21

Hirdesh Vishwdewa · Accepted Answer · 2019-02-19T08:14:39.933

Solution is change your foreach loop to this:

$count = 0;
foreach ($medicine_order as $key=>$id) {
    $item = new Historyitem;
    $item->medicine_id = $id;
    $item->historyitem_quantity = $medicine_quantity[$key];
    $item->save();
    $count++;
}

Reason why you are getting wrong result is, your internal foreach loop, it iterates over every element of your $medicine_quantity array and every time it replaces the older value with new value, hence you are getting the value of last index i.e., "6" in final result.

score 3 · Answer 2 · answered Feb 19 '19 at 08:09

You need to process the $medicine_quantity values in the same order as the $medicine_order values, which you can do by matching the keys to each array. Try this instead:

foreach ($medicine_order as $key => $id) {
    $item = new Historyitem;
    $item->medicine_id = $id;
    $item->historyitem_quantity = $medicine_quantity[$key];
    $item->save();
    $count++;
}

Is there an alternative for array_merge?

2 Answers2