Is there an alternative for array_merge? - php

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"
]

Answer 1

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.

Answer 2

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++;
}