getting data from array attribute - php

Question

I have a query:
$stockBook = DB::select(DB::Raw(" my query"));
dump($stockBook);
My o/p:
array:1 [▼
0 => {#533 ▼
+"BOOKID": "1"
+"REMAINING": 17.0
}
]
I want to retrieve the REMAINING attribute data, but I am getting error. I tried :
$remain_ = $stockBook[1]['REMAINING'];
Undefined offset: 1
again I tried
$remain_ = $stockBook->REMAINING;
Trying to get property 'REMAINING' of non-object
How can get the value of REMAINING attribute?

Answer 1

if you have only single object inside array then you can use this
$arr = array:1 [▼
0 => {#533 ▼
"BOOKID": "1"
"REMAINING": 17.0
}
]
$object = collect($arr);
$item = $object->first();
dd($item->REMAINING);
But if you have multiple objects inside array then use this
$arr = array:1 [▼
0 => {#533 ▼
"BOOKID": "1"
"REMAINING": 17.0
},
1 => {#533 ▼
"BOOKID": "1"
"REMAINING": 17.0
}
]
$object = collect($arr);
$list = $object->pluck("REMAINING");
dd($list);
By using above example you will get list of all the Remainings from array object.
Hope this will help you.

Answer 2

Array numeration starts with 0 so $array[0] is the first element, not $array[1].
$stockBook = (array)$stockBook;
$remain_ = $stockBook[0]['REMAINING'];

Answer 3

Try this:
$stockBook[0]->REMAINING;
If you want to retrieve element from array use []
If you want to retrieve element from object use ->
In your example we see that you have array of php objects,
then you should use both.

Answer 4

foreach((array)$stockBook as $key => $value){ // $stockBook or $stockBook[0]
var_dump($key, $value);
}
// or
var_dump($stockBook->BOOKID, $stockBook->REMAINING); // $stockBook or $stockBook[0]

Answer 5

If this is your data structure
array:1 [▼
0 => {#533 ▼
+"BOOKID": "1"
+"REMAINING": 17.0
}
]
and this is what you do
$remain_ = $stockBook[1]['REMAINING'];
Undefined offset: 1
Then the error message explain the first part of your problem. You are trying to access the element with index 1 in an array that only has one element with index 0. Arrays are zero-based. That means, the first element is 0, the second is 1 etc. So you are trying to access an element that doesn't exist.
The second issue, according to your comment
Cannot use object of type stdClass as array when I did $remain_ =
$stockBook[0]['REMAINING'];
indicates that each element in the array is an object.
So to get the REMAINING attribute of the object at index 0 in the array you could do.
echo $stockBook[0]->REMAINING; // would print "17.0"