How to count all data item array in laravel - arrays

Question

How to count all data item array in laravel, please help me!. Thank you so much!
Output: 8

Answer 1

reduce()
The reduce method reduces the collection to a single value, passing
the result of each iteration into the subsequent iteration:
$count = collect([
(object)["views_back" => 3],
(object)["views_back" => 5]
])->reduce(function ($carry, $item) {
return $carry + $item->views_back;
});
var_export($count); // 8
Addendum
Alternatively, using native/vanilla PHP:
$count = array_sum(array_column([
(object)["views_back" => 3],
(object)["views_back" => 5]
], "views_back"));
var_export($count); // 8

Answer 2

When working with arrays in Laravel, it can be helpful to convert them to a Collection which provides some helper methods for arrays.
If all you want is the number of elements in the array use count.
If you want the sum of the views_back elements, use reduce.
$array = [
[
'views_back' => 3,
],
[
'views_back' => 5,
]
];
$count = collect($array)->count();
$sum = collect($array)->reduce(function ($carry, $element) {
return $carry + $element['views_back'];
});
dd($count, $sum);
In the above $count is 2 and $sum is 8.
If your original data is json (as you've used a json tag), you will need to convet the data to an array first:
$array = json_decode($json, true);

Answer 3

You can use laravel collection method sum() method to write smaller code and make it easier to read.
$data = [
(object)["views_back" => 3],
(object)["views_back" => 5]
];
collect($data)->sum('views_back');
Converting array to collection can be CPU costly depending on the size of the input array. In that case #steven7mwesigwa vanilla PHP answer would be the best solution.