Return the values of an array from a specified list of keys using dot notation in Laravel 5

Question

I am using Laravel 5.6. I want a function that returns only the specified key / value pairs from the given array using the dot notation.

For example:

$array = [
    'name' => [
        'first' => 'John', 
        'last' => 'Smith'
    ], 
    'price' => 100,
    'orders' => 10
];


$slice = someFunc($array, ['name.first', 'price']);

should return:

[
    'name' => [
        'first' => 'John'
    ],
    'price' => 100,
]

The closest function that does this is in Laravel that I can find is the array_only function:

https://laravel.com/docs/5.6/helpers#method-array-only

However, it does not support the dot notation (unlike some other Laravel functions).

How can I achieve this?

You could combine array_dot and array_only, e.g: array_only(array_dot($array), ['name.first', 'price']); and if you need it to be a single function then you could add your own helper that wraps these 2 functions. — sam
– sam, Commented Mar 20, 2018 at 16:32
Tryied $array = collect($array); $array->get('name.first'); but it sends me null. — Anwar
– Anwar, Commented Mar 20, 2018 at 16:41

samrap · Accepted Answer · 2018-03-20 16:37:51Z

2

There's two options you could use off the top of my head. The first is to use array_dot to flatten a multi-dimensional array into a one dimensional dot notated array:

$flattened = array_dot([
    'name' => [
        'first' => 'John', 
        'last' => 'Smith'
    ], 
    'price' => 100,
    'orders' => 10
]);

This would yield the following result:

[
    'name.first' => 'John',
    'name.last' => 'Smith',
    'price' => 100,
    'orders' => 10,
]

From there you can get everything except orders using array_except($flattened, 'orders'). Of course, the resulting array will still be in dot notation which may not be ideal for you.

The second option I can think of is merging multiple calls to array_get, since it supports dot notation.

answered Mar 20, 2018 at 16:37

samrap

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2 Comments

Yahya Uddin Over a year ago

Unfortunately the first option as you said puts everything in dot notation. I would like it to be in the same format.

samrap Over a year ago

Take a look at this: stackoverflow.com/questions/9635968/…

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