Check Every Key Exists in a PHP Array with Arr::hasAll()

Introduction

In Laravel 12.16, a new hasAll method was added to the Illuminate\Support\Arr class. The Arr::hasAll method allows you to check if all specified keys exist in an array, making it easy to validate the presence of multiple keys at once.

The method was contributed by @devajmeireles in PR #55815.

In this Quickfire article, I'm going to show you how to use the Arr::hasAll method in your Laravel applications.

Checking if All Keys Exist in an Array

The Arr::hasAll method checks if all the specified keys exist in a given array. If all the keys are present, the method will return true. Otherwise, it will return false.

The method accepts two parameters:

• array - The array to check.
• keys - A single key or an array of keys to check for existence in the array.

Let's take a look at an example of how to use this method:

        
 1use Illuminate\Support\Arr;
 2 
 3$user = [
 4  'name' => 'Ash Allen',
 5  'location' => 'United Kingdom',
 6  'role' => 'Web developer',
 7];
 8 
 9Arr::hasAll(array: $user, keys: 'name'); // true
10Arr::hasAll(array: $user, keys: ['name', 'location']); // true
11 
12Arr::hasAll(array: $user, keys: 'language'); // false
13Arr::hasAll(array: $user, keys: ['name', 'language']); // false    

As we can see in the example above, the first two calls to Arr::hasAll return true because the specified keys exist in the $user array. The last two calls return false because the language key does not exist in the array.

Checking if Nested Keys Exist in an Array

A handy feature of the Arr::hasAll method is that it can also check for nested keys in an array. This is particularly useful when dealing with more complex data structures.

For instance, let's take our previous example and add a nested links array to the user data:

        
 1use Illuminate\Support\Arr;
 2 
 3$user = [
 4  'name' => 'Ash Allen',
 5  'location' => 'United Kingdom',
 6  'role' => 'Web developer',
 7  'links' => [
 8    'linked_in' => 'linkedin.com/in/ashleyjcallen/',
 9    'github' => 'github.com/ash-jc-allen'
10  ]
11];
12 
13Arr::hasAll(array: $user, keys: 'links.linked_in'); // true
14Arr::hasAll(array: $user, keys: ['links.linked_in', 'links.github']); // true
15 
16Arr::hasAll(array: $user, keys: ['links.x']); // false
17Arr::hasAll(array: $user, keys: ['links.linked_in', 'links.github', 'links.x']); // false    

As we can see in the example above, we can use dot notation (e.g. links.linked_in) with the Arr::hasAll method to check nested keys. The first two calls return true because the specified nested keys exist in the $user array. The last two calls return false because the links.x key does not exist in the array.

Related Articles

You might also be interested in reading these related articles that cover similar topics about arrays in PHP:

• New Array Functions in PHP 8.4
• How to Check If an Array Is Empty in PHP

Conclusion

In this Quickfire article, we've taken a quick look at how to use the new Arr::hasAll method in Laravel 12.16 to check if all specified keys exist in an array. Hopefully, this method will come in handy for you in your Laravel projects.

If you enjoyed reading this post, you might be interested in checking out my 220+ page ebook "Battle Ready Laravel" which covers similar topics in more depth.

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