Hello Laravel developers! In Laravel, working with collections is even more powerful and intuitive. Today, we'll explore two useful methods available in Laravel's Collection class: contains() and containsStrict(). These methods allow you to check if a collection contains a specific value. Let's dive in and see how they work with some examples!

contains() Method: 
The contains() method checks if a collection contains a given value. It returns true if the value is found, and false otherwise. Here's an example:

$numbers = collect([1, 2, 3, 4, 5]);

$containsThree = $numbers->contains(3);

// Output: true

In the above example, we create a collection of numbers and use the contains() method to check if the collection contains the value 3. Since 3 is present in the collection, the contains() method returns true.

containsStrict() Method: 
The containsStrict() method works similarly to contains(), but it performs a strict comparison, including both the value and the data type. Here's an example:

$fruits = collect(['apple', 'banana', 'cherry']);

$containsNumber = $fruits->containsStrict(5);

// Output: false

In this example, we have a collection of fruits and use the containsStrict() method to check if the collection contains the value 5. Since 5 is not present in the collection, and it's a different data type than the string values, the method returns false.

Additional Example: 
Here's another example demonstrating the use of the contains() method with a custom callback function:

$users = collect([
    ['name' => 'John', 'age' => 25],
    ['name' => 'Jane', 'age' => 30],
    ['name' => 'Alice', 'age' => 35],
]);

$containsJane = $users->contains(function ($user) {
    return $user['name'] === 'Jane';
});

// Output: true

In this example, we create a collection of users and use the contains() method with a callback function to check if the collection contains a user with the name 'Jane'. The callback function compares the name of each user with the desired value, and since 'Jane' is present in the collection, the method returns true.