laravel array remove same

Laravel is a popular PHP development framework that provides many convenient auxiliary functions. During development, there are often times when you need to remove identical values ​​from an array. This article will introduce how to use Laravel's own helper functions to achieve this function.

1. Use the array_unique function

The array_unique function is a function that comes with PHP and can be used to remove duplicate values ​​​​in an array. Using this function is very simple, you only need to pass in the array that needs to be deduplicated as a parameter.

For example, we have an array $arr, whose elements are as follows:

$arr = [1, 2, 2, 3, 4, 4, 4, 5];

If you want to remove duplicate elements, you can use the array_unique function:

$uniqueArr = array_unique($arr);

In this way, $uniqueArr is an array after deduplication.

However, this method has a disadvantage, that is, the subscript of the array element after removal will be reset, so it is not suitable for situations where the original subscript needs to be retained.

2. Using Laravel's auxiliary functions

Laravel provides a series of convenient and practical auxiliary functions, including functions for processing arrays. One of the commonly used functions is the collect function, which can wrap an array into a collection and then use the methods provided by the collection to operate.

Use the collect function to encapsulate the array into a collection:

$collection = collect($arr);

Then, we can use the unique method to remove the same elements:

$uniqueCollection = $collection->unique();

In this way, $uniqueCollection is a deduplication collection after.

Different from the array_unique function, after using the unique method, the subscripts of the original array elements are retained. If you need to return an array without subscripts, you can use the values ​​method:

$uniqueArr = $uniqueCollection->values()->all();

In this way, $uniqueArr is an array without subscripts after deduplication.

3. Using Laravel's Collection class

In addition to using auxiliary functions, Laravel also provides another more convenient method, which is to use the Collection class.

The Collection class is a collection class provided by Laravel, which encapsulates various operations on arrays. Array operations can be performed more conveniently using the Collection class.

The steps to use the Collection class to perform deduplication operations are as follows:

First, create a Collection instance:

$collection = collect($arr);

Then, use the unique method to perform deduplication:

$uniqueCollection = $collection->unique();

Finally, you can use the toArray method to convert the collection into an array:

$uniqueArr = $uniqueCollection->toArray();

Compared with using auxiliary functions, using the Collection class can reduce code redundancy and make the code simpler and easier to understand.

Summary

This article introduces how to use Laravel to remove identical values ​​​​in an array. Using the array_unique function that comes with PHP can easily deduplicate an array, but it may cause the problem of array subscript resetting. Using Laravel's helper functions or Collection classes can avoid this problem and provide a more convenient code implementation. In actual development, you can choose a suitable method to perform array deduplication according to your needs.

The above is the detailed content of laravel array remove same. For more information, please follow other related articles on the PHP Chinese website!