The **`clear`** method of the `Set` data structure removes all the `Set` values. 

A **Set** is a collection of unique values. In `Ds\Set`, we can store any value, including objects. The insertion order of the element is preserved.

#    
## Installing DS

By default, Data Structures (DS) is not installed in PHP. We can install it by following these instructions on [php.net](https://www.php.net/manual/en/ds.installation.php).

## Syntax

This method will make the `Set` empty.

---
```
public Ds\Set::clear(): void
```
---

<?php
    $set = new \Ds\Set();

    $set->add(1,2,3);
    print_r($set); //Ds\Set Object ( [0] => 1 [1] => 2 [2] => 3 )

    $set->clear();
    print_r($set); //Ds\Set Object ( )
?>

#   
## Explanation 

In the code above: 

* We have created an object of type `Set` data structure and added elements using the `add` method. 

* Then used the `clear` method of the `Set`. This will remove all the elements of the `Set`. 

What is the Ds\Set::clear method in php?

Removes all values from the Set, keeping insertion order. Install DS via php.net.

What is the Ds\Set::clear method in php?

Installing DS

Syntax

Code

Explanation