# Query Parameters

Like headers, query parameters can be added by using the `query()` method on either the connector or the request. When you add query parameters to a connector instance, every request sent through that connector will merge those parameters with the request. When you add query parameters to a request instance, it will just be added to that one request instance.

### Default Query Parameters

You may configure default query parameters on the connector or request using the protected `defaultQuery` method.

{% tabs %}
{% tab title="Connector" %}

```php
<?php

use Saloon\Http\Connector;

class ForgeConnector extends Connector
{
    // {...}
    
    protected function defaultQuery(): array
    {
        return [
            'per_page' => 50,
        ];
    }
}
```

{% hint style="info" %}
Default query parameters on a connector will be applied to every request that uses the connector.
{% endhint %}
{% endtab %}

{% tab title="Request" %}

```php
<?php

use Saloon\Http\Request;

class GetServersRequest extends Request
{
    // {...}
    
    protected function defaultQuery(): array
    {
        return [
            'per_page' => 50,
        ];
    }
}
```

{% endtab %}
{% endtabs %}

#### Using Properties With Default Query Parameters

You may also use properties in requests to populate query parameters, for example - requesting a specific page on a paginated API.

{% tabs %}
{% tab title="Definition" %}

```php
<?php

use Saloon\Http\Request;

class GetServersRequest extends Request
{
    // {...}
    
    protected int $perPage;
    
    protected int $page;
    
    public function __construct(int $perPage, int $page)
    {
        $this->perPage = $perPage;
        $this->page = $page;
    }
    
    protected function defaultQuery(): array
    {
        return [
            'per_page' => $this->perPage,
            'page' => $this->page,
        ];
    }
}
```

{% endtab %}

{% tab title="Usage" %}

```php
<?php

$request = new GetServersRequest(perPage: 50, page: 5);
```

{% endtab %}
{% endtabs %}

### Using the query Method

Saloon also offers a handy query parameters API to manage them easily after a request instance has been created. Use the `query()` method on your request to manage them. Query parameters added to the request are prioritised more than the connector's query parameters. This is useful for changing them before a request is sent.

```php
<?php

$request = new GetServersRequest();

$request->query()->add('page', 5);

$all = $request->query()->all();

// array: ['page' => 5]
```

{% hint style="warning" %}
When you have default query parameters on a connector, they won't be visible to the request instance as they are merged later in the request lifecycle. Still, request query parameters will have a higher priority than connector query parameters.
{% endhint %}

### Available Methods

#### set(array $items)

Overwrite the query parameters on the request with a new array.

#### merge(...$items)

Merge arrays of query parameters.

#### remove(string $key)

Remove a given query parameter by its key.

#### get(string $key, mixed $default = null)

Get a given query parameter by its key or return the default.

#### all()

Retrieve all query parameters as an array.

#### isEmpty

Check if the query parameter object is empty.

{% hint style="info" %}
Click here to view the API reference for this method.
{% endhint %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.saloon.dev/2/the-basics/query-parameters.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.