# Use params on URL

Instead of having to change currencies by choosing from a dropdown list, you can change them on the URL by changing the currency code.

eg: {your-site-url}.com/?yay-currency=EUR. You can convert to USD currency by replacing EUR with USD.

<figure><img src="/files/svAQ2U2deBvCE4OilkEp" alt=""><figcaption></figcaption></figure>

To do this, you can add the following code to [Code Snippets](https://wordpress.org/plugins/code-snippets/) or to the file `functions.php` of your store theme.&#x20;

{% hint style="info" %}
It is recommended to add it to`functions.php` of child theme so that it will be preserved when you update the theme.
{% endhint %}

```
add_filter('yay_currency_use_params', 'yay_currency_use_params', 10,1);
function yay_currency_use_params( $use_param ) {
    return true;
}
```

In case you don't want to use this parameter: ?yay-currency. You can use this hook to rename it: yay\_currency\_param\_name&#x20;

<pre><code><strong>add_filter( 'yay_currency_param_name',  'custom_yay_currency_param_name' );
</strong>function custom_yay_currency_param_name( $param_name ) {
   $param_name = 'your_change';
   return $param_name;
}
</code></pre>


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