I’m trying to make a form that looks like this:

where if inside of the input type =text is something like a number auto-check the CHECKBOX, is jquery? or simple PHP.

Ahh, the more important thing, I'm using woocommerce, so i make the function like that.

add_action('woocommerce_after_order_notes', 'my_custom_checkout_field');





function my_custom_checkout_field( $checkout ) {









    woocommerce_form_field( 'losung', array( 

        'type'          => 'text', 

        'class'         => array('my-field-class'), 



        'label'         => __('titel'), 

        'placeholder'   => __('Enter a number'),

        ), $checkout->get_value( 'my_field_name' ));

        echo '<div class=spiele-container>';

        echo '<input class=input-checkbox pull-left id= type=checkbox name=ter>';

        echo '<div id=text-container-spiele>text ';

    echo '</div>';

    echo '</div>';



}