Wordpress WPForms - Preselect the dropdown based on URL parameter

functions.php

<?php
/**
 * WPForms - Preselect dropdown based on URL parameter.
 * 
 * @param array $field
 * @param array $form_data
 * @return array
 */
function wpforms_preselect_dropdown( $field, $form_data ) {
	
	// Only need to continue if the form and field that we are looking for
    // Also only need to continue if the URL parameter available in the request
    if('103' == $form_data['id'] && '5' == $field['id'] && isset($_GET['url_param']) && !empty($_GET['url_param'])){
        // Check the parameter value exists in the dropdown, 
        // If it yes then set it to default
        // Also unset the other options
        foreach ( $field['choices'] as $key => $choice ) {
            if ( $choice['label'] == $_GET['venue'] ) {
                $field['choices'][$key]['default'] = '1';
            }else{
                unset($field['choices'][$key]['default']);
            }
        }
    }
    
    return $field;
}

// Modify Field before render
add_filter( 'wpforms_field_data', 'wpforms_preselect_dropdown', 10 , 2 );