QuickEmailVerification

<?php
 
/*
 * Plugin Name: Quform QuickEmailVerification Integration
 * Description: Validate email addresses using QuickEmailVerification.
 * Version: 1.0.0
 */
 
add_filter('quform_element_valid_1_3', array('Quform_QuickEmailVerification', 'validate'), 10, 3); 
class Quform_QuickEmailVerification
{
    public static function verify($email)
    {
        require_once 'vendor/autoload.php';
 
        $client = new QuickEmailVerification\Client('API_KEY');        $quickemailverification = $client->quickemailverification();
 
        try {
            $response = $quickemailverification->verify($email);
        } catch (Exception $e) {
            // Ignore exceptions (optional)
            $response = null;
        }
 
        return $response;
    }
 
    public static function validate($valid, $value, $element)
    {
        if ($valid) {
            $response = Quform_QuickEmailVerification::verify($value);
 
            if ($response && isset($response->body) && is_array($response->body) && $response->body['result'] == 'invalid') {
                if (Quform::isNonEmptyString($response->body['did_you_mean'])) {
                    $element->addError(sprintf('Invalid email address - did you mean <b>%s</b>?', $response->body['did_you_mean']));
                } else {
                    $element->addError('Invalid email address');
                }
 
                $valid = false;
            }
        }
 
        return $valid;
    }
}