我尝试将所有代码更改为OOP，我是OOP和PHP的初学者。这很有效，但当我将代码更改为OOP时，我可以在更多地方使用我的类

function advanza_form_shortcode() {

    // Display the Advanza form with a shortcode
    $site_id = get_option(\'advanza_form_site_id\');
    $affiliate_id = get_option(\'advanza_form_affiliate_id\');
    $redirection = get_option(\'advanza_form_thankyou_page\');
    $url = "https://advanzaservices.com/wp/singleform.php?site_id={$site_id}&affiliate_id={$affiliate_id}&thankyou={$redirection}";

    $response = wp_remote_get( $url );

    if ( is_array( $response ) ) {
        $header = wp_remote_retrieve_headers($response[\'headers\']); // array of http header lines
        $body = wp_remote_retrieve_body($response); // use the content
        $status_code = wp_remote_retrieve_response_code($response);

        if($status_code == 200) {
            return $body;
        } else {
            return $status_code;
        }
   }
} add_shortcode( \'advanza-form\', \'advanza_form_shortcode\' );

class advanza_form {
    public $site_id;
    public $affiliate_id;
    public $redirection;
    public $url;

    public function __construct() {
        $this->site_id = get_option(\'advanza_form_site_id\');
        $this->affiliate_id = get_option(\'advanza_form_affiliate_id\');
        $this->redirection = get_option(\'advanza_form_thankyou_page\');
        $this->url = "https://advanzaservices.com/wp/singleform.php?site_id={$this->site_id}&affiliate_id={$this->affiliate_id}&thankyou={$this->redirection}";
    }

    public function display() {
        $response = wp_remote_get( $this->url );
        $header = wp_remote_retrieve_headers($this->response[\'headers\']); // array of http header lines
        $status_code = wp_remote_retrieve_response_code($this->response);

        try {
            if($status_code == 200) {
                $body = wp_remote_retrieve_body($response);
            } else {
                return $status_code;
            }
        } catch (Exception $e) {
            echo \'Caught exception: \', $e->getMessage(), "\\n";
        }// end try/catch

        return $body;
    }

    function debug() {
        echo \'Site ID: \' . $this->site_id . \'<br>\';
        echo \'Affiliate ID: \' . $this->affiliate_id . \'<br>\';
        echo \'Redirection: \' . $this->redirection . \'<br>\';
        echo \'URL: \' . $this->url . \'<br>\';
    }
}

function advanza_form_shortcode() {

    // Display the Advanza form with a shortcode
    $form = new advanza_form;
    $form->display();
    // $form->debug();

}
add_shortcode( \'advanza-form\', \'advanza_form_shortcode\' );