WordPress主题消除了我的PayPal购买链接的＆符，之后又删除了所有文本

我在名为“信念”（由Chimpstudio编写）的主题中遇到了一个奇怪的错误。当用户发布或更新页面时，PayPal链接无法正确写入数据库。

据我所知，写入数据库的值包含在XML数组中，如下所示：

noSimpleXMLElement Object ( [0] => https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick )

在单击“发布/更新”之前，应该发布/更新的链接是：

https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick＆hosted_button_id = XXXXXXXXXXXXX

“ ＆hosted_button_id = XXXXXXXXXXXXX ”未保存，这意味着用户无法购买我的客户的产品。

可能的解决方案：我一直在研究主题的.php文件，寻找机会拦截传递给WordPress数据库的值。这个想法是在将变量发送到WP数据库之前对其进行包装/编码，希望整个URL字符串在URL的“ ＆hosted_button_id = XXXXXXXXXXXXX ”部分保持不变。

有什么解决方案或想法可能会有所帮助吗？

编辑：这可能是来自admin_functions.php文件的相关代码：

function events_meta_save($post_id) {

    global $wpdb;

    if (empty($_POST["event_ticket_price"])){ $_POST["event_ticket_price"] = "";}

    if (empty($_POST["event_social_sharing"])){ $_POST["event_social_sharing"] = "";}

    if (empty($_POST["event_buy_now"])){ $_POST["event_buy_now"] = "";}

    if (empty($_POST["event_phone_no"])){ $_POST["event_phone_no"] = "";}

    if (empty($_POST["switch_footer_widgets"])){ $_POST["switch_footer_widgets"] = "";}

    if (empty($_POST["event_start_time"])){ $_POST["event_start_time"] = "";}

    if (empty($_POST["event_end_time"])){ $_POST["event_end_time"] = "";}

    if (empty($_POST["event_all_day"])){ $_POST["event_all_day"] = "";}

    if (empty($_POST["event_address"])){ $_POST["event_address"] = "";}

     if (empty($_POST["event_ticket_options"])){ $_POST["event_ticket_options"] = "";}

    if (empty($_POST["event_map"])){ $_POST["event_map"] = "";}


    $sxe = new SimpleXMLElement("<event></event>");


        $sxe->addChild('event_ticket_price', $_POST['event_ticket_price'] );


        $sxe->addChild('event_social_sharing', $_POST["event_social_sharing"]);

        $sxe->addChild('event_buy_now', $_POST["event_buy_now"]);

        $sxe->addChild('event_phone_no', $_POST["event_phone_no"]);

        $sxe->addChild('switch_footer_widgets', $_POST["switch_footer_widgets"]);

        $sxe->addChild('event_start_time', $_POST["event_start_time"]);

        $sxe->addChild('event_end_time', $_POST["event_end_time"]);

        $sxe->addChild('event_all_day', $_POST["event_all_day"]);

        $sxe->addChild('event_ticket_options', $_POST["event_ticket_options"]);

        $sxe->addChild('event_address', $_POST["event_address"]);

        $sxe->addChild('event_map', $_POST["event_map"]);

    echo "<pre>BPOST: ".print_r($_POST, true)."</pre>";
    print_r($sxe);

    $sxe = save_layout_xml($sxe);
    print_r($sxe);
    update_post_meta($post_id, 'cs_event_meta', $sxe->asXML());

}

此外，这是来自events.php文件的XML方面的更多代码：

// event custom fields start
add_action( 'add_meta_boxes', 'cs_event_meta' );  
function cs_event_meta()
{
    add_meta_box( 'event_meta', 'Event Options', 'cs_event_meta_data', 'events', 'normal', 'high' );
}
function cs_event_meta_data($post) {
    $cs_event_meta = get_post_meta($post->ID, "cs_event_meta", true);
    global $cs_xmlObject;
    if ( $cs_event_meta <> "" ) {
        $cs_xmlObject = new SimpleXMLElement($cs_event_meta);
            $event_ticket_price = $cs_xmlObject->event_ticket_price;
            $event_social_sharing = $cs_xmlObject->event_social_sharing;
            $event_start_time = $cs_xmlObject->event_start_time;
            $event_end_time = $cs_xmlObject->event_end_time;
            $event_all_day = $cs_xmlObject->event_all_day;
            $event_address = $cs_xmlObject->event_address;
            $event_loc_lat = $cs_xmlObject->event_loc_lat;
            $event_loc_long = $cs_xmlObject->event_loc_long;
            $event_loc_zoom = $cs_xmlObject->event_loc_zoom;

            $testVar = $cs_xmlObject->event_buy_now;

            if (strstr($cs_xmlObject->event_buy_now, "&amp;"))
            {
                echo "yes"; //$event_buy_now = ($cs_xmlObject->event_buy_now . 'FINDME(yes)');
                print_r ($testVar);
            }
            else
            {
                echo "no"; //$event_buy_now = ($cs_xmlObject->event_buy_now . 'FINDME(no)');
                print_r ($testVar);
                print_r ($cs_xmlObject);
            }

            $event_ticket_options = $cs_xmlObject->event_ticket_options;
            $event_map = $cs_xmlObject->event_map;
    }
    else {
        $event_ticket_price = '';
        $slider_id = '';

        $event_social_sharing = '';
        $event_related = '';
        $event_start_time = '';
        $event_end_time = '';
        $event_all_day = '';
        $event_address = '';
        $event_loc_lat = '';
        $event_loc_long = '';
        $event_loc_zoom = '';
        $inside_event_related_post_title = '';
        $event_map = '';
        $event_buy_now = '';
        $event_ticket_options = '';
    }

注意：这两个代码段都位于父主题的/ include /目录中。此时，尚无子主题-如有必要，将创建子主题来实施这些更新。