我有一个带有自定义字段的帖子类型报价，我想创建一个通知，向电子邮件地址集发送电子邮件提醒。当日期条件匹配时发送It提醒。我写了这个函数脚本。

function set_mail_html_content_type() {
    return \'text/html\';
}

function notification_fields(){
    // Get the \'Profiles\' post type
    $args = array(
    \'post_type\' => \'quote\',
    );
    $loop = new WP_Query($args);
    while($loop->have_posts()){
        $loop->the_post();
        $days = "30";
        $eventName = types_render_field( "event-name", array( \'raw\' => true));
        $email = types_render_field( "email-user", array( \'raw\' => true));
        $eventdate = types_render_field( "event-date", array( \'raw\' => true) );
        $newDate = date("d-m-Y", strtotime($eventdate));
        $date = strtotime (\'-30 days\', strtotime ($newDate));
        $date = date (\'d-m-Y\', $date);
        $today = date("d-m-Y");
        $balance = types_render_field( "remaining", array( \'raw\' => true) );
        if (!empty($balance) && $today === $date ) {
            $to = $email;
            $subject = "Payment reminder";
            $content = \'Please pay the final payment here\';
            /*$from = "no-reply@website.com";
            $headers = "From:" . $from;*/
            $status = wp_mail($to,$subject,$content,$headers);
            add_filter( \'wp_mail_content_type\', \'set_mail_html_content_type\' );
            return $status;
            remove_filter( \'wp_mail_content_type\', \'set_mail_html_content_type\' );
        }
    }
    wp_reset_query();
    //return;
}
add_action( \'customemail_fields\', \'notification_fields\',10, 2 );