====== 自定义字段使用 ====== == 调用字段 ==


$field = $this->fields->fieldName;

== 输出字段 ==


$this->fields->fieldName();

== 判断字段 ==


if(isset($this->fields->fieldName)){
  echo '字段存在，值为：'.$this->fields->fieldName;
}else{
  echo '字段不存在';
}