* [ ] 获取设置参数 ``` obtain($Name = null, $Default = null); ``` Name(string|array)：参数名称 (支持字符串获取数组) Default：参数不存在时的默认内容 ***** ``` <?php class index { use \TempLets; //使用模板类要使用use引入 public function main() { $this->assign(['usera'=>1,'name'=>'admin']); $this->assign('a.b.c','数组创建');//创建了数组：['a'=>'b'=>['c'=>'数组创建']] $this->assign('username','administrator'); $this->assign('arr',['a'=>['b'=>['c']=>'多维数组']]); echo $this->obtain('usera');//输出：1 echo $this->obtain('name');//输出：admin ps($this->obtain('a')) ;//输出：['b'=>['c'=>'数组创建']] echo $this->obtain('username');//输出：administrator ps($this->obtain('arr.a.b.c')); //输出：多维数组 } } ```