Laravel 检查属性存在

Question

我如何检查现有属性(property) $this->team->playerAssignment->player以更理性的方式？现在我像这样检查它:

if ($this->team)
   if (($this->team->playerAssignment))
      if (($this->team->playerAssignment->player))

Answer 1

试试isset php函数。

isset — 确定变量是否已设置且不为 NULL

if(isset($this->team->playerAssignment->player)){

}