Laravel检查属性存在

Question

如何$this->team->playerAssignment->player更合理地检查现有财产？现在，我像这样检查它：

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

Answer 1

尝试使用isset php函数。

isset —确定是否设置了变量并且不为NULL

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

}