摘要： 1、php隐性的三元操作符(?:)优先级问题：例1：$person = $who or $person = "laruence";//实际上是等同于:$person = empty($who)? "laruence" : $who;例2$arr = array（1=>1,3=>3）；$i = 2;$... 阅读全文