php调用是啥意思?解决思路

WBOY
Release: 2016-06-13 12:25:45
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php调用是啥意思?
在下刚学php,在本人的理解一般调用类里的方式是 
1,$a=new A();
      $a-> AMeth();
2,A::AMeth();


但是现在要求学习下CI架构我看里面的调用方式是
$this->seesion->AMeth();

请问这种调用方式那个session是自定义的吗?  怎么解释这个调用方式,,,,小弟才疏学浅,刚学,求赐教
------解决思路----------------------
-> ->这种连贯的方法 每次都返回一个对象。。  session是一个属性,保存了一个对象。

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