Some questions about the object-oriented development of PHP

Some problems in object-oriented development of PHP
The following code is a method in a class:
Public Function GetHead () {
$map = Array (
' A.state ' =>array (' eq ', 1),
' A.recommend ' =>array (' eq ', 1)
);
$prefix = C (' Db_prefix ');
$data = $this->table ("{$prefix}auction as A")
Join ("{$prefix}accessory as AC on a.goods_pic = Ac.id")
Join ("{$prefix}accessory as ACC on a.agopic = Acc.id")
Field (' A.*,ac.path,acc.path as Agopath ')->where ($map)
Find ();
return $data;
}

In the following code $this->table ("..."), no defined table () method can be found anywhere! Why do you ask for advice?
$data = $this->table ("{$prefix}auction as A")
Join ("{$prefix}accessory as AC on a.goods_pic = Ac.id")
Join ("{$prefix}accessory as ACC on a.agopic = Acc.id")
Field (' A.*,ac.path,acc.path as Agopath ')->where ($map)
Find ();
------Solution--------------------
The class in which your method resides is inherited from a database base class (or it may be a base class)
If you do not find the definition of the table method in this class (or his parent class), then you must define a __call method

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