学步园

自己以为解释static 解释比较好的列子，希望大家，也能通过它来理解

<?php<br /> // USING the same method in an instance and in a static context<br /> // If you want to have the same definition of a method that you<br /> // want to use both as static and as instance method, a classname control of $this<br /> // variable is needed. This tip can be used wether the caller context is not the same class type<br /> class A<br /> {<br /> private $myProp = 'A';</p> <p> public function myMethodA()<br /> {<br /> if(isset($this) && get_class($this) == __CLASS__)<br /> return $this->myProp;<br /> return 'C';<br /> }<br /> }<br /> class B<br /> {<br /> public $myProp = 'B';</p> <p> public function myMethodB()<br /> {<br /> $a = new A;<br /> return $a->myMethodA().' ++++ '.A::myMethodA();<br /> }<br /> }<br /> $b = new B();<br /> echo $b->myMethodB(); // output: A ++++ C<br /> // NOTE:<br /> // if you don't verify "&& get_class($this) == __CLASS__"<br /> // it will output A ++++ B, it seems that if a method is not marked as "static"<br /> // its scope would be the scope in which the function was called<br /> ?><br />