PHP学习（10）面向对象开发学习（三）
<?php//继承
class Root{
function dayin(){
return "Root print <BR>";
}
}
class Son extends Root{
function dayin2(){
return $this->dayin()."Son print <br>";
}
}
$p=new Son();
echo $p->dayin();
echo $p->dayin2();
?>
<?php
//重名继承
class Root{
function dayin(){
return "Root print <BR>";
}
}
class Son extends Root{
function dayin(){
return Root::dayin()."Son print <br>";
}
}
$p=new Son();
echo $p->dayin();
?>
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