interface
定义了一个接口类,它里面的方法其子类必须实现。接口是类的一个模板,其子类必须实现接口中定义的所有方法。
interface User{
function getHeight($height);
function getWeight($weight);
}
class my implements User{
function getHeight($username){
echo $height;
}
function getWeight($weight){
echo $weight;
}
}
abstract
抽象类就把类像的部分抽出来,就是把重复的东西写到抽象类中,减少工作量。只要方法没有用abstract声明,在其子类中就不用实现。而且在子类中该方法为公共方法。
abstract User{
abstract function getHeight($height);
function getWeight(){
echo $weight;
}
}
class my extends User{
function getHeight($height){
echo $height;
}
function getInfoById($id){
$this->getWeight.“
”;echo $id;
}
}

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