<div class="codebody" id="code74731">
class ClassA{
public function construct(){
echo “ClassA load success!”;
}
}
//定义一个类ClassA，文件名为ClassA.PHP
class ClassA{
public function construct(){
echo “ClassA load success!”;
}
}
class ClassB extends ClassA {
public function construct(){
//parent::construct();
echo “ClassB load success!”;
}
}
//定义一个类ClassB，文件名为ClassB.PHP，ClassB继承ClassA
class ClassB extends ClassA {
public function construct(){
//parent::construct();
echo “ClassB load success!”;
}
}
定义两个测试用的类之后，我们来编写一个含有__autoload()方法的PHP运行程序文件如下：
function autoload($classname){
$classpath=”./”.$classname.'.PHP';
if(file_exists($classpath)){
require_once($classpath);
}
else{
echo ‘class file'.$classpath.'not found!';
}
} $newobj = new ClassA();
$newobj = new ClassB();