<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www./TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www./1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>abstract</title>
</head>
<body>
<?php
//定义一个类
abstract class c1{
abstract function fun1();
function shuchu(){
echo "这是class1";
}
};
//定义一个子类
class c2 extends c1{
function fun1(){
echo "这是class2";
}
};
$echo=new c2();
$echo->fun1();
?>
</body>
</html>
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