php类声明和php类使用方法示例分享_php实例
/**php语言是支持面向对象编程的,对于面向对象的编程,学过java和C++的人都知道啊!
*如果不清楚的去baidu问一下就可以了。
*/
//我们来定义一个类,定义类的关键字是 “class”
class computer {
//在类里面可以创建方法,变量等
//定义一个加法
function add ($n1,$n2) {
$sum = $n1 + $n2;
return $sum;
}
//定义一个减法
function jf ($n1,$n2) {
$sum = $n1 - $n2;
return $sum;
}
//定义一个乘法
function cf ($n1,$n2) {
$sum = $n1 * $n2;
return $sum;
}
}
/**
如何使用类中的方法,就要创建类的对象,用对象调用方法
下面是调用类的方法
*/
//$com 就是computer类的对象,创建对象用new关键字
$com = new computer();
//调用类中的方法就用 对象名 -> 方法名(参数,参数...)
echo $com -> add(1,2);
echo $com -> jf(1,2);
echo $com -> cf(1,2);
//这些方法被按钮调用的化,就可以简单编写出一个计算器来,
//每个按钮对应一个方法
?>

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