Home >Backend Development >PHP Tutorial >An example of understanding PHP object-oriented programming (OOP), object-oriented programming oop_PHP tutorial
<?<span>php<br /><br /> </span><span>class</span><span> Person{<br /><br /> //声明一个新变量公共变量<strong>$name</strong>,可被任何包中的类访问<br /> </span><span>public</span> <span>$name</span><span>; </span><span>public</span> <span>$sex</span><span>; </span><span>public</span> <span>$age</span><span>;<br /><br /> //声明该类的一个方法 </span><span>function</span><span> say() { </span><span>echo</span> "你好!<br />"<span>; </span><span>echo</span> "我的的名字是:" . <span>$this</span> -> name ."<br />"<span>; </span><span>echo</span> "我的性别是:" . <span>$this</span> -> sex ."<br />"<span>; } } <br /> //声明新的Student类为Person的子类 </span><span>class</span> Student <span>extends</span><span> Person{ </span><span>public</span> <span>$school</span><span>; </span><span>function</span><span> study() {<br /> //parent:: 可用于调用父类中定义的成员方法。<br /> parent::say();</span><span>echo</span> "我的年龄是:" . <span>$this</span> -> age . "<br />我正在" . <span>$this</span> -> school . "上学。"<span>; } } <br /> //只用将P1定义为学生类即可 </span><span>$p1</span> = <span>new</span><span> Student();<br /><br /> //为P1的name,sex,age,school属性赋值 </span><span>$p1</span> -> name = "张三"<span>; </span><span>$p1</span> -> sex = "男"<span>; </span><span>$p1</span> -> age = "18"<span>; </span><span>$p1</span> -> school = "某某学校"<span>; </span><span>$p1</span> -><span> study(); </span>?>
The browser output is as follows:
Hello!
My name is: Zhang San
My gender is: Male
My age is: 18
I am attending a certain school.