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Homephp教程php手册php构造函数的继承方法

这篇文章主要介绍了php构造函数的继承方法,实例分析并总结了构造函数继承的各种常见情况,需要的朋友可以参考下

本文实例讲述了php构造函数的继承方法。分享给大家供大家参考。具体如下:

第一种情况:子类没有定义构造函数时,,默认继承。例子:

name="小强"; } } class B extends A{ } $bb = new B(); ?>

输出结果:小强

第二种情况:子类定义了构造函数,则不会被继承。实例:

name="小强"; } } class B extends A{ function __construct(){ echo "BBBBBB子类"; } } $bb = new B(); ?>

输出结果:BBBBBB子类

第三种情况:如果需要调用父类的构造函数,则可以使用:parent::父类函数 或 父类名::父类函数。

希望本文所述对大家的php程序设计有所帮助。

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