Getting Started with PHP 8 Object Oriented 3 Interface

Keyword interface

The interface cannot have implemented methods

Cannot use data, but can have constants

JAVA interface: http://blog.csdn.net/a289672082/article/details/51518398

<code><span><span><?php</span><span><span>interface</span><span>Code</span>{</span><span>//public $data=123;  错误 接口中不能有访问属性的数据</span><span>const</span>   data =<span>123</span>;<span>//正确 接口中可以使用常量</span><span>public</span><span><span>function</span><span>_print</span><span>()</span>;</span><span>//public  function _print2(){};  错误,接口中不能用实现的方法</span>
}

<span><span>class</span><span>CPlusPlus</span><span>implements</span><span>Code</span>{</span><span>public</span><span><span>function</span><span>_print</span><span>()</span>
    {</span><span>echo</span><span>"std::cout <br>"</span>;

    }  
}

<span><span>class</span><span>JavaScript</span><span>implements</span><span>Code</span>{</span><span>public</span><span><span>function</span><span>_print</span><span>()</span>
    {</span><span>echo</span><span>"console.log(...) <br>"</span>;

    }
}

<span>$C</span> = <span>new</span> CPlusPlus();
<span>$JS</span> = <span>new</span> JavaScript();
<span>$C</span>->_print();
<span>$JS</span>->_print();
<span>?></span></span></code>

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