Introduction to PHP 8 Object Oriented 2 Abstract Class
Jul 28, 2016 am 08:26 AM
1. Abstract classes must be inherited to be used and cannot be directly new
2. Abstract classes can have non-abstract methods
3. Subclasses must implement all abstract methods
4. Similar to JAVA’s abstract classes
(Click to go to)JAVA's abstract class
<code><span><span><?php</span><span>//抽象類關(guān)鍵字 abstract 抽象類不能實(shí)例化 必須被繼承才能使用</span><span>abstract</span><span><span>class</span><span>_parent</span>{</span><span>//抽象方法關(guān)鍵字 abstract</span><span>public</span><span>abstract</span><span><span>function</span><span>fun1</span><span>()</span>;</span><span>//抽象類中可以用非抽象方法</span><span>public</span><span><span>function</span><span>parentfunc</span><span>()</span> {</span><span>echo</span><span>"Hello<br>"</span>;
}
}
<span><span>class</span><span>Test</span><span>extends</span><span>_parent</span>{</span><span>//必須實(shí)現(xiàn)抽象類的所有抽象方法</span><span>public</span><span><span>function</span><span>fun1</span><span>()</span>{</span><span>echo</span><span>"class Test<br>"</span>;
}
}
<span>$A</span> = <span>new</span> Test();
<span>$A</span>->fun1();
<span>$A</span>->parentfunc();
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The above introduces PHP Introduction 8 Object-Oriented 2 Abstract Classes, including aspects of content. I hope it will be helpful to friends who are interested in PHP tutorials.
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