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php calls the method of the parent class in the subclass:
First create a parent class A and declare a method "test"
<?php class A{ public $a1='a1'; protected $a2='a2'; function test(){ echo "hello!<hr/>"; } }
Then create subclass B, use the keyword "extends" to inherit parent class A, create subclass B, use "parent::test()"
<?php class B extends A{//若A类和B类不在同一文件中 请包含后(include)再操作 public $a1='b1'; function test2(){ $this->test(); parent::test();//子类调用父类方法 } function test() { echo $this->a1.','; echo $this->a2.','; echo "b2_test_hello<hr/>"; } } $a = new B(); $a->test();//b1,a2,b2_test_hello $a->test2();//b1,a2,b2_test_hello//hello!
Related references: php中文网
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