php组合 - w&y
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2022-04-28 18:39:38
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为了提高代码的复用性,降低代码的耦合(组合实现的两种方式)
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模式一:
1 php 2 //组合模式一 3 class Person{ 4 public function eat(){ 5 echo "eat.
"; 6 } 7 } 8 9 class Phone{ 10 public function call(){ 11 echo "phone call.
"; 12 } 13 } 14 15 //学生也需要call()这个方法,为了提高代码的复用性(组合) 16 class Student extends Person{ 17 private $people; 18 public function learning(){ 19 echo "learn.
"; 20 } 21 public function func($class, $method){//兼容多个类的多个方法 22 $this->people = new $class; 23 $this->people->$method(); 24 } 25 } 26 27 $student = new Student(); 28 $student->eat(); 29 $student->func('Phone', 'call'); 30 $student->learning();
模式二:
1 php 2 //组合模式二 3 class Person{ 4 public function eat(){ 5 echo "eat.
"; 6 } 7 } 8 9 trait Drive{ 10 public function call(){ 11 echo "phone call.
"; 12 } 13 } 14 15 class Student extends Person{ 16 use Drive; 17 public function learning(){ 18 echo "learn.
"; 19 } 20 } 21 22 $student = new Student(); 23 $student->eat(); 24 25 //当方法或属性同名时,当前类中的方法会覆盖 trait的 方法,而 trait 的方法又覆盖了基类中的方法 26 $student->call(); 27 $student->learning();