php里面的traits技术下部(系列篇)

as可以修改traits里面方法的可见性

<?php
trait tA {
  public function aa(){
    echo "<p>tA:aa...</p>";
  }
  public function bb(){
    echo "<p>tA:bb...</p>";
  }
  public function ok(){
    echo "<p>tA:ok...</p>";
  }
}
trait tB {
  public function cc(){
    echo "<p>tB:cc...</p>";
  }
  public function dd(){
    echo "<p>tB:dd...</p>";
  }
  public function ok(){
    echo "<p>tB:ok...</p>";
  }
}
//抽象类
abstract class Humanity {
  public $name;
  public $sex;
  public $iq=10;
  const BIRTHPLACE='地球';
  static public $counter=0;//静态属性，它是公共的资源和具体的实例没有关系
  //构造函数
  public function __construct($name,$sex){
    self::$counter++;
    $this->name=$name;
    $this->sex=$sex;
  }
  protected function chew($food){
    echo "<p>{$food}已经被咀嚼完成！</p>";
  }
  //抽象方法
  abstract public function eat($food);
  static public function hello(){
    echo '<p>您好！我是来自'.self::BIRTHPLACE.'的人类</p>';
  }
}
class Student extends Humanity {
  const BIRTHPLACE='火星';
  public $studentId;
  public function test($subject){
    echo "<p>{$this->name}正在考{$subject}！</p>";
  }
  public function eat($food){
    $this->chew($food);
    echo "<p>{$this->name}正在快速的吃{$food}！</p>";
  }
  use tA,tB
  {
    tA::OK insteadof tB;
    tB::ok as okTb;
    aa as private;
    bb as private bbPrivate;
  }
}

abstract class Dog {

}
class Huskies extends Dog {
  use tA,tB {
    tB::ok insteadof tA;
  }
}
$hanMM=new Student('韩梅梅','女');
$hanMM->bbPrivate();

解析：

tA语法糖里面的ok方法替换掉tB里面的ok方法。

tB语法糖里面的ok方法改名为okTb。

aa方法把修饰符替换成私有性private。

把bb方法改名为bbPrivate，并把修饰符改成private.

在trait里面使用其他trait

<?php
trait tA {
  public function aa(){
    echo "<p>tA:aa...</p>";
  }
  public function bb(){
    echo "<p>tA:bb...</p>";
  }
  public function ok(){
    echo "<p>tA:ok...</p>";
  }
}
trait tB {
  public function cc(){
    echo "<p>tB:cc...</p>";
  }
  public function dd(){
    echo "<p>tB:dd...</p>";
  }
  public function ok(){
    echo "<p>tB:ok...</p>";
  }
}
trait tC
{
  use tA,tB
  {
    tA::ok insteadof tB;
  }
}
//抽象类
abstract class Humanity {
  public $name;
  public $sex;
  public $iq=10;
  const BIRTHPLACE='地球';
  static public $counter=0;//静态属性，它是公共的资源和具体的实例没有关系
  //构造函数
  public function __construct($name,$sex){
    self::$counter++;
    $this->name=$name;
    $this->sex=$sex;
  }
  protected function chew($food){
    echo "<p>{$food}已经被咀嚼完成！</p>";
  }
  //抽象方法
  abstract public function eat($food);
  static public function hello(){
    echo '<p>您好！我是来自'.self::BIRTHPLACE.'的人类</p>';
  }
}
class Student extends Humanity {
  const BIRTHPLACE='火星';
  public $studentId;
  public function test($subject){
    echo "<p>{$this->name}正在考{$subject}！</p>";
  }
  public function eat($food){
    $this->chew($food);
    echo "<p>{$this->name}正在快速的吃{$food}！</p>";
  }
  use tC;
}
abstract class Dog {

}
class Huskies extends Dog {
  use tC;
}
$hanMM=new Student('韩梅梅','女');
$hanMM->cc();

解析：

tC里面有两个语法糖(有六个方法)，先替换掉冲突的ok不然会报错，然后输出即可（算是tC有六个方法）.

语法糖里面有抽象方法怎么做？(实现)

<?php
header('Content-Type:text/html;charset=utf-8');
//trait里面可以有抽象方法
trait tA {
  public function aa(){
    echo "<p>tA:aa...</p>";
  }
  public function bb(){
    echo "<p>tA:bb...</p>";
  }
  abstract public function ok();
}
//抽象类
abstract class Humanity {
  public $name;
  public $sex;
  public $iq=10;
  const BIRTHPLACE='地球';
  static public $counter=0;//静态属性，它是公共的资源和具体的实例没有关系
  //构造函数
  public function __construct($name,$sex){
    self::$counter++;
    $this->name=$name;
    $this->sex=$sex;
  }
  protected function chew($food){
    echo "<p>{$food}已经被咀嚼完成！</p>";
  }
  //抽象方法
  abstract public function eat($food);
  static public function hello(){
    echo '<p>您好！我是来自'.self::BIRTHPLACE.'的人类</p>';
  }
}
class Student extends Humanity {
  const BIRTHPLACE='火星';
  public $studentId;
  public function test($subject){
    echo "<p>{$this->name}正在考{$subject}！</p>";
  }
  public function eat($food){
    $this->chew($food);
    echo "<p>{$this->name}正在快速的吃{$food}！</p>";
  }
  use tA;
  public function ok(){

  }
}
abstract class Dog {

}
class Huskies extends Dog {
  use tA;
  public function ok(){

  }
}
$hanMM=new Student('韩梅梅','女');
$hanMM->aa();

解析：

重写ok方法，不然会报错。