php里面traits技术上部(系列篇）

 public function aa() { echo "
		

			aaa....
		
"; } public function bb(){ echo "
		

			bb...
		
"; } } abstract class Humanity { public $name; public $sex; public $iq=10; const BIRTHPLACE="地球"; static public $counter=0; public function __construct($name,$sex) { self::$counter++; $this->name=name; $this->sex=$sex; } protected function chew($food) { echo "
		

			{$food}已经被咀嚼完成！
		
"; } abstract public function eat($food); static public function hello() { echo '
		

			您好！我是来自'.self::BIRTHPLACE.'的人类
		
'; } } class Student extends Humanity { const BIRTHPLACE='火星'; public $studentId; public function test($subject) { echo "
		

			{$this->name}正在考{$subject}！
		
"; } public function eat($food) { $this->chew($food); echo "
		

			{$this->name}正在快速的吃{$food}！
		
"; } use tA;//相当于 /*public function aa()
	{
		echo "
		

			aaa....
		
";
	}
	public function bb(){
		echo "
		

			bb...
		
";
	}*/ } abstract class Dog { } class huskies extends Dog { use tA; //相当于 /*public function aa()
	{
		echo "
		

			aaa....
		
";
	}
	public function bb(){
		echo "
		

			bb...
		
";
	}*/ } $hanMM=new Student('韩梅梅','女'); $hanMM->aa(); $wW=new Huskies(); $wW->bb(); 

解析：

use tA;相当于

public function aa() { echo "
		

			aaa....
		
"; } public function bb(){ echo "
		

			bb...
		
"; } 

traits技术的基本使用技巧是：他是作用的引入一段《《《代码》》》。 效果图：

优先级：

 public function aa(){ echo "
		

			tA:aa...
		
"; } public function bb(){ echo "
		

			tA:bb...
		
"; } } //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 "
		

			{$food}已经被咀嚼完成！
		
"; } //抽象方法 abstract public function eat($food); static public function hello(){ echo '
		

			您好！我是来自'.self::BIRTHPLACE.'的人类
		
'; } public function aa(){ echo "
		

			Humanity:aa...
		
"; } } class Student extends Humanity { const BIRTHPLACE='火星'; public $studentId; public function test($subject){ echo "
		

			{$this->name}正在考{$subject}！
		
"; } public function eat($food){ $this->chew($food); echo "
		

			{$this->name}正在快速的吃{$food}！
		
"; } public function aa(){ echo "
		

			Student:aa...
		
"; } use tA; } abstract class Dog { } class Huskies extends Dog { use tA; } $hanMM=new Student('韩梅梅','女'); $hanMM->aa(); 

解析：

本类定义的优先级比语法糖traits定义的优先级高，为什么呢？ 因为有一定的层级关系：

父类里面的同名方法<traits里面的同名方法<本类里面的同名方法

一个文件定义多个语法糖：

 public function aa(){ echo "
		

			tA:aa...
		
"; } public function bb(){ echo "
		

			tA:bb...
		
"; } } trait tB { public function cc(){ echo "
		

			tB:cc...
		
"; } public function dd(){ echo "
		

			tB:dd...
		
"; } } //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 "
		

			{$food}已经被咀嚼完成！
		
"; } //抽象方法 abstract public function eat($food); static public function hello(){ echo '
		

			您好！我是来自'.self::BIRTHPLACE.'的人类
		
'; } public function aa(){ echo "
		

			Humanity:aa...
		
"; } } class Student extends Humanity { const BIRTHPLACE='火星'; public $studentId; public function test($subject){ echo "
		

			{$this->name}正在考{$subject}！
		
"; } public function eat($food){ $this->chew($food); echo "
		

			{$this->name}正在快速的吃{$food}！
		
"; } public function aa(){ echo "
		

			Student:aa...
		
"; } use tA,tB; } abstract class Dog { } class Huskies extends Dog { use tA; } $hanMM=new Student('韩梅梅','女'); $hanMM->aa(); 

问题：
一次性使用多个trait，如果不提trait里面有同名的方法怎么解决这个冲突呢？

 public function aa(){ echo "
		

			tA:aa...
		
"; } public function bb(){ echo "
		

			tA:bb...
		
"; } public function ok(){ echo "
		

			tA:ok...
		
"; } } trait tB { public function cc(){ echo "
		

			tB:cc...
		
"; } public function dd(){ echo "
		

			tB:dd...
		
"; } public function ok(){ echo "
		

			tB: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 "
		

			{$food}已经被咀嚼完成！
		
"; } //抽象方法 abstract public function eat($food); static public function hello(){ echo '
		

			您好！我是来自'.self::BIRTHPLACE.'的人类
		
'; } public function aa(){ echo "
		

			Humanity:aa...
		
"; } } class Student extends Humanity { const BIRTHPLACE='火星'; public $studentId; public function test($subject){ echo "
		

			{$this->name}正在考{$subject}！
		
"; } public function eat($food){ $this->chew($food); echo "
		

			{$this->name}正在快速的吃{$food}！
		
"; } public function aa(){ echo "
		

			Student:aa...
		
"; } use tA,tB { tA::ok insteadof tB; tB::ok as okTb; } } abstract class Dog { } class Huskies extends Dog { use tA,tB { tB::ok insteadof tA; } } $hanMM=new Student('韩梅梅','女'); $hanMM->ok(); $hanMM->okTb(); $wW=new Huskies(); $wW->ok(); 

解析一：

use tA,tB { tA::ok insteadof tB; tB::ok as okTb; } 

tA里面的ok方法替换掉tB里面的ok方法，tB里面的ok函数改成okTb函数

解析二：

use tA,tB { tB::ok insteadof tA; } 

tB里面的ok方法替换掉tA里面的ok方法