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PHP中的$this用法

Jun 06, 2016 pm 07:50 PM
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欢迎进入Linux社区论坛,与200万技术人员互动交流 >>进入 this是指向当前对象的指针[php] view plaincopyprint? class human{ public $name="李四"; public function eat(){ echo $this-name,'在吃饭'; } public function test(){ echo $name,'在吃饭'; } }

欢迎进入Linux社区论坛,与200万技术人员互动交流 >>进入

  this是指向当前对象的指针[php] view plaincopyprint?

  class human{

  public $name="李四";

  public function eat(){

  echo $this->name,'在吃饭';

  }

  public function test(){

  echo $name,'在吃饭';

  }

  }

  $li=new human();

  echo $li->name;//李四

  $li->eat();//李四在吃饭。

  /*

  和java,c++相比

  方法体内想访问调用者的属性,必须用$this

  如果不加,则理解为方法内部的一个局部变量.

  */

  $li->test();//Notice: Undefined variable: name in C:\wamp\www\php\this.php on line 14

  /******

  从生活中的角度来理解$this

  女娲造人时, 造了一个"悔恨"的方法

  {

  抓[自己]头发

  抽 [自己] 脸

  }

  世界上的人那么多,

  悔恨时,抓谁的头发?

  抽谁的脸?

  张三,李四? 王五? 都不能说明合理的情况

  只能理解为"自己"

  ******/

  ?>

  class human{

  public $name="李四";

  public function eat(){

  echo $this->name,'在吃饭';

  }

  public function test(){

  echo $name,'在吃饭';

  }

  }

  $li=new human();

  echo $li->name;//李四

  $li->eat();//李四在吃饭。

  /*

  和java,c++相比

  方法体内想访问调用者的属性,必须用$this

  如果不加,则理解为方法内部的一个局部变量.

  */

  $li->test();//Notice: Undefined variable: name in C:\wamp\www\php\this.php on line 14

  /******

  从生活中的角度来理解$this

  女娲造人时, 造了一个"悔恨"的方法

  {

  抓[自己]头发

  抽 [自己] 脸

  }

  世界上的人那么多,

  悔恨时,抓谁的头发?

  抽谁的脸?

  张三,李四? 王五? 都不能说明合理的情况

  只能理解为"自己"

  ******/

  ?>

PHP中的$this用法

PHP中的$this用法

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