PHP通过var名称设置数据

Question

I have class

class User extends BaseModel{
     public $id;
     public $name;
}

class BaseModel{
     function __construct($data=null){
          if($data!=null)
          //set $id and $name
     }
}

I would like to set $id , $name and any other data that extends BaseModel by calling

$test = new User(array('id'=>1,'name'=>'user name'))

I tried to use

$this->__set($arrayKey,$arrayValue);

But i got error : Fatal error: Call to undefined method User::__set() What am I doing wrong? Thank you for any help.

Answer 1

Just loop through the data and assign each property:

class BaseModel {
     function __construct($data = NULL) {
          foreach ((array) $data as $k => $v) {
              $this->$k = $v;
          }
     }
}

The reason you got the error about __set() not being defined is because you didn't define it. Although __set() is a magic method, you do still have to define it's behavior if you want to do something with it.

http://www.php.net/manual/en/language.oop5.overloading.php#object.set

__set is run when writing data to inaccessible properties

This means if you try to "set" a class variable in a scope you're not allowed to (like a private or protected variable), this function will run.

class Test {
    private $var;
}

$c = new Test;
$c->var = 1; // Error, or call __set if defined