我不是PHP开发人员，所以我想知道在PHP中使用显式getter/setter的优点和缺点是什么，在纯OOP风格中，带有私有字段(我喜欢的方式):
class MyClass {
private $firstField;
private $secondField;
public function getFirstField() {
return $this->firstField;
}
public function setFirstField($x) {
$this->firstField = $x;
}
public function getSecondField() {
return $this->secondField;
}
public function setSecondField($x) {
$this->secondField = $x;
}
}
或者只是公共字段:
class MyClass {
public $firstField;
public $secondField;
}
class MyClass {
private $firstField;
private $secondField;
private $thirdField;
public function __get( $name ) {
if( method_exists( $this , $method = ( 'get' . ucfirst( $name ) ) ) )
return $this->$method();
else
throw new Exception( 'Can\'t get property ' . $name );
}
public function __set( $name , $value ) {
if( method_exists( $this , $method = ( 'set' . ucfirst( $name ) ) ) )
return $this->$method( $value );
else
throw new Exception( 'Can\'t set property ' . $name );
}
public function __isset( $name )
{
return method_exists( $this , 'get' . ucfirst( $name ) )
|| method_exists( $this , 'set' . ucfirst( $name ) );
}
public function getFirstField() {
return $this->firstField;
}
protected function setFirstField($x) {
$this->firstField = $x;
}
private function getSecondField() {
return $this->secondField;
}
}
$obj = new MyClass();
echo $obj->firstField; // works
$obj->firstField = 'value'; // works
echo $obj->getFirstField(); // works
$obj->setFirstField( 'value' ); // not works, method is protected
echo $obj->secondField; // works
echo $obj->getSecondField(); // not works, method is private
$obj->secondField = 'value'; // not works, setter not exists
echo $obj->thirdField; // not works, property not exists
isset( $obj->firstField ); // returns true
isset( $obj->secondField ); // returns true
isset( $obj->thirdField ); // returns false
准备好了!
There are many ways to create sourcecode in a netbeans-convention. This is nice. It makes thinks such easyer === FALSE. Just use the traditionel, specially if you are not sure which one of the properties should be encapsuled and which one not. I know, it is a boi.... pla... code, but for debugging-works and many other thinks it is the better, clear way. Dont spend to much time with thousend of arts how to make simple getters and setters. You cannot implement too some design patterns like the demeter-rule and so on, if you use magics. In specific situation you can use magic_calls or for small, fast and clear solutions. Sure you could make solutions for design-patters in this way too, but why to make you live more difficult.
