php自动setter和getter

Question

I'm trying to implement some automated getter and setter for php objects.

My target is to automatically have for each properties the methods getProperty() and setProperty(value) , that way if the method is not implemented for a property the script will simply set or get the value.

An example, to make myself clear:

class Foo {
    public $Bar;
}

$A = new A();
$A->setBar("bar");
$A->getBar(); // -> output "bar"

or

class Foo {
    public $Bar;
    public function setBar($bar) { $Bar = $bar; }
    public function getBar($bar) { return 'the value is: ' . $bar; }
}

$A = new A();
$A->setBar("bar");
$A->getBar(); // -> output "the value is: bar"

Any idea/hints on how to accomplish this?

Answer 1

If you want to simulate the getXy and setXy functions for arbitrary properties, then use the magic __call wrapper:

function __call($method, $params) {

     $var = lcfirst(substr($method, 3));

     if (strncasecmp($method, "get", 3) === 0) {
         return $this->$var;
     }
     if (strncasecmp($method, "set", 3) === 0) {
         $this->$var = $params[0];
     }
}

This would be a good opportunity to do something useful for once, by adding a typemap or anything. Otherwise eschewing getters and setters alltogether might be advisable.

Answer 2

read the magic functions of php and your need you can use __get and __set functions

read this