PHP/Class/ get

Enforcing property access using magic accessor methods

 
<?
class Person {
    protected $__data = array("person", "email");
    public function __get($property) {
        if (isset($this->__data[$property])) {
            return $this->__data[$property];
        } else {
            return false;
        }
    }
    public function __set($property, $value) {
        if (isset($this->__data[$property])) {
            return $this->__data[$property] = $value;
        } else {
            return false;
        }
    }
}
?>

__get( ) specifies what to do if an unknown property is read from within your script

 
<?
    class Dog {
            public $Name;
            public $DogTag;
  
            public function __get($var) {
                    print "Attempted to retrieve $var and failed...\n";
            }
    }
    $poppy = new Dog;
    print $poppy->Age;
?>

Intercepting Property Access with __get() and __set() (PHP 5 Only)

 
<?php
class TimeThing {
  function __get( $arg ) {
    if ( $arg == "time" ) {
      return getdate();
    }
  }
  function __set( $arg, $val ) {
    if ( $arg == "time" ) {
      trigger_error( "cannot set property $arg" );
      return false;
    }
  }
}
$cal = new TimeThing();
print $cal->time["mday"]."/";
print $cal->time["mon"]."/";
print $cal->time["year"];
?>