method_missing.php

<?php 

class Person {

  public $name , $age , $doc_num;

	protected $cpf;

	public function __set($property, $value) {
		return $this->setOrGetIfPropertyExists($property, $value);
	}

	public function __get($attr) {
		return $this->setOrGetIfPropertyExists($attr , null, true);
	}
	public function __call($method,$value){
		if(preg_match_all("/^(s|g)et([A-Z]{1}[A-z]+)$/" , $method , $matches)) {
			return $this->setOrGetIfPropertyExists(array_shift($matches[2]), $value , preg_match("/^g{1}/",$method) != 0);
		}
		return NULL;
	}

	// not the best name for function ,but that's ok
	private function setOrGetIfPropertyExists($property , $value , $get=false) {
		if(property_exists($this, $property = strtolower($property))) {
			return ($get ? $this->$property : $this->$property = is_array($value) ? array_shift($value) : $value);
		}
		return NULL ;

	}
}


$person = new Person();

$person->setAge(22); // valid
$person->setage(20); // not valid (capital letter after 'set')
$person->setCPF('***.***.***-**'); // valid
$person->setDoc_Num('123,456,890'); // valid
$person->setdoc_Num('2123,456,890'); // invalid (the first letter must be a capital after set or get)
$person->name = 'Rafael F.';

print_r(sprintf("<pre>%s<br/>%s<br/>%s<br/></pre><br />" , 
	$person->getAge() , 
	$person->getCPF()	, 
	$person->setCPF('123.456.789-10')
));

print_r("<pre>") && print_r($person) && print_r("</pre>");

?>

22
_..**-_*
123.456.789-10

Person Object
(
[name] => Rafael F.
[age] => 22
[doc_num] => 123,456,890
[cpf:protected] => 123.456.789-10
)