Special class value in PHP - php

Question

Some code:
class MyClass
{
public function __get($key)
{
return $this[$key];
}
public function __set($key, $value)
{
$this[$key] = $value;
}
}
$m = new MyClass();
$m->name = 'This is my class.';
OR
$m['name'] = 'This is my class.';
But not working. Somebody can help me?

Answer 1

In order to be able to access values in your class using array access, you have to implement the ArrayAccess interface. In order to also arbitrary property names dynamically, copy the sample code from that page. Once you've implemented the ArrayAccess methods your __get and __set will work as-is.
<?php
class obj implements arrayaccess {
private $container = array();
public function __construct() {
$this->container = array(
"one" => 1,
"two" => 2,
"three" => 3,
);
}
public function offsetSet($offset, $value) {
if (is_null($offset)) {
$this->container[] = $value;
} else {
$this->container[$offset] = $value;
}
}
public function offsetExists($offset) {
return isset($this->container[$offset]);
}
public function offsetUnset($offset) {
unset($this->container[$offset]);
}
public function offsetGet($offset) {
return isset($this->container[$offset]) ? $this->container[$offset] : null;
}
public function __get($key) {
return $this[$key];
}
public function __set($key, $value) {
$this[$key] = $value;
}
}
$foo = new obj();
$foo->pill = 123;
var_dump($foo->pill);

Answer 2

The problem you are having is that inside the __get and __set methods, you are accessing the properties as an array. You need to use $this->$key instead of $this[$key].
class MyClass
{
public function __get($key)
{
return $this->$key;
}
public function __set($key, $value)
{
$this->$key = $value;
}
}
$m = new MyClass();
echo "before set: \n";
var_dump($m);
$m->foo = "bar";
echo "after set: \n";
var_dump($m);
Example: http://codepad.viper-7.com/oNLbzq

Answer 3

Try this approach
class MyClass
{
private $m_var_data = array();
public function __set($p_name, $p_value)
{
$this->m_var_data[$p_name] = $p_value;
}
public function __get($p_name)
{
if (array_key_exists($p_name, $this->m_var_data))
{
return $this->m_var_data[$p_name];
}
}
}
$m = new MyClass();
$m->name = 'This is my class.';

Answer 4

In order to create a new property, you should do this:
class MyClass
{
private $data = array();
public function __set($name, $value)
{
echo "Setting '$name' to '$value'\n";
$this->data[$name] = $value;
}
public function __get($name)
{
echo "Getting '$name'\n";
if (array_key_exists($name, $this->data)) {
return $this->data[$name];
}
}
}
Then you can overload properties as you want in your example.
This link can give you more references:
http://www.php.net/manual/pt_BR/language.oop5.overloading.php#language.oop5.overloading.members