I am using a magic getter/setter class for my session variables, but I don't see any difference between normal setters and getters.
The code:
class session
{
public function __set($name, $value)
{
$_SESSION[$name] = $value;
}
public function __unset($name)
{
unset($_SESSION[$name]);
}
public function __get($name)
{
if(isset($_SESSION[$name]))
{
return $_SESSION[$name];
}
}
}
Now the first thing I noticed is that I have to call $session->_unset('var_name')
to remove the variable, nothing 'magical' about that.
Secondly when I try to use $session->some_var
this does n开发者_Go百科ot work. I can only get the session variable using $_SESSION['some_var']
.
I have looked at the PHP manual but the functions look the same as mine.
Am I doing something wrong, or is there not really anything magic about these functions.
First issue, when you call
unset($session->var_name);
It should be the same as calling
$session->_unset('var_name');
Regarding not being able to use __get(); What doesn't work? What does the variable get set to and what warnings are given. Ensure you have set error_reporting()
to E_ALL.
It may also be a good idea to check you have called session_start
I thought getters and setters were for variables inside the class?
class SomeClass {
private $someProperty;
function __get($name) {
if($name == 'someProperty') return $this->someProperty;
}
function __set($name, $value) {
if($name == 'someProperty') $this->someProperty = $value;
}
}
$someClass = new SomeClass();
$someClass->someProperty = 'value';
echo $someClass->someProperty;
?
class session { /* ...as posted in the question ... */ }
session_start();
$s = new session;
$s->foo = 123;
$s->bar = 456;
print_r($_SESSION);
unset($s->bar);
print_r($_SESSION);
prints
Array
(
[foo] => 123
[bar] => 456
)
Array
(
[foo] => 123
)
Ok, maybe not "magical". But works as intended.
If that's not what you want please elaborate...
This is my understanding till now about magic function
Please correct me if i am wrong...
$SESSION is an array and not an Object therefore you can access them using $session['field'] and not $session->field
magic Function allow you to use the function name __fnName before any function as
fnNameNewField($value);
so ,it will be separated into NewField as key and will be sent to __fnName and oprations will be done on this
eg: setNewId($value) will be sent to __set() with key= new_id and Parameters...
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