About PHP _set () and _get ()
It is said on the net that these two functions are used for private variables, is this not a violation of the encapsulation of classes?
Why sometimes use $this-> $varName, sometimes such $this->varname is to want not "$" ah???
If you have time, help me to see where my code is wrong:
Class MyClass
{
Private $Age;
Private $Grade;
Public function __construct ($name)
{
$this->myname = $name;
$this->age = 5;
}
Public Function _get ($property _name)
{
Echo ' Access to _get ()
';
if (Isset ($property _name))
{
return $this $property _name;
}
}
Public Function _set ($property _name, $value)
{
Echo ' Access to _set ()
';
$this $property _name = $value;
}
}
$obj = new MyClass (' Tom ');
$obj->age = 23;//said this wrong $obj $Age is also an error
?>
------Solution--------------------
The error is not out of the $ there.
First you define a class private member variable, which can only be called within the class itself.
$obj->age = 23; obviously cannot be called because the permission is not enough, external prohibit call.
$obj-$Age = 23; It is also wrong, first of all, PHP will automatically recognize your $age discovery is empty, and plainly equivalent to $obj->=23;
To change the code for you, it is estimated that you understand that at the moment you do not understand the class variable invocation level.
PHP Code
MyName = $name; $this->age = 5;} Public Function _get ($property _name) {echo ' Access _get ()
'; if (Isset ($property _name)) {return $this, $property _name;}} Public Function _set ($property _name, $value) {echo ' Access _set ()
'; $this $property _name = $value;}} $obj = new MyClass (' Tom ');//$obj->age = at $obj->_set (' Age ', ' "Hello World"), Echo $obj->_get (' age '); $Age = ' Test '; $obj $Age = ' Hello Difa '; echo $obj->test;
