--- Section 11--Reloading

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Section 11--Overloading
PHP4 already has overloading syntax to establish mapping to external object models, just like Java and COM. PHP5 brings powerful object-oriented Overloading allows programmers to create custom behaviors to access properties and call methods.
Overloading can be performed through several special methods __get, __set, and __call. When the Zend engine tries to access a member and does not find it, PHP These methods will be called.
In Example 6.14, __get and __set replace all accesses to the attribute variable array. If necessary, you can implement any type of filtering you want. For example, the script can disable setting attribute values ​​at the beginning Use a certain prefix or contain a certain type of value. The __call method explains how you call an undefined method. When you call an undefined method, the method name and the parameters received by the method will be passed to the __call method, and PHP passes_ The value of _call is returned to the undefined method.
Listing 6.14 User-level overloading

Copy the code The code is as follows:

class Overloader
{
private $proper ties = array();
function __get($property_name)                                                                                                                [$property_name]);
                                                                                                      NULL);
                                                                                                                                                                       value;
         }                                                                                                                                ("Invoking $function_name()
n");                                                                                  
}
$o = new Overloader();
//invoke __set() assigns a value to a non-existent attribute variable and activates __set()
$o->dynaProp = "Dynamic Content";
//invoke __get() activates __get()
print($ o->dynaProp . "
n");
//invoke __call() Activate __call()
$o->dynaMethod("Leon", "Zeev");
?>

The above has introduced --- Section 11 -- Overloading, including --- aspects. I hope it will be helpful to friends who are interested in PHP tutorials.