PHP Tutorials - Herong's Tutorial Examples - v5.17, by Herong Yang
What Is an Overloaded Method
This section describes what is an overloaded method - A static method or an instance method that is not directly declared at all or not declared as publicly accessible, but it is indirectly provided through the implementation of the __call() or the __callStatic() method.
What Is an Overloaded Method? An overloaded method is a static method or an instance method that is not directly declared at all or not declared as publicly accessible, but it is indirectly provided through the implementation of the __call() or the __callStatic() method.
In PHP, any class can implement the following special methods to support overloaded methods:
For example, the following tutorial example provides class "MyPizzaOrder" that shows how to use __call() method to support overloaded methods.
<?php /* MyPizzaOrder.php #- Copyright 2015 (c) HerongYang.com. All Rights Reserved. */ class MyPizzaOrder { private $size = 0; private $toppings = array(); public function __call($name, $arguments) { if (substr($name,0,3) == "add") { $value = substr($name,3); array_push($this->toppings, $value); } else { echo "ERROR: Method ".$name."() not supported.\n"; } } public function setSize($size) { $this->size = $size; } public function showOrder() { echo " Size: ". $this->size ."\n"; echo " Toppings: ". implode(",",$this->toppings) ."\n"; } } $order = new MyPizzaOrder(); $order->setSize("Large"); $order->addSausage(); $order->addBacon(); $order->addOnions(); $order->addMushrooms(); $order->addPepperoni(); echo "MyPizzaOrder object: \n"; $order->showOrder(); $order->noCheese(); ?>
If you run the above tutorial example, you will get something like this:
herong> \php\php MyPizzaOrder.php MyPizzaOrder object: Size: Large Toppings: Sausage,Bacon,Onions,Mushrooms,Pepperoni ERROR: Method noCheese() not supported.
Table of Contents
Introduction and Installation of PHP
PHP Data Types and Data Literals
Variables, References, and Constants
Expressions, Operations and Type Conversions
Conditional Statements - "if" and "switch"
Loop Statements - "while", "for", and "do ... while"
Function Declaration, Arguments, and Return Values
Interface with Operating System
►Introduction of Class and Object
What Is a Superclass and a Subclass
What Is an Overloaded Property
What Is Object Property Iteration
Updating Variables Who Share an Object
Passing Objects as Function Arguments
Integrating PHP with Apache Web Server
Retrieving Information from HTTP Requests
Creating and Managing Sessions in PHP Scripts
Sending and Receiving Cookies in PHP Scripts
Controlling HTTP Response Header Lines in PHP Scripts
MySQL Server Connection and Access Functions
Functions to Manage Directories, Files and Images
SOAP Extension Function and Calling Web Services
SOAP Server Functions and Examples
Localization Overview of Web Applications
Using Non-ASCII Characters in HTML Documents
Using Non-ASCII Characters as PHP Script String Literals
Receiving Non-ASCII Characters from Input Forms
"mbstring" Extension and Non-ASCII Encoding Management
Managing Non-ASCII Character Strings with MySQL Servers
Parsing and Managing HTML Documents
Configuring and Sending Out Emails
Managing PHP Engine and Modules on macOS