PHP Objects, Patterns and Practice (3rd edition)
CHAPTER 4 ■ ADVANCED FEATURES When a client attempts to access an undefined property, the get() method is invoked. I have implem ...
CHAPTER 4 ■ ADVANCED FEATURES } In this example I work with “setter” methods rather than “getters.” If a user attempts to assign ...
CHAPTER 4 ■ ADVANCED FEATURES function writeAge( Person $p ) { print $p->getAge()."\n"; } } I could, of course, subclass this ...
CHAPTER 4 ■ ADVANCED FEATURES Defining Destructor Methods You have seen that the construct() method is automatically invoked whe ...
CHAPTER 4 ■ ADVANCED FEATURES Copying Objects with __clone() In PHP 4, copying an object was a simple matter of assigning from o ...
CHAPTER 4 ■ ADVANCED FEATURES function __clone() { $this->id = 0; } } When clone is invoked on a Person object, a new shallow ...
CHAPTER 4 ■ ADVANCED FEATURES $person2 = clone $person; // give $person some money $person->account->balance += 10; // $pe ...
CHAPTER 4 ■ ADVANCED FEATURES function getAge() { return 44; } function __toString() { $desc = $this->getName(); $desc .= " ( ...
CHAPTER 4 ■ ADVANCED FEATURES } } This code is designed to run my various callbacks. It consists of two classes. Product simply ...
CHAPTER 4 ■ ADVANCED FEATURES elegant way of creating anonymous functions? Well since PHP 5.3 there is a much better way of doin ...
CHAPTER 4 ■ ADVANCED FEATURES class Totalizer { static function warnAmount() { return function( $product ) { if ( $product->p ...
CHAPTER 4 ■ ADVANCED FEATURES shoes: processing count: 6 coffee: processing count: 12 high price reached: 12 This demonstrates t ...
C H A P T E R 5 ■ ■ ■ Object Tools As we have seen, PHP supports object-oriented programming through language constructs such as ...
CHAPTER 5 ■ OBJECT TOOLS that this is unlikely. After all, all you have to do is remember to give all your classes unique names, ...
CHAPTER 5 ■ OBJECT TOOLS So, what are they? In essence a namespace is a bucket in which you can place your classes, functions an ...
CHAPTER 5 ■ OBJECT TOOLS PHP Fatal error: Class 'main\com\getinstance\util\Debug' not found in .../listing5.04.php o n line 12 T ...
CHAPTER 5 ■ OBJECT TOOLS use com\getinstance\util\Debug as uDebug; class Debug { static function helloWorld() { print "hello fro ...
CHAPTER 5 ■ OBJECT TOOLS } } } namespace main { \com\getinstance\util\Debug::helloWorld(); } If you must combine multiple namesp ...
CHAPTER 5 ■ OBJECT TOOLS ■Note require() and require_once() are actually statements, not functions. This means that you can omit ...
CHAPTER 5 ■ OBJECT TOOLS As far as PHP is concerned, there is nothing special about this structure. You are simply placing libra ...
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