Pro PHP and jQuery by Jason Lengstorf.pdf - Computer Science ...

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102 CHAPTER 3 ■ OBJECT-ORIENTED PROGRAMMING Preserving Original Method Functionality While Overwriting Methods To add new functionality to an inherited method while keeping the original method intact, use the parent keyword with the scope resolution operator (::):
Create a new object $newobj = new MyOtherClass; // Output the object as a string echo $newobj->newMethod(); // Use a method from the parent class echo $newobj->getProperty(); ?> CHAPTER 3 ■ OBJECT-ORIENTED PROGRAMMING This outputs the result of both the parent constructor and the new class’s constructor: The class "MyClass" was initiated! A new constructor in MyOtherClass. From a new method in MyOtherClass. I'm a class property! The class "MyClass" was destroyed. Assigning the Visibility of Properties and Methods For added control over objects, methods and properties are assigned visibility. This controls how and from where properties and methods can be accessed. There are three visibility keywords: public, protected, and private. In addition to its visibility, a method or property can be declared as static, which allows them to be accessed without an instantiation of the class. ■ Note Visibility is a new feature as of PHP 5. For information on OOP compatibility with PHP 4, see the PHP manual page at http://us2.php.net/manual/en/language.oop5.php. Public Properties and Methods All the methods and properties you’ve used so far have been public. This means that they can be accessed anywhere, both within the class and externally. 103
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THE EXPERT’S VOICE ® IN OPEN SOU
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ii Pro PHP and jQuery Copyright ©
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iv Contents at a Glance ■About th
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vi ■ CONTENTS Understanding jQuer
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viii ■ CONTENTS Summary .........
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x ■ CONTENTS ■Chapter 9: Perfor
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xii About the Author ■ Jason Leng
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xiv Acknowledgments I feel like I s
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C H A P T E R 1 ■ ■ ■ Introdu
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CHAPTER 1 ■ INTRODUCING JQUERY Th
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SETTING UP A LOCAL TESTING ENVIRONM
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google.load("jquery", "1.4.2");
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Basic Selectors CHAPTER 1 ■ INTRO
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Only one paragraph in our document
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$(".foo+p"); CHAPTER 1 ■ INTRODUC
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$("p:odd"); [ p.foo, p#bar ] Select
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$("p:parent"); [ p, p.foo, p, p#bar
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which returns the following in the
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Selecting Only Enabled or Disabled
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26 CHAPTER 2 ■ COMMON JQUERY ACTI
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Page 139 and 140: # # DocumentRoot: The directory out
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Page 143 and 144: } ?> } } } CHAPTER 4 ■ BUILD AN E
Page 145 and 146: ■ Note For the sake of brevity, D
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Page 149 and 150: } ?> } include_once $filename; CHAP
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152 CHAPTER 4 ■ BUILD AN EVENTS C
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168 CHAPTER 5 ■ ADD CONTROLS TO C
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200 CHAPTER 6 ■ PASSWORD PROTECTI
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P A R T 3 ■ ■ ■ Combining jQu
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236 CHAPTER 7 ■ ENHANCING THE USE
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264 CHAPTER 8 ■ EDITING THE CALEN
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P A R T 4 ■ ■ ■ Advancing jQu
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312 CHAPTER 9 ■ PERFORMING FORM V
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C H A P T E R 10 ■ ■ ■ Extend
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$.validDate = function(date, option
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Modifying the Initialization Script
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Adding Methods to jQuery CHAPTER 10
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over, then returns it to its origin
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CHAPTER 10■ EXTENDING JQUERY ■
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Defines default values for the plug
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}); // Loads the event data from th
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■ ■ ■ Index ■ Special Chara
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■ C Calendar app JavaScript initi
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saving new calendar events in addin
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:eq( ) method, 17, 20, 26-27 equals
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eginning of string, 324 character c
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asic selectors in by class name, 12
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.die( ) method, 75-76 .error( ) met
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.parents( ) method, 33 .parentsUnti
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overview, 328 regex pattern to vali
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