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94 CHAPTER 3 ■ OBJECT-ORIENTED PROGRAMMING ■ Note __CLASS__ is what’s called magic constant, which, in this case, returns the name of the class in which it is called. There are several available magic constants, which you can read more about in the PHP manual at http://us3.php.net/manual/en/language.constants.predefined.php. Reloading the file in your browser will produce the following result: The class "MyClass" was initiated! I'm a class property! End of file. To call a function when the object is destroyed, the __destruct() magic method is available. This is useful for class cleanup (closing a database connection, for instance). Output a message when the object is destroyed by defining the magic method __destruct() in MyClass:
$obj = new MyClass; // Get the value of $prop1 echo $obj->getProperty(); // Output a message at the end of the file echo "End of file."; ?> With a destructor defined, reloading the test file results in the following output: The class "MyClass" was initiated! I'm a class property! End of file. The class "MyClass" was destroyed. CHAPTER 3 ■ OBJECT-ORIENTED PROGRAMMING When the end of a file is reached, PHP automatically releases all resources that were used within it to keep memory available. This triggers the destructor for the MyClass object. To explicitly trigger the destructor, you can destroy the object using the function unset():
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THE EXPERT’S VOICE ® IN OPEN SOU
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ii Pro PHP and jQuery Copyright ©
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iv Contents at a Glance ■About th
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vi ■ CONTENTS Understanding jQuer
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viii ■ CONTENTS Summary .........
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x ■ CONTENTS ■Chapter 9: Perfor
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xii About the Author ■ Jason Leng
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xiv Acknowledgments I feel like I s
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C H A P T E R 1 ■ ■ ■ Introdu
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CHAPTER 1 ■ INTRODUCING JQUERY Th
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SETTING UP A LOCAL TESTING ENVIRONM
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google.load("jquery", "1.4.2");
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Basic Selectors CHAPTER 1 ■ INTRO
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Only one paragraph in our document
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$(".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 105 and 106: $obj = new MyClass; var_dump($obj);
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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 $filename; CHAP
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144 CHAPTER 4 ■ BUILD AN EVENTS C
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168 CHAPTER 5 ■ ADD CONTROLS TO C
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200 CHAPTER 6 ■ PASSWORD PROTECTI
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P A R T 3 ■ ■ ■ Combining jQu
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236 CHAPTER 7 ■ ENHANCING THE USE
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264 CHAPTER 8 ■ EDITING THE CALEN
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P A R T 4 ■ ■ ■ Advancing jQu
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312 CHAPTER 9 ■ PERFORMING FORM V
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C H A P T E R 10 ■ ■ ■ Extend
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$.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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