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

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40 CHAPTER 2 ■ COMMON JQUERY ACTIONS AND METHODS Changes made with JavaScript can be saved on the server through the use of AJAX (which you’ll learn about later in this chapter), which allows JavaScript to interface with server-side languages such as PHP. ■ Note After performing the examples in each of the following sections, refresh your page so each new example is starting with a fresh copy of the example HTML file. .append() and .prepend() The .append() and .prepend() functions will attach the elements passed as arguments to the jQuery object to which they are chained. The only difference is that .append() attaches the elements at the end, and .prepend() attaches at the beginning. The content will be appended or prepended inside the matched elements, meaning if you match all paragraphs on the page and append a new sentence, “This was added by jQuery”, it will be appended inside the closing paragraph tag (). Try this out by entering the following code into your console: $("p").append(" This was added by jQuery."); Executing the code will add this sentence to the end of each paragraph inside the closing paragraph tag. This is evident because the text is not knocked to the next line, as it would be if it were outside the closing tag.
CHAPTER 2 ■ COMMON JQUERY ACTIONS AND METHODS INSPECTING HTML USING THE ELEMENT INSPECTOR IN FIREBUG You can also see this by using the element inspection tool provided by Firebug. Near the top left of the console, there's a button that looks like a mouse cursor over a rectangle (see Figure 2-3). Click it to activate the element inspector. Figure 2-3. The button to activate the element inspector After the inspector is active, you can hover over different elements in the browser, and they'll highlight with a blue outline. Hover over one of the paragraphs you just appended text to, and click it. This brings up the HTML panel of Firebug with the current element collapsed and highlighted, and a tab to expand the element (see Figure 2-4). 41
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THE EXPERT’S VOICE ® IN OPEN SOU
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ii Pro PHP and jQuery Copyright ©
Page 6 and 7: iv Contents at a Glance ■About th
Page 8 and 9: vi ■ CONTENTS Understanding jQuer
Page 10 and 11: viii ■ CONTENTS Summary .........
Page 12 and 13: x ■ CONTENTS ■Chapter 9: Perfor
Page 14 and 15: xii About the Author ■ Jason Leng
Page 16 and 17: xiv Acknowledgments I feel like I s
Page 19 and 20: C H A P T E R 1 ■ ■ ■ Introdu
Page 21 and 22: CHAPTER 1 ■ INTRODUCING JQUERY Th
Page 23 and 24: SETTING UP A LOCAL TESTING ENVIRONM
Page 25 and 26: google.load("jquery", "1.4.2");
Page 27 and 28: Basic Selectors CHAPTER 1 ■ INTRO
Page 29 and 30: Only one paragraph in our document
Page 31 and 32: $(".foo+p"); CHAPTER 1 ■ INTRODUC
Page 33 and 34: $("p:odd"); [ p.foo, p#bar ] Select
Page 35 and 36: $("p:parent"); [ p, p.foo, p, p#bar
Page 37 and 38: which returns the following in the
Page 39: Selecting Only Enabled or Disabled
Page 42 and 43: 26 CHAPTER 2 ■ COMMON JQUERY ACTI
Page 103 and 104: C H A P T E R 3 ■ ■ ■ Object-
Page 105 and 106: $obj = new MyClass; var_dump($obj);
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CHAPTER 3 ■ OBJECT-ORIENTED PROGR
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$obj = new MyClass; // Get the valu
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} public function setProperty($newv
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} } return $this->getProperty(); pu
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Create a new object $newobj = new M
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} } // Create a new object $newobj
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Private Properties and Methods CHAP
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} public function __construct() { e
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*/ CHAPTER 3 ■ OBJECT-ORIENTED PR
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Ease of Implementation CHAPTER 3
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C H A P T E R 4 ■ ■ ■ Build a
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CHAPTER 4 ■ BUILD AN EVENTS CALEN
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# # DocumentRoot: The directory out
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CHAPTER 4 ■ BUILD AN EVENTS CALEN
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} ?> } } } CHAPTER 4 ■ BUILD AN E
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■ Note For the sake of brevity, D
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} ?> CHAPTER 4 ■ BUILD AN EVENTS
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} ?> } include_once $filename; CHAP
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private $_startDay; public function
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138 CHAPTER 4 ■ BUILD AN EVENTS C
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168 CHAPTER 5 ■ ADD CONTROLS TO C
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200 CHAPTER 6 ■ PASSWORD PROTECTI
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P A R T 3 ■ ■ ■ Combining jQu
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236 CHAPTER 7 ■ ENHANCING THE USE
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264 CHAPTER 8 ■ EDITING THE CALEN
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P A R T 4 ■ ■ ■ Advancing jQu
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312 CHAPTER 9 ■ PERFORMING FORM V
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C H A P T E R 10 ■ ■ ■ Extend
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$.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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