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

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C H A P T E R 1 ■ ■ ■ Introducing jQuery To fully understand jQuery and its applications in modern web programming, it's important to take a moment and look back at where jQuery came from, what needs it was built to fill, and what programming in JavaScript was like before jQuery came around. In this chapter you'll learn about JavaScript libraries and the needs they seek to fulfill, as well as why jQuery is the library of choice for the majority of web developers. You'll also learn the basics of jQuery, including how to make the library available for use in your applications and how the core of jQuery—its powerful selector engine—works. Choosing jQuery over JavaScript JavaScript has a reputation for being rather unwieldy in web applications. A lack of consistent browser support, difficult debugging, and an intimidating syntax can make learning JavaScript feel impossible. To be fair, all the things that make JavaScript seem difficult are part of what make it so powerful, but that doesn't make it any more inviting to a novice web developer looking to add JavaScript to his arsenal. Understanding JavaScript Libraries The steep learning curve associated with JavaScript has been a sore spot for developers for years, and as frustrations grew, several ambitious developers started building JavaScript libraries, also referred to as JavaScript frameworks. These libraries aimed to simplify the use of JavaScript to make it more accessible to both new and existing developers by creating easy-to-use control functions that remove some of the heavy lifting from everyday JavaScript tasks. Libraries are especially useful in the realm of Asynchronous JavaScript and XML (AJAX) due to the complexity of performing the same tasks using straight JavaScript. JavaScript libraries aim to provide a simpler syntax for common tasks, which translates to a faster workflow for developers and a less intimidating learning curve for beginners. They also eliminate some of the headache involved in coding cross-browser JavaScript by doing all the compatibility checks for you within their built-in methods, which is a huge time-saver when coding. 3
Page 1: THE EXPERT’S VOICE ® IN OPEN SOU
Page 4 and 5: 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 20 and 21: 4 CHAPTER 1 ■ INTRODUCING JQUERY
Page 41 and 42: C H A P T E R 2 ■ ■ ■ Common
Page 43 and 44: CHAPTER 2 ■ COMMON JQUERY ACTIONS
Page 47 and 48: $("p.foo").next(); This generates t
Page 49 and 50: [ p, p.foo, p ] .parent() CHAPTER 2
Page 51 and 52: .andSelf() CHAPTER 2 ■ COMMON JQU
Page 53 and 54: Figure 2-1. The button to activate
Page 59 and 60: Figure 2-5. The expanded element, i
Page 61 and 62: This produces an identical result w
Page 65 and 66: Figure 2-11. After unwrapping the s
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CHAPTER 2 ■ COMMON JQUERY ACTIONS
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.css() CHAPTER 2 ■ COMMON JQUERY
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$("#bar").text("This is new text.")
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$("p.foo").data({ "nickname":"Wubby
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.height() and .width() CHAPTER 2
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.map() and .each() CHAPTER 2 ■ CO
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Figure 2-20. Using .each(), the exp
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Using the second format, the code w
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{ }, "duration":6000, "step":functi
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}); "mouseover":function(){ console
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To send a request with data using P
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P A R T 2 ■ ■ ■ Getting Into
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88 CHAPTER 3 ■ OBJECT-ORIENTED PR
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100 CHAPTER 3 ■ OBJECT-ORIENTED P
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120 CHAPTER 4 ■ BUILD AN EVENTS C
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} ?> ■ Note For the sake of brevi
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* The event ID * * @var int */ publ
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} * Create a new array, then organi
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} ?> } /* * Return the markup for o
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9. After the loop, run another loop
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CHAPTER 4 ■ BUILD AN EVENTS CALEN
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Figure 4-5. The markup as generated
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} } if ( isset($events[$c]) ) { for
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} background-color: #BCD; .weekdays
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private $_daysInMonth; private $_st
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* * Include necessary files */ incl
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C H A P T E R 5 ■ ■ ■ Add Con
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} /* * Build the markup */ return
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} ?> CHAPTER 5 ■ ADD CONTROLS TO
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} legend { font-size: 24px; font-we
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CHAPTER 5 ■ ADD CONTROLS TO CREAT
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private $_m; private $_y; private $
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Figure 5-4. The Admin button appear
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} ?> CHAPTER 5 ■ ADD CONTROLS TO
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$css_files = array("style.css", "ad
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Generating a Delete Button CHAPTER
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public function __construct($dbo=NU
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value="Nope! Just Kidding!" />
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include_once 'assets/common/header.
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C H A P T E R 6 ■ ■ ■ Passwor
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Please Log In Username Password
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} ?> } /* * If an int was passed, s
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} try { WHERE `user_name` = :uname
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} else { return "Your username or p
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Creating this function is relativel
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$obj = new Admin($dbo); // Load a h
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( 'testuser', 'a1645e41f29c45c46539
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} } else { // Redirect to the main
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CHAPTER 6 ■ PASSWORD PROTECTION S
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*/ return
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Modifying the App to Handle the Use
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Figure 6-8. Clicking the Log Out bu
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ADMIN_OPTIONS; } else { return
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private $_daysInMonth; private $_st
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if ( !isset($_SESSION['user']) ) {
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include_once 'assets/common/footer.
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C H A P T E R 7 ■ ■ ■ Enhanci
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Create a JavaScript Initialization
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Including the Stylesheet in the Ind
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}); }); event.preventDefault(); //
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}); }); CHAPTER 7 ■ ENHANCING THE
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Calling the Utility Function from t
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var obj = { "name" : "Jason Lengsto
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* * Enable sessions */ session_star
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Pulls up events in a modal window $
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Add a Close Button CHAPTER 7 ■ EN
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Fade Out the Modal Window CHAPTER 7
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Figure 7-4. The modal window mid-fa
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}; } { } event.preventDefault(); //
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CHAPTER 7 ■ ENHANCING THE USER IN
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C H A P T E R 8 ■ ■ ■ Editing
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$("li>a").live("click", function(ev
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} else { $id = NULL; } echo $obj->$
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} "boxin" : function(data, modal) {
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CHAPTER 8 ■ EDITING THE CALENDAR
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} { $id = (int) $_POST['event_id'];
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}; }, // Deserializes the query str
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}; }, // Code to add the event goes
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}; "deserialize" : function(str){..
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}; "deserialize" : function(str){..
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}; }, // Since the date object is c
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Edits events without reloading $(".
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Figure 8-3. Here the event cannot b
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} * Returns the ID of the event */
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}); var action = "edit_event"; // L
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}); id = $(event.target) .siblings(
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}); // Prevents the form from submi
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Figure 8-6. After you edit an event
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foreach ( $C as $name => $val ) { d
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CHAPTER 8 ■ EDITING THE CALENDAR
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); ) 'object' => 'Calendar', 'metho
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}; "removeevent" : function() { //
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Figure 8-9. After deleting "Test Ev
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C H A P T E R 9 ■ ■ ■ Perform
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* * Start by simply outputting the
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egexes, they will become a powerful
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TEST_DATA; /* * Use str_ireplace()
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After you get the hang of regular e
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em { background-color: #FF0; border
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Using Character Class Shorthand CHA
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CHAPTER 9 ■ PERFORMING FORM VALID
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Figure 9-12. Adding an optional che
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Regular Expression Demo em { ba
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Figure 9-17. Expanding the validate
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CHAPTER 9 ■ PERFORMING FORM VALID
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public function displayForm() {...}
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} ?> CHAPTER 9 ■ PERFORMING FORM
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Including the New File in the Foote
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}); // Fades out the modal window f
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Figure 9-25. The error message in a
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346 CHAPTER 10 ■ EXTENDING JQUERY
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362 ■ INDEX ■ A active class, 2
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364 ■ INDEX class.calendar.inc.ph
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366 ■ INDEX .not( ) method, 27 .p
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368 ■ INDEX array of event object
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370 ■ INDEX .hide( ) method, 65-6
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372 ■ INDEX login credentials cla
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374 ■ INDEX adding effects to, 25
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376 ■ INDEX setting in events cal
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378 ■ INDEX extracting query stri
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