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320 CHAPTER 9 ■ PERFORMING FORM VALIDATION WITH REGULAR EXPRESSIONS Figure 9-4. A more complex replacement ■ Note The remaining examples in this section will use only regexes. Matching Character Classes In some cases, it’s desirable to match more than just a word. For instance, sometimes you want to verify that only a certain range of characters was used (i.e., to make sure only numbers were supplied for a phone number or that no special characters were used in a username field). Regexes allow you to specify a character class, which is a set of characters enclosed in square brackets. For instance, to match any character between the letter a <strong>and</strong> the letter c, you would use [a-c] in your pattern. You can modify regex.php to highlight any character from A-C. Additionally, you can move the pattern into a variable <strong>and</strong> output it at the bottom of the sample data; this helps you see what pattern is being used when the script is loaded. Add the code shown in bold to accomplish this: Regular Expression Demo
em { background-color: #FF0; border-top: 1px solid #000; border-bottom: 1px solid #000; } CHAPTER 9 ■ PERFORMING FORM VALIDATION WITH REGULAR EXPRESSIONS After reloading the page, you’ll see the characters highlighted (see Figure 9-5). You can achieve identical results using [abc], [bac], or any other combination of the characters because the class will match any one character from the class. Also, because you’re using the case-insensitive modifier (i), you 321
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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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$("p:parent"); [ p, p.foo, p, p#bar
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which returns the following in the
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Selecting Only Enabled or Disabled
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26 CHAPTER 2 ■ COMMON JQUERY ACTI
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C H A P T E R 3 ■ ■ ■ Object-
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$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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Page 325: P A R T 4 ■ ■ ■ Advancing jQu
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Page 365 and 366: Modifying the Initialization Script
Page 367 and 368: Adding Methods to jQuery CHAPTER 10
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Page 371 and 372: CHAPTER 10■ EXTENDING JQUERY ■
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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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