Testing jQuery

PART 4: Advancing jQuery and PHP.....................................................................309 
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CONTENTS 
 
 
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Chapter 9: Performing Form Validation with Regular Expressions .....................311 
Getting Comfortable with Regular Expressions .............................................................311 
Understanding Basic Regular Expression Syntax................................................................................. 311 
Drilling Down on the Basics of Pattern Modifiers................................................................................. 316 
Getting Fancy with Backreferences...................................................................................................... 318 
Matching Character Classes................................................................................................................. 320 
Finding Word Boundaries ..................................................................................................................... 323 
Using Repetition Operators................................................................................................................... 323 
Detecting the Beginning or End of a String .......................................................................................... 324 
Using Alternation .................................................................................................................................. 324 
Using Optional Items............................................................................................................................. 325 
Putting It All Together........................................................................................................................... 326 
Adding Server-Side Date Validation...............................................................................328 
Defining the Regex Pattern to Validate Dates....................................................................................... 328 
Adding a Validation Method to the Calendar Class............................................................................... 333 
Returning an Error if the Dates Don’t Validate...................................................................................... 334 
Adding Client-Side Date Validation................................................................................338 
Creating a New JavaScript File to Validate the Date String.................................................................. 338 
Including the New File in the Footer..................................................................................................... 339 
Preventing the Form Submission if Validation Fails ............................................................................. 339 
Summary .......................................................................................................................343 
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