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

312
CHAPTER 9 ■ PERFORMING FORM VALIDATION WITH REGULAR EXPRESSIONS
■ Note You can read more about PCRE at
http://en.wikipedia.org/wiki/Perl_Compatible_Regular_Expressions.
Setting up a Test File
To learn how to use regexes, you’ll need a file to use for testing. In the public folder, create a new file
called regex.php and place the following code inside it:
Regular Expression Demo
em {
background-color: #FF0;
border-top: 1px solid #000;
border-bottom: 1px solid #000;
}