O'Reilly logo

PHP and MySQL for Dynamic Web Sites: Visual QuickPro Guide, Fifth Edition by Larry Ullman

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

14. Perl-Compatible Regular Expressions

Regular expressions are an amazingly powerful—but often taxing—tool available in most of today’s programming languages and even in many applications. Think of regular expressions as an elaborate system of matching patterns. You first write the pattern and then use one of PHP’s built-in functions to apply the pattern to a value (regular expressions are applied to strings, even if that means a string with a numeric value). Whereas a string function could see if the name John is in some text, a regular expression could ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required