CategoryRegular Expressions

June 1, 2009 — Regular expressions are an essential part of any programmer’s toolkit. They can be very handy when you need to identify, replace or modify text, words, patterns or characters. In a nutshell: regular expressions (regex) are like a Swiss army knife for modifying strings of just about anything. Need to make your site URLs look pretty? Use regex. Need to remove all punctuation from a sentence? Definitely use regex. The uses for regular expressions are almost limitless. Regular expressions are something that you’ll come across at least once in your development cycle, whether you’re just trying to modify an .htaccess file to make clean URLs, or something much more advanced like filtering RSS feeds or other data. Here are some resources to get you well on your way to mastering regex. Read more…

May 6, 2009 — Regular expressions (or regex) are a powerful way to traverse large strings in order to find information. They rely on underlying patterns in a string’s structure to work their magic. Unfortunately, simple regular expressions are unable to cope with complex patterns and symbols. To deal with this dilemma, you can use advanced regular expressions. Below, we present an introduction to advanced regular expressions, with eight commonly used concepts and examples. Each example outlines a simple way to match patterns in complex strings. If you do not yet have experience with basic regular expressions, have a look at this article to get started. The syntax used here matches PHP regular expressions. Read more…