2 replies to this topic

[Gustavo el Geranie]

Hi,

regular expressions are a very useful thing for pattern matching, but if you don't know them well, they are at least cryptic. How to make the first step?

This is a list of links to sites that are related to regular expressions, if you know better sites, please post a reply.

Tutorials:

• regular-expressions.info tutorial
• Regular Expressions PHP Tutorial: This has limited regular expressions explications, but a nice PHP regular expressions functions part
• tutorial at freelance volunteer
• How To Use Regular Expressions In Perl And PHP

For the experienced:

• Pattern modifiers
• Pattern syntax
• Perl Regular Expressions Mastery

This is a program where you can evaluate regexps in realtime, very useful for testing new ideas
RegExpEditor

And one more thing, in PHP use the preg_* functions (PCRE functions) rather than the ereg_* functions (POSIX functions). They are faster and more complete.

[php3ch0]

Just to add

Regex for email: /w+([-+.]w+)*@w+([-.]w+)*.w+([-.]w+)*

[Kuulest]

If you use regular expressions extensively some regex editor is indeed a must-have. I use regexcoach for that purpose as it's supported by both Linux and Wins.
Check out http://www.weitz.de/regex-coach/ for more info.