[SOLVED] preg_match('/^\w+$/',$string);

[jonniejoejonson]

I know what

preg_match('/^\w+$/',$string);

does.. however it is the

'/^\w+$/'

part what chars does it actually lok for.. and does anyone know of a site that lists the different ways to write these expressions.. eg:

"[^A-Za-z0-9]"

regards J

[Zane]

There's a good tutorial on Regex Basics on the main site

[Garethp]

It searchs [A-Za-z] \w is word characters. \d is digits. \s is whitespace

[Adam]

It searchs [A-Za-z] \w is word characters. \d is digits. \s is whitespace

 

\w matches: a-z A-Z 0-9 _

 

Basically all it does is match a string that consists of *only* those characters I just listed above, and is 1 or more character in length.

[.josh]

it also may match additional characters based on locale settings.  For portability, safest bet is to not use shortcut classes.

[jonniejoejonson]

Thanks for your responses.