I assumed that Regular Expressions were the same throughout all languages? However I tried testing something in JavaScript in the same way that i have done in PHP with:

var regex = new RegExp ('[[:alpha:]]');
var string = 'asda sda a';

alert (regex.test (string));

This results in 'false', however

var regex = new RegExp ('[a-z]');
var string = 'asda sda a';

alert (regex.test (string));

results in true! Is is just that not all languages have names for character classes like PHP does?

Please don't tell me that Regex can be massively different across all languages!

Please don't tell me that Regex can be massively different across all languages!

Ok we won't tell you then
But these will -> http://www.regular-expressions.info/

well maybe not "massively different" but there are syntactic and implementational differences.


http://www.w3schools.com/js/js_obj_regexp.asp

Ahhh thanks, from what Ive looked at so far it just seems as though RegEx is just a standard that would apply to all languages? Or maybe I just haven't seen enough of the site yet!

That about sums it up.

How it is actually implemented is often "flexible"