PCAnalyzer wrote:

If i use the escape char "\", it automatically removes it when i save the field, why?

You're using regex as if it's "Forbidden words..". This is not how regex works, please review the information found here on regex usage.

Your email regex appears correct, but it's highly dependent on what content the user is providing. For example the following emails will validate, but is clearly not valid with the regex you've provided.

[code:1]
email@..............domain.com
email..............@domain.com
email@

---

domain.com
email______________@domain.com
[/code:1]

You could use the following for example to remove consecutive periods in the domain.

[code:1]
/^[a-zA-Z0-9._%+-]+@(?:[a-zA-Z0-9-]+\.)+[a-zA-Z]{2,6}$/
[/code:1]

However the following would still validate. It's simply a matter of trial and error until you've something satisfactory.

[code:1]
email..............@domain.com
email@

---

domain.com
email______________@domain.com
[/code:1]

You could then add more checks to prevent consecutive periods AND dashes (dashes optional) using the following.

[code:1]
/^(?:[a-zA-Z0-9]+-?\.?_?\+?%?)+@(?:«»(?:[a-zA-Z0-9]+-?)+\.)+[a-zA-Z]{2,6}$/
[/code:1]

Post edited by: krileon, at: 2010/06/10 23:27

PCAnalyzer wrote:

Thank you, anyway the problem is the same: the escape char "backslash" is removed when you save the field, why?

I don't know, if that's the case then simply encase in brackets as follows.

[code:1]
/^(?:[a-zA-Z0-9]+[-]?[.]?[_]?[+]?[%]?)+@(?:«»(?:[a-zA-Z0-9]+[-]?)+[.])+[a-zA-Z]{2,6}$/
[/code:1]