Regex for multiline email addresses?

Question

I am looking for RegEx for several email addresses. For instance:

1) Single email address:

 [e-mail] - ok 

2) Two line email address:

 [e-mail] karensmith@emailcom - ok 

3) Two line email address:

 john [e-mail] - not ok karensmith@emailcom 

I tried the following:

 ((\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*(\r\n)?)+)\r* 

But when I test it, it still matches the window if there is 1 valid email address, as in example 3.

I need a rule that lists all email addresses.

Answer 1

What about:

 ^(((\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*(\r\n)?\s?)+)*)$ 

Check the beginning of the line using "^" and the end - "$". Allow the optional space character with "\ s?".

Try http://myregexp.com/signedJar.html to test regex expressions.

Answer 2

I would split the string into [\r\n]+ , and then check each address individually.

Answer 3

I assume that you will probably need a multi-line parameter at the end of your regex (in most cases /m after regexp).

Change You can also add \A and \z anchors to mark the beginning and end of the input. Here is a good article on anchors.

Edit Quick and dirty Ruby example:

 /\A\ w+@ \w+\.\w+(\n\ w+@ \w+.\.\w+)*\z/ 

Will produce:

 " [e-mail] \ [e-mail] ".match(/\A\ w+@ \w+\.\w+(\n\ w+@ \w+\.\w+)*\z/) => #<MatchData " [e-mail] \ [e-mail] " 1:"\ [e-mail] "> " [e-mail] \nthebar.pl".match(/\A\ w+@ \w+\.\w+(\n\ w+@ \w+\.\w+)*\z/) => nil " [e-mail] ".match(/\A\ w+@ \w+\.\w+(\n\ w+@ \w+\.\w+)*\z/) => #<MatchData " [e-mail] " 1:nil> " test@here ".match(/\A\ w+@ \w+\.\w+(\n\ w+@ \w+\.\w+)*\z/) => nil 

You can improve the regex and it should work. The key was to use the \A and \z bindings. The /m modifier is not required.