Regex Question (detecting spam)

Question

Hi all,

I'm getting strange kind of spam, where the email body only contains this:

4606142 5801100 2704743

How can I grep this with regex?

It's 3x7 numbers, separated with space.

thx

Answer 1

Try this

(\d{7} ?){3}

or, if that whitespace makes a difference (just like Al said in comments)

(\d{7} ){2}\d{7}

Answer 2

Try this

[0-9]{7}\s[0-9]{7}\s[0-9]{7}

[0-9]{7}: 7 occurences of the characters '0' to '9'

\s: whitespace character

Answer 3

You might want to capture arbitrary combinations of digits and whitespace:

^[\d\s]*$

Answer 4

Would this do? (\d{1,7}\s{0,})+

The reason I conclude the \s with a quantifier is it will fail when it reaches the end of the line where the last character after that may not be a space but a carriage return.

Hope this helps, Best regards, Tom.