Posted by Jeff on 03/22/07 16:24

What your original regular expression is saying is that the last
character in the string is a + or a number 0 thru 9.

/^\+?[0-9 ]+$/

What Toby's expression is saying is that it starts with an optional +
(? means 0 or 1) and then has 1 or more #'s or spaces in a row until
the end of the string.

The ^ means starting at the beginning of the string and the $ means
the end.

Hope that helps explain it somewhat.

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