note 80459 deleted from function.preg-match by felipe

Note Submitter: ghoti ---- Another pointer regarding the example from BK below.... Email addresses can actually contain a great deal more non-alphanumeric characters than this regexp implies. The characters are listed here in http://www.faqs.org/rfcs/rfc2822.html section 3.2.4. For validating email addresses prior to an actual emailed challenge, I have been using the following regexp with eregi for years to match the left-hand side of an email address: ^[a-z0-9][a-z0-9!#$%&'*+/=?^_`{|}-]+$ Of course, the right-hand side is this: ^([a-z0-9][a-z0-9-]+\.)+[a-z][a-z]+$ Anything more restrictive violates standards. Watch your quotes.