<?php # this one worked fine for me, but it does not cover the full RFC like: "name" [EMAIL PROTECTED] OR name <[EMAIL PROTECTED]> $regex = "^[a-z0-9,!#\$%&'\*\+/=\?\^_`\{\|}~-]+(\.[a-z0-9,!#\$%&'\*\+/=\?\^_`\{\|}~-]+)[EMAIL PROTECTED](\.[a-z0-9-]+)*\.([a-z]{2,})$"; if (eregi($regex, $email)) { // do something } # Beware that the filter functions only work under PHP5+. If your PHP supports them they should be the preferred choice ?>
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