~ characters are legal in the local part of an e-mail address but in the above regular expression those characters are filtered out. It begins with at least one or more word characters including the underscore, equivalent to [A-Za-z0-9_].
Email addresses: easy to create, difficult to type. Note that FILTER_VALIDATE_EMAIL will validate email addresses that contain domains and top-level domains that do not exist.
Check out this list for tests (both failed and succeeded) of the regex used by PHP's is the best option.
If you want to know which regex pattern PHP (currently) uses to validate email addresses see the PHP source.
Hi All I am using a standard Rapidweaver Contact form.This extension is part of PHP Core version 5.20 and above, but you can always install it under Linux.You can use filters to validate following type of data:= The author is the creator of nix Craft and a seasoned sysadmin and a trainer for the Linux operating system/Unix shell scripting.As stated: "Feel free to use and redistribute this code.But please keep this copyright notice."This pattern is extremely complex in case you need to use it with function like "preg_match_all" over big text string with emails inside. I mean if you want to: preg_match_all($pattern, $text_string, $matches); then this complex pattern will overload the server if you need to parse really big [email protected] Haa: Postfix 3.0 supports it for almost two years now: postfix.org/SMTPUTF8_, and it is included in Ubuntu 16.04 and will be included in the next Debian release, for example. Webmail providers like Gmail have also added support for sending/receiving such emails, although you cannot yet create unicode accounts.He has worked with global clients and in various industries, including IT, education, defense and space research, and the nonprofit sector.