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Jimbo · Jun 29th, 2006, 12:18 PM

I looked things over yet again, and here's what I came up with, broken down:

<letter> = '[A-Za-z]';
<letdig> = '[A-Za-z0-9]'
<locChar> = '[!#$%&\'*+/=?^_`{|}~A-Za-z0-9-]'   # valid chars for the local part, minus the dot
<domChar> = '[A-Za-z0-9-]'  # adds the hyphen to letdig
<local> = '(<locChar>+\.)*<locChar>+'
<domain> = '(<letter>(<domChar>*<letdig>)*\.)*<letter>(<domChar>*<letdig>)*'
<email> = '^<local>@<domain>$'

which brings the regex to:

(Toggle Plain Text)

'^([!#$%&\'*+/=?^_`{|}~A-Za-z0-9-]+\.)*[!#$%&\'*+/=?^_`{|}~A-Za-z0-9-]+@([A-Za-z]([A-Za-z0-9-]*[A-Za-z0-9])\.)*[A-Za-z]([A-Za-z0-9-]*[A-Za-z0-9])$'

Jun 29th, 2006, 12:18 PM	#5
Jimbo Battle Programmer Join Date: Feb 2006 Location: Bellevue, WA, USA Posts: 763 Rep Power: 3	I looked things over yet again, and here's what I came up with, broken down: (Toggle Plain Text) <letter> = '[A-Za-z]'; <letdig> = '[A-Za-z0-9]' <locChar> = '[!#$%&\'+/=?^_`{\|}~A-Za-z0-9-]' # valid chars for the local part, minus the dot <domChar> = '[A-Za-z0-9-]' # adds the hyphen to letdig <local> = '(<locChar>+\.)<locChar>+' <domain> = '(<letter>(<domChar><letdig>)\.)<letter>(<domChar><letdig>)' <email> = '^<local>@<domain>$' <letter> = '[A-Za-z]'; <letdig> = '[A-Za-z0-9]' <locChar> = '[!#$%&\'+/=?^_`{\|}~A-Za-z0-9-]' # valid chars for the local part, minus the dot <domChar> = '[A-Za-z0-9-]' # adds the hyphen to letdig <local> = '(<locChar>+\.)<locChar>+' <domain> = '(<letter>(<domChar><letdig>)\.)<letter>(<domChar><letdig>)' <email> = '^<local>@<domain>$' which brings the regex to: (Toggle Plain Text) '^([!#$%&\'+/=?^_`{\|}~A-Za-z0-9-]+\.)[!#$%&\'+/=?^_`{\|}~A-Za-z0-9-]+@([A-Za-z]([A-Za-z0-9-][A-Za-z0-9])\.)[A-Za-z]([A-Za-z0-9-][A-Za-z0-9])$' '^([!#$%&\'+/=?^_`{\|}~A-Za-z0-9-]+\.)[!#$%&\'+/=?^_`{\|}~A-Za-z0-9-]+@([A-Za-z]([A-Za-z0-9-][A-Za-z0-9])\.)[A-Za-z]([A-Za-z0-9-][A-Za-z0-9])$'