Email allowed chars regex?

[Mittineague]

@SamA74

error prone regex.

Reminds me of this post

Regex or filter_var

Always use a built in function for validation where one is available and only use a regex when it isn’t. Anyway: filter_var($email, FILTER_VALIDATE_EMAIL) is a lot shorter than: preg_match('/^[\\040\ ]*(?:\\([^\\\\\\x80-\\xff\ \\015()]*(?:(?:\\\\[^\\x80-\\xff]|\\([^\\\\\\x80-\\xff\ \\015()]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\ \\015()]*)*\\))[^\\\\\\x80-\\xff\ \\015()]*)*\\)[\\040\ ]*)*(?:(?:[^(\\040)<>@,;:".\\\\\\[\\]\\000-\\037\\x80-\\xff]+(?![^(\\040)<>@,;:".\\\\\\[\\]\\000-\\037\\x80-…