8  * Stateless email-address utilities: obfuscation, validation, and quoted-printable body encoding.
21      * Pattern for use in email detection and validation.
36     // region email-address obfuscation
39      * Return an obfuscated email address suitable for HTML text content
47      * @param string $email raw email address, optionally followed by ?query
50     public static function obfuscate(string $email): string  argument
54         [$addr, $query] = sexplode('?', $email, 2);
68      * Return an obfuscated email address suitable for use as a mailto: href
78      * @param string $email raw email address, optionally followed by ?query
81     public static function obfuscateUrl(string $email): string  argument
85         [$addr, $query] = sexplode('?', $email, 2);
124      * @param string $email the address to check
127     public static function isValid(string $email): bool  argument
129         return \EmailAddressValidator::checkEmailAddress($email, true);