Regular Expression of patterns.EMAIL_ADDRESS

Question

Does anyone know what the exact regular expression of androids patterns.EMAIL_ADDRESS uses?

I need to use the same pattern for PHP. Thank you.

If you need to validate emails in general and you're just looking for a regular expression and not that specific one for a particular reason, you may want to look at this: http://stackoverflow.com/questions/201323/using-a-regular-expression-to-validate-an-email-address — nonzaprej, May 18 '17 at 07:40
Possible duplicate of [Using a regular expression to validate an email address](http://stackoverflow.com/questions/201323/using-a-regular-expression-to-validate-an-email-address) — Dymen1, May 18 '17 at 07:43
I have not yet found a good regex that let's all real emails through. Because of that. Let the user type it twice and if he/she fails twice, it's not meant to be... — Andreas, May 18 '17 at 07:55

score 2 · Accepted Answer · answered May 18 '17 at 07:38

2

this is how PHP filter email

$Email = "dev@gmail.com";

if (filter_var($Email, FILTER_VALIDATE_EMAIL))
    echo "Email Is Valid";
else
    echo "Email Isn't Valid";

answered May 18 '17 at 07:38

A Dev

82
1
10

Does FILTER_VALID_EMAIL have the same regular expression as EMAIL_ADDRESS? I would like to know EMAIL_ADDRESS regex definition. Thanks – nerotech May 18 '17 at 07:49
@nerotech: RegEx don't differ that much from one environment to another, so use what you've got. Or follow the advice of **A Dev** and use `filter_var()`, it is a correct answer to your question. – KIKO Software May 18 '17 at 08:11
@nerotech, they both use same standard so, don't worry about result – A Dev May 18 '17 at 10:55

score 0 · Answer 2 · answered May 18 '17 at 07:42

 public boolean checkEmail(EditText editText) {
    boolean emailIsValid = editText.getText().toString().matches("[^.]?([a-zA-Z0-9]+[._]?)*[-]?([a-zA-Z0-9]+[._]?)*[a-zA-Z0-9][@][a-z0-9]*[-]?[a-z0-9]*[.][a-z0-9]*[.]?[a-z0-9]*");
    return !(android.util.Patterns.EMAIL_ADDRESS.matcher(editText.getText().toString()).matches()) || !emailIsValid;
}

if it returns true then it is not a valid email.

score 0 · Answer 3 · answered May 19 '17 at 12:07

checkEmail method will return true, if email text is valid.

public final static Pattern EMAIL_ADDRESS_PATTERN = Pattern.compile(

            "^(([\\w-]+\\.)+[\\w-]+|([a-zA-Z]{1}|[\\w-]{2,}))@"
                    + "((([0-1]?[0-9]{1,2}|25[0-5]|2[0-4][0-9])\\.([0-1]?"
                    + "[0-9]{1,2}|25[0-5]|2[0-4][0-9])\\."
                    + "([0-1]?[0-9]{1,2}|25[0-5]|2[0-4][0-9])\\.([0-1]?"
                    + "[0-9]{1,2}|25[0-5]|2[0-4][0-9])){1}|"
                    + "([a-zA-Z]+[\\w-]+\\.)+[a-zA-Z]{2,4})$");


    public static boolean checkEmail(String email) {
        return EMAIL_ADDRESS_PATTERN.matcher(email).matches();
    }

Please, have a look at these sites: TLD list https://www.iana.org/domains/root/db valid/invalid addresses https://en.wikipedia.org/wiki/Email_address#Examples regex for RFC822 email address http://www.ex-parrot.com/~pdw/Mail-RFC822-Address.html — Toto, May 19 '17 at 12:19

Regular Expression of patterns.EMAIL_ADDRESS

3 Answers3