CODEWITHSUNDEEP
regex
Vladyslav Poltorak
Vladyslav Poltorak

Reputation: 31

RegEx: Not only digits in email

How can I improve my My RegEx in order to forbid input only digits in my email.

My RegEx: 

^([a-z0-9а-я_.-]{4,20})@([a-zа-я_]{2,5})\\.([a-zа-я]{2,5})(\\.[a-zа-я]{2,5})?$

Invalid:

[email protected]

Valid:

[email protected]

Upvotes: 2

Views: 787

Answers (1)

Wiktor Stribiżew
Wiktor Stribiżew

Reputation: 626950

You may add (?![0-9]+@) after ^ in your regex:

^(?![0-9]+@)([a-z0-9а-я_.-]{4,20})@([a-zа-я_]{2,5})\\.([a-zа-я]{2,5})(\\.[a-zа-я]{2,5})?$
 ^^^^^^^^^^^

The negative lookahead will fail all cases where you have 1 or more digits followed with @ at the start of the string.

See the regex demo.

Upvotes: 3

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