email-validation_email_dogrulama
^ - This indicates the beginning of the expression.
- This part specifies that the first character cannot be a digit, hyphen, or underscore. So the first character must be a letter, period, or other special character.
[A-z0-9.-]+ - This part requires the username to contain at least one character...
Submitted by Emre Yıldırım - 3 months ago