Filters whether an email address is valid.

This filter is evaluated under several different contexts, such as ’email_too_short’, ’email_no_at’, ‘local_invalid_chars’, ‘domain_period_sequence’, ‘domain_period_limits’, ‘domain_no_periods’, ‘sub_hyphen_limits’, ‘sub_invalid_chars’, or no specific context.

$is_email string|false

The email address if successfully passed the is_email() checks, false otherwise.

$email string

The email address being checked.

$context string

Context under which the email was tested.

File: wp-includes/formatting.php. View all references

return apply_filters( 'is_email', false, $email, 'email_too_short' );