How does PHP handle Unicode characters in email validation using filter functions?

PHP handles Unicode characters in email validation using filter functions by specifying the FILTER_VALIDATE_EMAIL flag which allows Unicode characters in the local part of the email address. This ensures that email addresses with Unicode characters are considered valid during validation. 

$email = "example@exámple.com";
if (filter_var($email, FILTER_VALIDATE_EMAIL)) {
    echo "Valid email address";
} else {
    echo "Invalid email address";
}

Keywords

PHP Unicode characters email validation filter functions encoding.

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