How can PHP developers ensure that email addresses begin and end with an alphanumeric character?

To ensure that email addresses begin and end with an alphanumeric character, PHP developers can use regular expressions to validate the format of the email address. By checking if the first and last characters of the email address are alphanumeric, developers can ensure that the address meets the required criteria. 

$email = "test@example.com";

if (preg_match('/^[a-zA-Z0-9].*[a-zA-Z0-9]@[a-zA-Z0-9]+\.[a-zA-Z]{2,}$/', $email)) {
    echo "Email address is valid";
} else {
    echo "Email address is not valid";
}

Keywords

PHP regular expressions preg_match email validation alphanumeric character

Related Questions