What are the potential pitfalls of using regular expressions for email validation in PHP?

Using regular expressions for email validation in PHP can be error-prone and may not cover all possible valid email formats. It is better to use PHP's built-in filter_var function with the FILTER_VALIDATE_EMAIL flag for more accurate validation. 

$email = "example@example.com";

if (filter_var($email, FILTER_VALIDATE_EMAIL)) {
    echo "Valid email address";
} else {
    echo "Invalid email address";
}

Keywords

regular expressions email validation PHP pitfalls error types

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