What are some common pitfalls when filtering email inputs in PHP registration scripts?

One common pitfall when filtering email inputs in PHP registration scripts is not properly sanitizing the input data, which can lead to security vulnerabilities such as SQL injection or cross-site scripting attacks. To solve this issue, always use PHP's filter_var function with the FILTER_SANITIZE_EMAIL flag to validate and sanitize email inputs. 

$email = filter_var($_POST['email'], FILTER_SANITIZE_EMAIL);
if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
    // Invalid email format
    // Handle error or display message to user
} else {
    // Proceed with registration process
}

Keywords

email inputs filtering PHP registration scripts validation security

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