How can PHP beginners ensure the security and integrity of their code when implementing email functionality in their projects?

To ensure the security and integrity of their code when implementing email functionality in PHP projects, beginners should sanitize user input to prevent SQL injection and cross-site scripting attacks, validate email addresses to prevent email header injections, and use secure email libraries or functions to send emails securely. 

// Sanitize user input
$email = filter_var($_POST['email'], FILTER_SANITIZE_EMAIL);

// Validate email address
if(filter_var($email, FILTER_VALIDATE_EMAIL)) {
    // Send email using a secure email library or function
    mail($email, "Subject", "Message");
} else {
    echo "Invalid email address";
}

Keywords

PHP email functionality security integrity beginners

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