How can PHP code be securely validated before sending an email?

To securely validate PHP code before sending an email, you can use PHP's filter_var() function with the FILTER_VALIDATE_EMAIL filter to check if the email address is valid. This helps prevent sending emails to invalid or malicious addresses. 

$email = "example@example.com";

if (filter_var($email, FILTER_VALIDATE_EMAIL)) {
    // Code to send email
    echo "Email sent successfully.";
} else {
    echo "Invalid email address.";
}

Keywords

PHP validation email security filtering

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