Are there any security considerations to keep in mind when implementing a PHP contact form?

One security consideration to keep in mind when implementing a PHP contact form is to prevent email injection attacks by sanitizing user input before sending the email. This can be done by using the `filter_var()` function with the `FILTER_SANITIZE_EMAIL` filter to validate the email address input. 

$email = filter_var($_POST['email'], FILTER_SANITIZE_EMAIL);
$name = filter_var($_POST['name'], FILTER_SANITIZE_STRING);
$message = filter_var($_POST['message'], FILTER_SANITIZE_STRING);

// Rest of the code to send the email using the sanitized input

Keywords

SQL injection cross-site scripting form validation CSRF protection input sanitization

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