What are some common pitfalls when adding spam protection to a PHP contact form, such as using the !empty function?

One common pitfall when adding spam protection to a PHP contact form using the !empty function is that it only checks if a field is not empty, but it does not verify the content entered. To solve this, you can add additional checks such as verifying the format of an email address or using a CAPTCHA. 

// Example of adding spam protection to a PHP contact form
if (!empty($_POST['name']) && !empty($_POST['email']) && filter_var($_POST['email'], FILTER_VALIDATE_EMAIL)) {
    // Process the form submission
    // Additional spam protection code can be added here
} else {
    // Handle error if fields are empty or email is invalid
}

Keywords

spam protection PHP contact form !empty function validation security

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