What potential pitfalls should be considered when linking data from a PHP form to a new page?

One potential pitfall when linking data from a PHP form to a new page is the risk of data manipulation or injection if the input is not properly sanitized. To mitigate this risk, it is important to validate and sanitize the input data before using it on the new page to prevent any malicious attacks. 

// Validate and sanitize input data from the form
$name = isset($_POST['name']) ? htmlspecialchars($_POST['name']) : '';
$email = isset($_POST['email']) ? filter_var($_POST['email'], FILTER_SANITIZE_EMAIL) : '';

// Redirect to a new page with the sanitized data
header("Location: new_page.php?name=$name&email=$email");
exit;

Keywords

PHP form data linking new page security vulnerabilities data validation

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