What are some recommended methods for securely passing sensitive information through PHP links on a website?

When passing sensitive information through PHP links on a website, it is important to ensure that the data is encrypted to prevent unauthorized access. One recommended method is to use PHP's built-in encryption functions, such as mcrypt_encrypt and mcrypt_decrypt, to encrypt the sensitive data before passing it in the link. Additionally, using HTTPS to secure the communication between the client and server is crucial to protect the data in transit.

// Encrypt sensitive data before passing it through a link
$sensitiveData = "mySensitiveData";
$encryptionKey = "myEncryptionKey";

$encryptedData = base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, md5($encryptionKey), $sensitiveData, MCRYPT_MODE_CBC));

// Pass the encrypted data in the link
echo "<a href='http://example.com/page.php?data=$encryptedData'>Link</a>";