class Controller { public $password; public $number; public function __consruct() { } public function encrypt_data($sNumber, $sPassword) { // noch entschluesselung einbauen $this->number = $sNumber; $this->password = $sPassword; } } $controller = new Controller(); $controller->encrypt_data($postNumber, $postPassword); echo "Number: " . $controller->number . "<br>"; echo "Password: "******"<br>"; // Connecting, selecting database $mysqli = new mysqli("127.0.0.1", "user00", "password", "messenger"); /* check connection */ if (mysqli_connect_errno()) { printf("Connect failed: %s\n", mysqli_connect_error()); exit; } // Performing SQL query $query = 'SELECT * FROM user WHERE ' . 'number=\'' . $controller->number . '\' AND password=\'' . $controller->password . '\''; echo $query . " <br> <br> "; if ($result = $mysqli->query($query)) { echo "Number of found entires " . $result->num_rows . "<br> <br>"; /* fetch object array */