Trying to access array offset on value of type bool in C:\xampp\htdocs\read tag user data.php on line 17 there is problem in null==$data['name']

Question

$msg = null; if (null==$data[\'name\']) { $msg = "The ID of your Card / KeyChain is not registered !!!";$data[\'id\']=$id;$data[\'name\']="--------";$dat