Storing $_POST values in an array to save them to text file

Question

I have multiple $_POST values which I want to store in an array to save to a text file. How would I go about doing this?

PHP code:

Answer 1

$data["name"]=$_POST["name"] 
$data["email"]=$_POST["email"] 
$data["msg"]=$_POST["msg"] 
$data["origin"]=$_POST["origin"] 

file_put_contents("filename.txt", serialize($data));

and to bring those values back from a file:

$data = unserialize(file_get_contents("filename.txt"));