Obtaining Response from PHP File Using AJAX

In this scenario, you wish to acquire a response from process.php via AJAX. The objective is to capture this response and store it as a variable.

To initiate the process, the back-end PHP file (process.php) needs to echo the intended response, such as "apple" or "plum." Plain text suffices; encoding in JSON is not necessary.

The JavaScript code posted initially lacks a parameter in the success function of the AJAX call. To retrieve the server response effectively, add the following line:

success: function(data) {
   alert(data); // displays "apple" in the alert
}

The alert serves as an example; you can store the response in a variable by replacing this line with var response = data;.

As for naming the POST request, you can provide two arguments in the data parameter of the AJAX call:

$.ajax({
  ...
  data: {name: "someName", value: "someValue"},
  ...
});

This allows you to retrieve the named value from process.php using PHP's HTTP request accessors ($_POST['name'], $_POST['value']).