How to call class method from one php file in another using javascript? [duplicate]

Question

i have a class like so

class TestClass() {
   public function TestFunction() {
        return "TESTING"
    }
}

I am importing the class in another php file like so

use \Path\To\TestClass


<script>
how to call it here ?
</script>

and here using js i want to call the method that exists in that class how can i do it ? Thanks in advance

Your JavaScript code runs in the browser (the client), while your php code runs on the server. Thus, you'll have to arrange to make an HTTP request on the client to do anything back on the server. — Pointy
– Pointy, Commented Nov 4, 2023 at 14:09
Make a HTTP request from JS to a PHP script which then calls the relevant function. You can't call PHP functions direct from JS - they are two different languages which run in two entirely different environments - and usually at different points in time on different physical machines. Hence why they communicate using a protocol such as HTTP. — ADyson
– ADyson, Commented Nov 4, 2023 at 14:18

Mahammed Sarfaraz Nawaz Pagala · Accepted Answer · 2023-11-04 14:19:38Z

You can send http requst because PHP is a server side language, and JavaScript is a client-side language. JavaScript runs in the browser, while PHP runs on the server.

Create a script like this to send response in json

class TestClass {
    public function TestFunction() {
        return "TESTING";
    }
}

$testClass = new TestClass();

if (isset($_GET['action']) && $_GET['action'] === 'callTestFunction') {
    $result = $testClass->TestFunction();
    echo json_encode(["result" => $result]);
}

In html file,

<script>
    $(document).ready(function() {
        $.ajax({
            url: 'TestClass.php?action=callTestFunction',
            method: 'GET',
            dataType: 'json',
            success: function(data) {
                console.log(data.result); // Output--"TESTING"
            },
            error: function(xhr, status, error) {
                console.error("Error:", error);
            }
        });
    });
</script>

and Ok make sure to add this above the script in html

<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>

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