Plivo app to receive a message on Slim Framework

receive_message.php

<?php
$app = new \Slim\Slim();
$app->post('/message_receive', function () {
    $req = $app->request();

    //The source number of the message. For eg.15671821841
    $from = $req->post('From');

    // The number to which the message was received at. For eg.15671821841
    $to = $req->post('To');

    // Type of the message, For eg. sms
    $type = $req->post('Type');

    // Message content.
    $text = $req->post('Text');

    // A unique ID for the message.
    $message_uuid = $req->post('MessageUUID');
            
    }); 
?>