Revonzy Mini Shell

<?php
	require_once("lib/functions.php");	
	$db = new login_function();

	$current_session = session_id(); 
	
  if(isset($_POST['c_id']) AND isset($_POST['actual_price']) AND isset($_POST['selling_price']) AND isset($_POST['grams']) AND isset($_POST['unit']) AND isset($_POST['p_id'])) {
    $c_id = $_POST['c_id'];
    $actual_price = $_POST['actual_price'];
    $qty = $_POST['qnty'];
    $selling_price = $_POST['selling_price'];  
    $grams = $_POST['grams'];  
    $unit = $_POST['unit'];  
    
    $product_a_price=$db->get_product_price($p_id);
    $product_s_price=$db->get_product_selling_price($p_id);
   
     $actual_price =    $actual_price * $qty;
     $selling_price =   $selling_price * $qty;

    $check_exist = $db->check_product_exist($current_session, $c_id);

    if($check_exist == "") {
        if($db->add_temp_cart($current_session, $c_id, $qty, $actual_price, $selling_price, $grams, $unit)) {
            echo "success";
        } else {
            echo "failed";
        }
    } else {
        if($db->update_cart($current_session, $c_id, $qty, $actual_price,$selling_price)) {
            echo "success";
        } else {
            echo "failed";
        }
    }
}



?>