I can not save my data from my interface please give me solution. my code <?php if(isset($_POST["submit"])){ $name=$_POST["name"]; $phone=$_POST["phone"]; $email=$_POST["email"]; $password=$_POST["password"]; $address=$_POST["address"]; $db=new MySQLi("localhost","root","","mahafuz"); $db=query("insert into mamun(name,phone,email,password,address)values($name,$phone,$email,$password,$address)"); }else{ echo "Your data is not shown."; } ?> <form action="#" method="post"> <input type="text" name="name" /> Name <br /> <input type="text" name="phone" /> Phone <br /> <input type="text" name="email" /> Email <br /> <input type="password" name="password" />Password <br /> <input type="text" name="address" /> Address <br /> <input type="submit" name="submit" value="Submit" /> </form>