A FATAL ERROR while submitting the signup form in PHP - mysqli

Question

I'm a student and I was writing a signup script but I don't know why I'm getting this error, according to me every thing is fine and PHPStrom v2018.3.1 also not showing me any sign of error but when I submit the form I get this error.
Error:"Fatal error: Uncaught Error: Function name must be a string in D:\xampp\htdocs\electronic_store\signup.php:26 Stack trace: #0 {main} thrown in D:\xampp\htdocs\electronic_store\signup.php on line 26".
CODE:
if(isset($_REQUEST['btnRegister']))
{
$id = rand(1111,9999);
$name = $_POST('name');
$email = $_POST('email');
$password = md5($_POST('password'));
$phone = $_POST('phone');
if(mysqli_query($con,"insert into register values('$id','$name','$password','$email','$phone','employee')"))
{
echo "<script>alert('Register Successfully');</script>";
}
else
{
echo "<script>alert('Error');</script>";
}
}

Answer 1

$_POST should be with square brackets not round brackets that's why it is returning errors.
$name = $_POST['name'];
$email = $_POST['email'];
$password = md5($_POST['password']);
$phone = $_POST['phone'];