Retrieving uuid from mysql query - php

Question

I assign uuid() to the id field. It works perfectly. But I don't know how to echo the generated uuid back to the user. How can I do this?
My code:
<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDBPDO";
try {
$conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
// set the PDO error mode to exception
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
// prepare sql and bind parameters
$stmt = $conn->prepare("INSERT INTO MyGuests (id,firstname, lastname, email)
VALUES (UUID(),:firstname, :lastname, :email)");
$stmt->bindParam(':firstname', $firstname);
$stmt->bindParam(':lastname', $lastname);
$stmt->bindParam(':email', $email);
// insert a row
$firstname = "John";
$lastname = "Doe";
$email = "john#example.com";
$stmt->execute();
echo "New records created successfully";
}
catch(PDOException $e)
{
echo "Error: " . $e->getMessage();
}
$conn = null;
?>

Answer 1

You can't.
Your only choice is separating this into two queries.
SELECT UUID()
Retrieve created UUID into a php variable ($uuid)
Insert that variable into your prepared statement.
$stmt = $conn->prepare("INSERT INTO MyGuests (id,firstname, lastname, email)
VALUES (:uuid,:firstname, :lastname, :email)");
$stmt->bindParam(':uuid', $uuid);
$stmt->bindParam(':firstname', $firstname);
$stmt->bindParam(':lastname', $lastname);
$stmt->bindParam(':email', $email);