Как дать в xml auto increment id?

Question

[Sevo21]

<?php

$xmlFile = simplexml_load_file("AccountInfo.xml");
$xmlLocalCopy = new SimpleXMLElement($xmlFile->asXML());
$password = md5($_POST["password"]);
$firstname = $_POST['firstname'];
$lastname = $_POST['lastname'];
$password = $_POST['password'];
$gender = $_POST['gender'];
$email = $_POST['email'];
foreach ($xmlFile->children() as $child) {
if ($child->email == $_POST["email"]) {
$exit = true;
$newError = "Email already exists";
if ($exit) {
include("view/index.html");
}

}
}
if(!$exit) {
$ids = $newAcct = $xmlLocalCopy->addChild->xpath("user");
$newAcct->addChild("firstname", $firstname);
$newAcct->addChild("lastname", $lastname);
$newAcct->addChild("email", $email);
$newAcct->addChild("password", $password);
$newAcct->addChild("gender", $gender);
$dom = new DOMDocument('1.0');
$dom->preserveWhiteSpace = false;
$dom->formatOutput = true;
$dom->loadXML($xmlLocalCopy->asXML());
$dom->save("AccountInfo.xml");
}

Answer 1

[Ernest Fayzullin]

foreach ($xmlFile->children() as $key => $child) {
// ...
$child->setAttribute("id", $key + 1);
// ...
}