storing XML value to a session variable - php

Question

been trying to store a value from an XML file however it releases an error.
how can i solve this ?
<?php
session_start();
$success = 0;
session_unset();
$clients= simplexml_load_file('client.xml');
if(isset($_POST['submit'])){
foreach($clients -> client_info as $client){
if($_POST['username'] == $client->username && $_POST['pwd'] == $client->pwd ){
$success = $success + 1;
$_SESSION["id"] = $client['id'];
break;
}
}
}
if (isset($_SESSION["id"])) {
echo $_SESSION["id"];
}
else {
echo "no session";
}
thats the code.
however the problem is that when i go outside for example
<?php
session_start();
echo $_SESSION["id"];
?>
it says undefined id.
any solutions to this problem?

Answer 1

If you need to save a complete element of the simplexml_load_file() result use the asXML() method (formatting the element as XML string). To store the string value of any content element use the __toString() method:
Example:
$_SESSION["id"] = $client['id']->__toString(); //for attributes
If you want to save the text content of a xml tag:
$_SESSION["clientContent"] = $client->__toString(); //text content of client tag
To save an entire xml section as XML string:
$_SESSION["client"] = $client->asXML(); //for elements
and to restore the $client variable:
$client=simplexml_load_string($_SESSION["client"]); //$client as object again