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I'm coding an AJAX chatroom, and I'm storing a list of users online in an xml file. When someone logs on it adds them without any problem, but I'm having a hard time trying to figure out how to remove them from the list when they log out. My code is below, and I am extremely new to XML so please don't laugh at me. Does anyone know how I can make php open the file, delete any nodes where the ip attribute matches the ip of the user, and save the file?
$users = new DomDocument();
$users->load("../data/users.xml");
$xp = new domXPath($users);
$query = "/user[@ip=".$ip."]";
$results = $xp->query($query);
$count = count($results);
for ($j = 0; $j < $count; $j++) {
$users->documentElement->removeChild($results->item($j));
}
$users->save("../data/users.xml"); -
Never mind; SimpleXML to the rescue.
//update users list
$userfile = new DomDocument();
$userfile->load("../data/users.xml");
$suser = simplexml_load_file("../data/users.xml");
$count = 0;
foreach($suser->user as $user) {
if ($user['ip'] == $ip) {
$userfile->documentElement->removeChild($userfile->documentElement->childNodes->item($count));
$count--;
}
$count++;
}
$userfile->save("../data/users.xml"); -
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