How to delete user and node, drupal 7? - php

Question

I have created a module which adds a new node(with user info) if a user is added. Now I want to implement a user_delete hook that deletes the node if the user is deleted. I don't know how to implement this.
This code adds a new node for new user:
function user_profile_user_insert(&$edit, $account, $category) {
$node = new stdClass();
$node->type = 'members';
node_object_prepare($node);
//dvm($account);
$node->title = $account->name;
$user_info = user_load($account->uid);
$node->field_user["und"][0]["uid"] = $account->uid;
$path = $account->name;
$node->path = array('alias' => $path);
node_save($node);
}

Answer 1

try this
function node_delete($nid) {
node_delete_multiple(array($nid));
}

Answer 2

for user you can use
user_delete where you pass the $uid as the parameter
as for nodes there is node_delete you pass you pass the $nid as the parameter.
also deleting nodes based on user id there is this function node_user_delete

Answer 3

Until I solved the user reg spam problem with the stop_spam_reg module, I routinely purged the spam accounts like this:
/devel/php
$query = db_select('users', 'u') ->fields('u', array('uid'));
$result = $query->execute();
foreach ($result as $record) {
if( $record->uid>1){ //replace 1 with the latest valid uid you want to keep
user_delete($record->uid);
}
}
Be careful to leave user 1 or you'll have bigger issues than spam users :)