public static function getInstance()
{
if (self::$_instance === null) {
self::$_instance = new self();
}
return self::$_instance;
}
public static function getCitiesData()
{
if (!self::$cities_data) {
$query = "select 0 selected, c.id, c.name from cities c";
self::$cities_data = cDB::fetch($query);
}
return self::$cities_data;
}
<?php
include_once 'cMainModel.php';
cDB::init();
if (isset($_GET['get_users_data'])) {
$data = array('root' => array_values(cMainModel::getUsersData()));
} elseif (isset($_GET['get_educations_data'])) {
$data = array('root' => cMainModel::getEducationData());
} elseif (isset($_GET['get_cities_data'])) {
$data = array('root' => cMainModel::getCitiesData());
} elseif (isset($_GET['change_user_education'])) {
cMainModel::setUserEducation($_REQUEST['user_id'], $_REQUEST['education_id']);
$data = array('success' => true);
}
echo json_encode($data);