} catch (PAException $e) {
$json_string = '{ "is_error" : true, "errors" : "' . $e->message . '"}';
}
print $json_string;
/**
* Updating the list or category of links
*/
} else {
if (!empty($_POST) && $_POST['form_action'] == 'edit_list') {
if (!empty($_POST['updated_category_name'])) {
$Links = new Links();
$Links->user_id = $_SESSION['user']['id'];
$Links->category_name = $_POST['updated_category_name'];
$Links->category_id = $_POST['category_id'];
try {
$Links->update_category();
$json_string = '{ "errors" : "List has been updated successfully", "updated_category_id" : ' . $_POST['category_id'] . '}';
} catch (PAException $e) {
$json_string = '{ "is_error" : true, "errors" : "List with specified name already exists"}';
}
print $json_string;
}
} else {
if (!empty($_POST) && $_POST['form_action'] == 'create_list') {
$json_string = null;
if (!empty($_POST['category_name'])) {
$Links = new Links();
$Links->user_id = $_SESSION['user']['id'];
$Links->category_name = $_POST['category_name'];
try {
$category_id = $Links->save_category();
