A custom template for wordpress plugin - php

Question

I am searching a solution to add a custom template for plugin on short code. But I am unable to do it successfully.
I have made a template folder in my plugins folder and put a custom template in it. I want to show this template by putting a short code. For this I have written following piece of code.
function wp_parse_login()
{
add_action('template_redirect', 'my_template');
function my_template()
{
include ('template/login.php');
exit;
}
}
add_shortcode('parse_login_page','wp_parse_login');
but it's not working. I have include this file to my main plugin file. I think I am leaving some hooks.

Answer 1

Here an adapted example from WordPress Codex
function wp_parse_login() {
ob_start();
include ('template/login.php');
return ob_get_clean();
}
add_shortcode('parse_login_page','wp_parse_login');

Answer 2

You first set a page template in DB Like:
$table_post_meta = $wpdb->prefix.'postmeta';
$meta_data = array(
'post_id' => $post_id, (Get dynamically post id of a page)
'meta_key' => '_wp_page_template',
'meta_value' => 'template/login.php' (Give the file path)
);
$wpdb->insert($table_post_meta,$meta_data) or die(mysql_error());
The you write in your this code in your template page:
function wp_parse_login() {
ob_start();
include ('template/login.php');
return ob_get_clean();
}
add_shortcode('parse_login_page','wp_parse_login');
Hope you find your solution.