Create topic in phpBB3 by php file

I am trying to create topics in phpBB3 forums by a php file.

I found this

Creating a forum in phpBB3 from PHP and settings permissions

But when i copy this and running my php file i am getting this

  PHP Notice:  Use of undefined constant FORUMS_TABLE - assumed 'FORUMS_TABLE' in /var/www/html/phpvibe/forum/insertPhpbb.php on line 13
  PHP Fatal error:  Call to a member function sql_build_array() on a non-object in /var/www/html/phpvibe/forum/insertPhpbb.php on line 14

I also found this

https://wiki.phpbb.com/Using_phpBB3%27s_Basic_Functions

After that i wrote this code:-

<?php
require_once("/var/www/html/phpvibe/forum/includes/functions.php");
require_once("/var/www/html/phpvibe/forum/includes/functions_posting.php"    );
// note that multibyte support is enabled here 
$my_subject = "test";
$my_text    = "testdata";
// variables to hold the parameters for submit_post
$poll = $uid = $bitfield = $options = ''; 
generate_text_for_storage($my_subject, $uid, $bitfield, $options, false, false, false);
generate_text_for_storage($my_text, $uid, $bitfield, $options, true, true, true);

$data = array( 
    'forum_id'      => 2,
    'icon_id'       => false,

    'enable_bbcode'     => true,
    'enable_smilies'    => true,
    'enable_urls'       => true,
    'enable_sig'        => true,

    'message'       => $my_text,
    'message_md5'   => md5($my_text),

    'bbcode_bitfield'   => $bitfield,
    'bbcode_uid'        => $uid,

    'post_edit_locked'  => 0,
    'topic_title'       => $my_subject,
    'notify_set'        => false,
    'notify'            => false,
    'post_time'         => 0,
    'forum_name'        => '',
    'enable_indexing'   => true,
);

print_r(submit_post('post', $my_subject, '', POST_NORMAL, $poll, $data));
?>

But no topics is created in forum. I also checked 'phpbb_topics' and phpbb_posts table my data is not inserted there.

Got it.

We need to add these piece of code at the top of the script and need to remove our extra 'require_once'.

define('IN_PHPBB', true);
$phpbb_root_path = './';
$phpEx = substr(strrchr(__FILE__, '.') , 1);
error_reporting(0);
include ($phpbb_root_path . 'common.' . $phpEx);

include ($phpbb_root_path . 'includes/functions_posting.' . $phpEx);

$user->session_begin();
$auth->acl($user->data);
$user->setup();