Unidentified Index Error - php

Question

I am using a plugin for WordPRess called Easy Bootstrap Shortcodes to use Booystrap CSS within wordpress posts. Tabs are one feature I use a lot and when I use the tabs short code, it throws the following error:
Notice: Undefined index: tabs in /home/onedirec/public_html/tester/wp-content/plugins/easy-bootstrap-shortcodes/shortcode/tabs/plugin_shortcode.php on line 38
What's weird is that the tabs and all the information following is rendered apart from an indent that shouldn;t be there. You can see this in action here: http://onedirectionconnection.com/tester/?projects=take-me-home-tour
If anyone could help me figure out what the issue is, it would be greatly appreciated. Here's the code that's causing the error:
<?php
/* * *********************************************************
* jQuery UI Tabs
* ********************************************************* */
$_oscitas_tabs = array();
function osc_theme_tabs($params, $content = null) {
global $_oscitas_tabs;
extract(shortcode_atts(array(
'id' => count($_oscitas_tabs),
'class' => ''
), $params));
$_oscitas_tabs[$id] = array();
do_shortcode($content);
$scontent = '<ul class="nav nav-tabs " id="oscitas-tabs-' . $id . '">' . implode('', $_oscitas_tabs[$id]['tabs']) . '</ul><div
class="tab-content">' . implode('', $_oscitas_tabs[$id]['panes']) . '</div>';
if (trim($scontent) != "") {
$output = '<div class="' . $class . '">' . $scontent;
$output .= '</div>';
return $output;
} else {
return "";
}
}
add_shortcode('tabs', 'osc_theme_tabs');
function osc_theme_tab($params, $content = null) {
global $_oscitas_tabs;
extract(shortcode_atts(array(
'title' => 'title',
'active' => '',
), $params));
$index = count($_oscitas_tabs) - 1;
$pane_id = 'pane-' . $index . '-' . count($_oscitas_tabs[$index]['tabs']);
$_oscitas_tabs[$index]['tabs'][] = '<li class="' . $active . '"><a href="#' . $pane_id . '" data-toggle="tab">' . $title
. '</a></li>';
$_oscitas_tabs[$index]['panes'][] = '<div class="tab-pane ' . $active . '" id="'
. $pane_id . '">'
. do_shortcode
(trim($content)) . '</div>';
}
add_shortcode('tab', 'osc_theme_tab');
And here is line 38 on its own:
$pane_id = 'pane-' . $index . '-' . count($_oscitas_tabs[$index]['tabs']);
I know very little about PHP so if anyone can help me spot the error here, it would be greatly appreciated.

Answer 1

Well I'll just post the answer here since it worked in the comments.
Add this line just before line 38:
$_oscitas_tabs[$index]['tabs'] = array();
Right above this line:
$pane_id = 'pane-' . $index . '-' . count($_oscitas_tabs[$index]['tabs']);
That should stop the PHP notice from appearing.
You could try adding a # right before count()
$pane_id = 'pane-' . $index . '-' . #count($_oscitas_tabs[$index]['tabs']);
It keeps PHP from complaining.