PHP Notices for Undefined variables

I was able to narrow the issue down to this function;

add_action( 'wp_head', 'faq_option_script' );
function faq_option_script()
{
	$option = 'faq_option';
	$faq_options = get_option( $option, $default );
	$data_disabled = $faq_options['faq_disabled'];
	$data_collapsible = $faq_options['faq_collapsible'];
	$data_animate = $faq_options['faq_animate'];
	$data_active = $faq_options['faq_active'];

	$data  = '';
    $data .= 'data-active="'.( $data_disabled    == "1"  ? 'true' : 'false' ).'" ';
    $data .= 'data-animate="'.   ( $data_animate  == "0"  ? 'false' : 'true' ).'" ';
    $data .= 'data-collapsible="'.  ( $data_collapsible == "1"  ? 'true' : 'false' ).'"';

    $id     = "faq-accordion-1";
    $class  = 'faq-plugin-accordion';

    $rv .= '<div id="'.$id.'" class="'.$class.'" '.$data.'>';
    $rv .= $content;
    $rv .= '</div>';
    $rv .= "\n";
    echo $rv;
}

Which I’ve amended as follows,
1. Dropped the $default as I’m unsure what it should be.
*If someone can inform me of what the defaults are that would appreciate.
2. Instantiated an empty string for the $rv variable before use.
$rv = ”;
3. Removed the reference to $content as it doesn’t exist.
* If someone can inform me of what the $content should be set to that’s be great.

So my ‘fixed’ version of the code is below;

add_action( 'wp_head', 'faq_option_script' );
function faq_option_script()
{
	$option = 'faq_option';
	$faq_options = get_option( $option );
	$data_disabled = $faq_options['faq_disabled'];
	$data_collapsible = $faq_options['faq_collapsible'];
	$data_animate = $faq_options['faq_animate'];
	$data_active = $faq_options['faq_active'];

	$data  = '';
    $data .= 'data-active="'.( $data_disabled    == "1"  ? 'true' : 'false' ).'" ';
    $data .= 'data-animate="'.   ( $data_animate  == "0"  ? 'false' : 'true' ).'" ';
    $data .= 'data-collapsible="'.  ( $data_collapsible == "1"  ? 'true' : 'false' ).'"';

    $id     = "faq-accordion-1";
    $class  = 'faq-plugin-accordion';

    echo '<div id="'.$id.'" class="'.$class.'" '.$data.'></div>';
}

Feedback? Can this be merged with the core or a proper fix be applied for next update please.
Thank you

Another similar issue with that function cropped up here;
[25-Sep-2015 19:18:13 UTC] PHP Notice: Undefined index: faq_disabled in /home/ljlee/public_html/wp-content/plugins/sp-faq/faq.php on line 128

As there’s no faq_disabled option on the settings page I’m not sure what it’s referring to, so I’ve removed it and replaced with faq_active in it’s one use;

add_action( 'wp_head', 'faq_option_script' );
function faq_option_script()
{
	$option = 'faq_option';
	$faq_options = get_option( $option );
	$data_collapsible = $faq_options['faq_collapsible'];
	$data_animate = $faq_options['faq_animate'];
	$data_active = $faq_options['faq_active'];

	$data  = '';
    $data .= 'data-active="'.( $data_active    == "1"  ? 'true' : 'false' ).'" ';
    $data .= 'data-animate="'.   ( $data_animate  == "0"  ? 'false' : 'true' ).'" ';
    $data .= 'data-collapsible="'.  ( $data_collapsible == "1"  ? 'true' : 'false' ).'"';

    $id     = "faq-accordion-1";
    $class  = 'faq-plugin-accordion';

    echo '<div id="'.$id.'" class="'.$class.'" '.$data.'></div>';
}

Hello,

Thank you so much for showing me these bugs. I have fixed many bugs in this plugin. Let me check it again and update with a new version.

Thanks again.

I have added V3.1
Please download it again and test from your side.

Thanks again.

Thanks @sptechnolab, it’s working without errors now.
Resolving ticket.
Appreciated