Roe Web Builder - Randomizer Glitch

function randomizer( $page = '', $pattern = null, $inventory = array() )
{
    $nen = nen_ini();

    if( is_null ( $pattern ) )
    {
        return $inventory;
    }

    echo '<div style="font-size:12px;">'. str_replace( '\r\n', '<br>', htmlentities( $page ) ). '</div>';

    if( preg_match_all( $pattern, $page, $matches ) )
    {
        echo '<div style="font-size:24px;">'. $pattern. '</div>';

        var_dump( $matches );
        foreach( $matches as $groups )
        {
            $option_index = 0;
            while( isset( $groups[ 'option'. ( $option_index + 1 ) ] ) )
            {
                $option_index++;
                $inventory[ count( $inventory ) ] = $groups[ 'option'. ( $option_index ) ];
            }
        }
    }
    return $inventory;
}