CI_Calendar::generate PHP Method

    public function generate($year = '', $month = '', $data = array())
    {
        $local_time = time();
        // Set and validate the supplied month/year
        if (empty($year)) {
            $year = date('Y', $local_time);
        } elseif (strlen($year) === 1) {
            $year = '200' . $year;
        } elseif (strlen($year) === 2) {
            $year = '20' . $year;
        }
        if (empty($month)) {
            $month = date('m', $local_time);
        } elseif (strlen($month) === 1) {
            $month = '0' . $month;
        }
        $adjusted_date = $this->adjust_date($month, $year);
        $month = $adjusted_date['month'];
        $year = $adjusted_date['year'];
        // Determine the total days in the month
        $total_days = $this->get_total_days($month, $year);
        // Set the starting day of the week
        $start_days = array('sunday' => 0, 'monday' => 1, 'tuesday' => 2, 'wednesday' => 3, 'thursday' => 4, 'friday' => 5, 'saturday' => 6);
        $start_day = isset($start_days[$this->start_day]) ? $start_days[$this->start_day] : 0;
        // Set the starting day number
        $local_date = mktime(12, 0, 0, $month, 1, $year);
        $date = getdate($local_date);
        $day = $start_day + 1 - $date['wday'];
        while ($day > 1) {
            $day -= 7;
        }
        // Set the current month/year/day
        // We use this to determine the "today" date
        $cur_year = date('Y', $local_time);
        $cur_month = date('m', $local_time);
        $cur_day = date('j', $local_time);
        $is_current_month = $cur_year == $year && $cur_month == $month;
        // Generate the template data array
        $this->parse_template();
        // Begin building the calendar output
        $out = $this->replacements['table_open'] . "\n\n" . $this->replacements['heading_row_start'] . "\n";
        // "previous" month link
        if ($this->show_next_prev === TRUE) {
            // Add a trailing slash to the URL if needed
            $this->next_prev_url = preg_replace('/(.+?)\\/*$/', '\\1/', $this->next_prev_url);
            $adjusted_date = $this->adjust_date($month - 1, $year);
            $out .= str_replace('{previous_url}', $this->next_prev_url . $adjusted_date['year'] . '/' . $adjusted_date['month'], $this->replacements['heading_previous_cell']) . "\n";
        }
        // Heading containing the month/year
        $colspan = $this->show_next_prev === TRUE ? 5 : 7;
        $this->replacements['heading_title_cell'] = str_replace('{colspan}', $colspan, str_replace('{heading}', $this->get_month_name($month) . ' ' . $year, $this->replacements['heading_title_cell']));
        $out .= $this->replacements['heading_title_cell'] . "\n";
        // "next" month link
        if ($this->show_next_prev === TRUE) {
            $adjusted_date = $this->adjust_date($month + 1, $year);
            $out .= str_replace('{next_url}', $this->next_prev_url . $adjusted_date['year'] . '/' . $adjusted_date['month'], $this->replacements['heading_next_cell']);
        }
        $out .= "\n" . $this->replacements['heading_row_end'] . "\n\n" . $this->replacements['week_row_start'] . "\n";
        $day_names = $this->get_day_names();
        for ($i = 0; $i < 7; $i++) {
            $out .= str_replace('{week_day}', $day_names[($start_day + $i) % 7], $this->replacements['week_day_cell']);
        }
        $out .= "\n" . $this->replacements['week_row_end'] . "\n";
        // Build the main body of the calendar
        while ($day <= $total_days) {
            $out .= "\n" . $this->replacements['cal_row_start'] . "\n";
            for ($i = 0; $i < 7; $i++) {
                if ($day > 0 && $day <= $total_days) {
                    $out .= $is_current_month === TRUE && $day == $cur_day ? $this->replacements['cal_cell_start_today'] : $this->replacements['cal_cell_start'];
                    if (isset($data[$day])) {
                        // Cells with content
                        $temp = $is_current_month === TRUE && $day == $cur_day ? $this->replacements['cal_cell_content_today'] : $this->replacements['cal_cell_content'];
                        $out .= str_replace(array('{content}', '{day}'), array($data[$day], $day), $temp);
                    } else {
                        // Cells with no content
                        $temp = $is_current_month === TRUE && $day == $cur_day ? $this->replacements['cal_cell_no_content_today'] : $this->replacements['cal_cell_no_content'];
                        $out .= str_replace('{day}', $day, $temp);
                    }
                    $out .= $is_current_month === TRUE && $day == $cur_day ? $this->replacements['cal_cell_end_today'] : $this->replacements['cal_cell_end'];
                } elseif ($this->show_other_days === TRUE) {
                    $out .= $this->replacements['cal_cell_start_other'];
                    if ($day <= 0) {
                        // Day of previous month
                        $prev_month = $this->adjust_date($month - 1, $year);
                        $prev_month_days = $this->get_total_days($prev_month['month'], $prev_month['year']);
                        $out .= str_replace('{day}', $prev_month_days + $day, $this->replacements['cal_cell_other']);
                    } else {
                        // Day of next month
                        $out .= str_replace('{day}', $day - $total_days, $this->replacements['cal_cell_other']);
                    }
                    $out .= $this->replacements['cal_cell_end_other'];
                } else {
                    // Blank cells
                    $out .= $this->replacements['cal_cell_start'] . $this->replacements['cal_cell_blank'] . $this->replacements['cal_cell_end'];
                }
                $day++;
            }
            $out .= "\n" . $this->replacements['cal_row_end'] . "\n";
        }
        return $out .= "\n" . $this->replacements['table_close'];
    }