PHP日历类-tutoriel php-php.cn

下面是CI的日历类，可以参考一下。

/* *
* CodeIgniter
*
* An open source application development framework for PHP 5.1.6 or newer
*
* @package        CodeIgniter
* @author        ExpressionEngine Dev Team
* @copyright    Copyright (c) 2008 - 2011, EllisLab, Inc.
* @license        http://codeigniter.com/user_guide/license.html
* @link        http://codeigniter.com
* @since        Version 1.0
* @filesource
*/

// ------------------------------------------------------------------------

/* *
* CodeIgniter Calendar Class
*
* This class enables the creation of calendars
*
* @package        CodeIgniter
* @subpackage    Libraries
* @category    Libraries
* @author        ExpressionEngine Dev Team
* @link        http://codeigniter.com/user_guide/libraries/calendar.html
*/
class CI_Calendar {

     var $CI;
     var $lang;
     var $local_time;
     var $template        = '';
     var $start_day        = 'sunday';
     var $month_type        = 'long';
     var $day_type        = 'abr';
     var $show_next_prev    = FALSE;
     var $next_prev_url    = '';

     /* *
     * Constructor
     *
     * Loads the calendar language file and sets the default time reference
      */
     public function __construct( $config = array())
    {
         $this->CI =& get_instance();

         if ( ! in_array('calendar_lang.php', $this->CI->lang->is_loaded, TRUE))
        {
             $this->CI->lang->load('calendar');
        }

         $this->local_time = time();

         if ( count( $config) > 0)
        {
             $this->initialize( $config);
        }

        log_message('debug', "Calendar Class Initialized");
    }

     // --------------------------------------------------------------------

     /* *
     * Initialize the user preferences
     *
     * Accepts an associative array as input, containing display preferences
     *
     * @access    public
     * @param    array    config preferences
     * @return    void
      */
     function initialize( $config = array())
    {
         foreach ( $config as $key => $val)
        {
             if ( isset( $this-> $key))
            {
                 $this-> $key = $val;
            }
        }
    }

     // --------------------------------------------------------------------

     /* *
     * Generate the calendar
     *
     * @access    public
     * @param    integer    the year
     * @param    integer    the month
     * @param    array    the data to be shown in the calendar cells
     * @return    string
      */
     function generate( $year = '', $month = '', $data = array())
    {
         // Set and validate the supplied month/year
         if ( $year == '')
             $year  = date("Y", $this->local_time);

         if ( $month == '')
             $month = date("m", $this->local_time);

         if ( strlen( $year) == 1)
             $year = '200'. $year;

         if ( strlen( $year) == 2)
             $year = '20'. $year;

         if ( 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])) ? 0 : $start_days[ $this->start_day];

         // 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", $this->local_time);
         $cur_month    = date("m", $this->local_time);
         $cur_day    = date("j", $this->local_time);

         $is_current_month = ( $cur_year == $year AND $cur_month == $month) ? TRUE : FALSE;

         // Generate the template data array
         $this->parse_template();

         // Begin building the calendar output
         $out = $this->temp['table_open'];
         $out .= "\n";

         $out .= "\n";
         $out .= $this->temp['heading_row_start'];
         $out .= "\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->temp['heading_previous_cell']);
             $out .= "\n";
        }

         // Heading containing the month/year
         $colspan = ( $this->show_next_prev == TRUE) ? 5 : 7;

         $this->temp['heading_title_cell'] = str_replace('{colspan}', $colspan, $this->temp['heading_title_cell']);
         $this->temp['heading_title_cell'] = str_replace('{heading}', $this->get_month_name( $month)." ". $year, $this->temp['heading_title_cell']);

         $out .= $this->temp['heading_title_cell'];
         $out .= "\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->temp['heading_next_cell']);
        }

         $out .= "\n";
         $out .= $this->temp['heading_row_end'];
         $out .= "\n";

         // Write the cells containing the days of the week
         $out .= "\n";
         $out .= $this->temp['week_row_start'];
         $out .= "\n";

         $day_names = $this->get_day_names();

         for ( $i = 0; $i         {
             $out .= str_replace('{week_day}', $day_names[( $start_day + $i) %7], $this->temp['week_day_cell']);
        }

         $out .= "\n";
         $out .= $this->temp['week_row_end'];
         $out .= "\n";

         // Build the main body of the calendar
         while ( $day         {
             $out .= "\n";
             $out .= $this->temp['cal_row_start'];
             $out .= "\n";

             for ( $i = 0; $i             {
                 $out .= ( $is_current_month == TRUE AND $day == $cur_day) ? $this->temp['cal_cell_start_today'] : $this->temp['cal_cell_start'];

                 if ( $day > 0 AND $day                 {
                     if ( isset( $data[ $day]))
                    {
                         // Cells with content
                         $temp = ( $is_current_month == TRUE AND $day == $cur_day) ? $this->temp['cal_cell_content_today'] : $this->temp['cal_cell_content'];
                         $out .= str_replace('{day}', $day, str_replace('{content}', $data[ $day], $temp));
                    }
                     else
                    {
                         // Cells with no content
                         $temp = ( $is_current_month == TRUE AND $day == $cur_day) ? $this->temp['cal_cell_no_content_today'] : $this->temp['cal_cell_no_content'];
                         $out .= str_replace('{day}', $day, $temp);
                    }
                }
                 else
                {
                     // Blank cells
                     $out .= $this->temp['cal_cell_blank'];
                }

                 $out .= ( $is_current_month == TRUE AND $day == $cur_day) ? $this->temp['cal_cell_end_today'] : $this->temp['cal_cell_end'];
                 $day++;
            }

             $out .= "\n";
             $out .= $this->temp['cal_row_end'];
             $out .= "\n";
        }

         $out .= "\n";
         $out .= $this->temp['table_close'];

         return $out;
    }

     // --------------------------------------------------------------------

     /* *
     * Get Month Name
     *
     * Generates a textual month name based on the numeric
     * month provided.
     *
     * @access    public
     * @param    integer    the month
     * @return    string
      */
     function get_month_name( $month)
    {
         if ( $this->month_type == 'short')
        {
             $month_names = array('01' => 'cal_jan', '02' => 'cal_feb', '03' => 'cal_mar', '04' => 'cal_apr', '05' => 'cal_may', '06' => 'cal_jun', '07' => 'cal_jul', '08' => 'cal_aug', '09' => 'cal_sep', '10' => 'cal_oct', '11' => 'cal_nov', '12' => 'cal_dec');
        }
         else
        {
             $month_names = array('01' => 'cal_january', '02' => 'cal_february', '03' => 'cal_march', '04' => 'cal_april', '05' => 'cal_mayl', '06' => 'cal_june', '07' => 'cal_july', '08' => 'cal_august', '09' => 'cal_september', '10' => 'cal_october', '11' => 'cal_november', '12' => 'cal_december');
        }

         $month = $month_names[ $month];

         if ( $this->CI->lang->line( $month) === FALSE)
        {
             return ucfirst( str_replace('cal_', '', $month));
        }

         return $this->CI->lang->line( $month);
    }

     // --------------------------------------------------------------------

     /* *
     * Get Day Names
     *
     * Returns an array of day names (Sunday, Monday, etc.) based
     * on the type.  Options: long, short, abrev
     *
     * @access    public
     * @param    string
     * @return    array
      */
     function get_day_names( $day_type = '')
    {
         if ( $day_type != '')
             $this->day_type = $day_type;

         if ( $this->day_type == 'long')
        {
             $day_names = array('sunday', 'monday', 'tuesday', 'wednesday', 'thursday', 'friday', 'saturday');
        }
         elseif ( $this->day_type == 'short')
        {
             $day_names = array('sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat');
        }
         else
        {
             $day_names = array('su', 'mo', 'tu', 'we', 'th', 'fr', 'sa');
        }

         $days = array();
         foreach ( $day_names as $val)
        {
             $days[] = ( $this->CI->lang->line('cal_'. $val) === FALSE) ? ucfirst( $val) : $this->CI->lang->line('cal_'. $val);
        }

         return $days;
    }

     // --------------------------------------------------------------------

     /* *
     * Adjust Date
     *
     * This function makes sure that we have a valid month/year.
     * For example, if you submit 13 as the month, the year will
     * increment and the month will become January.
     *
     * @access    public
     * @param    integer    the month
     * @param    integer    the year
     * @return    array
      */
     function adjust_date( $month, $year)
    {
         $date = array();

         $date['month']    = $month;
         $date['year']    = $year;

         while ( $date['month'] > 12)
        {
             $date['month'] -= 12;
             $date['year']++;
        }

         while ( $date['month']         {
             $date['month'] += 12;
             $date['year']--;
        }

         if ( strlen( $date['month']) == 1)
        {
             $date['month'] = '0'. $date['month'];
        }

         return $date;
    }

     // --------------------------------------------------------------------

     /* *
     * Total days in a given month
     *
     * @access    public
     * @param    integer    the month
     * @param    integer    the year
     * @return    integer
      */
     function get_total_days( $month, $year)
    {
         $days_in_month    = array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);

         if ( $month  12)
        {
             return 0;
        }

         // Is the year a leap year?
         if ( $month == 2)
        {
             if ( $year % 400 == 0 OR ( $year % 4 == 0 AND $year % 100 != 0))
            {
                 return 29;
            }
        }

         return $days_in_month[ $month - 1];
    }

     // --------------------------------------------------------------------

     /* *
     * Set Default Template Data
     *
     * This is used in the event that the user has not created their own template
     *
     * @access    public
     * @return array
      */
     function default_template()
    {
         return   array (
                        'table_open'                => '

',
                        'heading_row_start'            => '',
                        'heading_previous_cell'        => '',
'heading_title_cell' => '',
'heading_next_cell' => '',
                        'heading_row_end'            => '',
                        'week_row_start'            => '',
                        'week_day_cell'                => '',
                        'week_row_end'                => '',
                        'cal_row_start'                => '',
                        'cal_cell_start'            => '',
                        'cal_cell_end_today'        => '',
                        'cal_row_end'                => '',
                        'table_close'                => '

<<	{heading}	>>
{week_day}
', 'cal_cell_start_today' => '	', 'cal_cell_content' => '{day}', 'cal_cell_content_today' => '{day}', 'cal_cell_no_content' => '{day}', 'cal_cell_no_content_today' => '{day}', 'cal_cell_blank' => ' ', 'cal_cell_end' => '

'
                    );
    }

     // --------------------------------------------------------------------

     /* *
     * Parse Template
     *
     * Harvests the data within the template {pseudo-variables}
     * used to display the calendar
     *
     * @access    public
     * @return    void
      */
     function parse_template()
    {
         $this->temp = $this->default_template();

         if ( $this->template == '')
        {
             return;
        }

         $today = array('cal_cell_start_today', 'cal_cell_content_today', 'cal_cell_no_content_today', 'cal_cell_end_today');

         foreach ( array('table_open', 'table_close', 'heading_row_start', 'heading_previous_cell', 'heading_title_cell', 'heading_next_cell', 'heading_row_end', 'week_row_start', 'week_day_cell', 'week_row_end', 'cal_row_start', 'cal_cell_start', 'cal_cell_content', 'cal_cell_no_content',  'cal_cell_blank', 'cal_cell_end', 'cal_row_end', 'cal_cell_start_today', 'cal_cell_content_today', 'cal_cell_no_content_today', 'cal_cell_end_today') as $val)
        {
             if ( preg_match("/\{". $val."\}(.*?)\{\/". $val."\}/si", $this->template, $match))
            {
                 $this->temp[ $val] = $match['1'];
            }
             else
            {
                 if ( in_array( $val, $today, TRUE))
                {
                     $this->temp[ $val] = $this->temp[ str_replace('_today', '', $val)];
                }
            }
        }
    }

}

// END CI_Calendar class

/* End of file Calendar.php */
/* Location: ./system/libraries/Calendar.php */