PHP日历类

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 < 7; $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 <= $total_days)
{
$out .= "\n";
$out .= $this->temp['cal_row_start'];
$out .= "\n";

for ( $i = 0; $i < 7; $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 <= $total_days)
{
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'] <= 0)
{
$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 < 1 OR $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 */