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611 lines
13 KiB
611 lines
13 KiB
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); |
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/** |
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* CodeIgniter |
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* |
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* An open source application development framework for PHP 5.1.6 or newer |
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* |
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* @package CodeIgniter |
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* @author ExpressionEngine Dev Team |
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* @copyright Copyright (c) 2008 - 2011, EllisLab, Inc. |
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* @license http://codeigniter.com/user_guide/license.html |
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* @link http://codeigniter.com |
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* @since Version 1.0 |
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* @filesource |
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*/ |
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// ------------------------------------------------------------------------ |
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/** |
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* CodeIgniter Date Helpers |
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* |
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* @package CodeIgniter |
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* @subpackage Helpers |
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* @category Helpers |
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* @author ExpressionEngine Dev Team |
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* @link http://codeigniter.com/user_guide/helpers/date_helper.html |
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*/ |
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// ------------------------------------------------------------------------ |
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/** |
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* Get "now" time |
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* |
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* Returns time() or its GMT equivalent based on the config file preference |
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* |
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* @access public |
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* @return integer |
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*/ |
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if ( ! function_exists('now')) |
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{ |
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function now() |
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{ |
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$CI =& get_instance(); |
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if (strtolower($CI->config->item('time_reference')) == 'gmt') |
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{ |
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$now = time(); |
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$system_time = mktime(gmdate("H", $now), gmdate("i", $now), gmdate("s", $now), gmdate("m", $now), gmdate("d", $now), gmdate("Y", $now)); |
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if (strlen($system_time) < 10) |
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{ |
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$system_time = time(); |
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log_message('error', 'The Date class could not set a proper GMT timestamp so the local time() value was used.'); |
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} |
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return $system_time; |
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} |
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else |
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{ |
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return time(); |
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} |
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} |
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} |
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// ------------------------------------------------------------------------ |
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/** |
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* Convert MySQL Style Datecodes |
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* |
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* This function is identical to PHPs date() function, |
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* except that it allows date codes to be formatted using |
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* the MySQL style, where each code letter is preceded |
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* with a percent sign: %Y %m %d etc... |
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* |
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* The benefit of doing dates this way is that you don't |
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* have to worry about escaping your text letters that |
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* match the date codes. |
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* |
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* @access public |
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* @param string |
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* @param integer |
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* @return integer |
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*/ |
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if ( ! function_exists('mdate')) |
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{ |
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function mdate($datestr = '', $time = '') |
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{ |
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if ($datestr == '') |
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return ''; |
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if ($time == '') |
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$time = now(); |
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$datestr = str_replace('%\\', '', preg_replace("/([a-z]+?){1}/i", "\\\\\\1", $datestr)); |
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return date($datestr, $time); |
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} |
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} |
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// ------------------------------------------------------------------------ |
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/** |
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* Standard Date |
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* |
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* Returns a date formatted according to the submitted standard. |
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* |
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* @access public |
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* @param string the chosen format |
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* @param integer Unix timestamp |
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* @return string |
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*/ |
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if ( ! function_exists('standard_date')) |
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{ |
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function standard_date($fmt = 'DATE_RFC822', $time = '') |
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{ |
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$formats = array( |
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'DATE_ATOM' => '%Y-%m-%dT%H:%i:%s%Q', |
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'DATE_COOKIE' => '%l, %d-%M-%y %H:%i:%s UTC', |
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'DATE_ISO8601' => '%Y-%m-%dT%H:%i:%s%Q', |
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'DATE_RFC822' => '%D, %d %M %y %H:%i:%s %O', |
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'DATE_RFC850' => '%l, %d-%M-%y %H:%i:%s UTC', |
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'DATE_RFC1036' => '%D, %d %M %y %H:%i:%s %O', |
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'DATE_RFC1123' => '%D, %d %M %Y %H:%i:%s %O', |
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'DATE_RSS' => '%D, %d %M %Y %H:%i:%s %O', |
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'DATE_W3C' => '%Y-%m-%dT%H:%i:%s%Q' |
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); |
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if ( ! isset($formats[$fmt])) |
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{ |
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return FALSE; |
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} |
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return mdate($formats[$fmt], $time); |
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} |
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} |
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// ------------------------------------------------------------------------ |
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/** |
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* Timespan |
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* |
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* Returns a span of seconds in this format: |
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* 10 days 14 hours 36 minutes 47 seconds |
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* |
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* @access public |
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* @param integer a number of seconds |
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* @param integer Unix timestamp |
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* @return integer |
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*/ |
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if ( ! function_exists('timespan')) |
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{ |
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function timespan($seconds = 1, $time = '') |
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{ |
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$CI =& get_instance(); |
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$CI->lang->load('date'); |
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if ( ! is_numeric($seconds)) |
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{ |
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$seconds = 1; |
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} |
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if ( ! is_numeric($time)) |
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{ |
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$time = time(); |
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} |
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if ($time <= $seconds) |
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{ |
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$seconds = 1; |
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} |
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else |
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{ |
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$seconds = $time - $seconds; |
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} |
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$str = ''; |
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$years = floor($seconds / 31536000); |
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if ($years > 0) |
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{ |
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$str .= $years.' '.$CI->lang->line((($years > 1) ? 'date_years' : 'date_year')).', '; |
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} |
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$seconds -= $years * 31536000; |
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$months = floor($seconds / 2628000); |
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if ($years > 0 OR $months > 0) |
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{ |
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if ($months > 0) |
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{ |
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$str .= $months.' '.$CI->lang->line((($months > 1) ? 'date_months' : 'date_month')).', '; |
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} |
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$seconds -= $months * 2628000; |
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} |
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$weeks = floor($seconds / 604800); |
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if ($years > 0 OR $months > 0 OR $weeks > 0) |
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{ |
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if ($weeks > 0) |
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{ |
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$str .= $weeks.' '.$CI->lang->line((($weeks > 1) ? 'date_weeks' : 'date_week')).', '; |
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} |
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$seconds -= $weeks * 604800; |
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} |
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$days = floor($seconds / 86400); |
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if ($months > 0 OR $weeks > 0 OR $days > 0) |
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{ |
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if ($days > 0) |
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{ |
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$str .= $days.' '.$CI->lang->line((($days > 1) ? 'date_days' : 'date_day')).', '; |
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} |
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$seconds -= $days * 86400; |
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} |
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$hours = floor($seconds / 3600); |
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if ($days > 0 OR $hours > 0) |
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{ |
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if ($hours > 0) |
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{ |
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$str .= $hours.' '.$CI->lang->line((($hours > 1) ? 'date_hours' : 'date_hour')).', '; |
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} |
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$seconds -= $hours * 3600; |
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} |
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$minutes = floor($seconds / 60); |
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if ($days > 0 OR $hours > 0 OR $minutes > 0) |
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{ |
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if ($minutes > 0) |
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{ |
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$str .= $minutes.' '.$CI->lang->line((($minutes > 1) ? 'date_minutes' : 'date_minute')).', '; |
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} |
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$seconds -= $minutes * 60; |
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} |
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if ($str == '') |
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{ |
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$str .= $seconds.' '.$CI->lang->line((($seconds > 1) ? 'date_seconds' : 'date_second')).', '; |
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} |
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return substr(trim($str), 0, -1); |
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} |
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} |
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// ------------------------------------------------------------------------ |
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/** |
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* Number of days in a month |
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* |
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* Takes a month/year as input and returns the number of days |
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* for the given month/year. Takes leap years into consideration. |
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* |
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* @access public |
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* @param integer a numeric month |
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* @param integer a numeric year |
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* @return integer |
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*/ |
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if ( ! function_exists('days_in_month')) |
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{ |
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function days_in_month($month = 0, $year = '') |
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{ |
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if ($month < 1 OR $month > 12) |
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{ |
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return 0; |
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} |
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if ( ! is_numeric($year) OR strlen($year) != 4) |
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{ |
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$year = date('Y'); |
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} |
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if ($month == 2) |
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{ |
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if ($year % 400 == 0 OR ($year % 4 == 0 AND $year % 100 != 0)) |
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{ |
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return 29; |
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} |
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} |
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$days_in_month = array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31); |
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return $days_in_month[$month - 1]; |
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} |
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} |
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// ------------------------------------------------------------------------ |
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/** |
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* Converts a local Unix timestamp to GMT |
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* |
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* @access public |
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* @param integer Unix timestamp |
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* @return integer |
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*/ |
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if ( ! function_exists('local_to_gmt')) |
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{ |
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function local_to_gmt($time = '') |
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{ |
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if ($time == '') |
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$time = time(); |
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return mktime( gmdate("H", $time), gmdate("i", $time), gmdate("s", $time), gmdate("m", $time), gmdate("d", $time), gmdate("Y", $time)); |
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} |
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} |
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// ------------------------------------------------------------------------ |
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/** |
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* Converts GMT time to a localized value |
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* |
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* Takes a Unix timestamp (in GMT) as input, and returns |
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* at the local value based on the timezone and DST setting |
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* submitted |
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* |
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* @access public |
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* @param integer Unix timestamp |
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* @param string timezone |
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* @param bool whether DST is active |
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* @return integer |
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*/ |
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if ( ! function_exists('gmt_to_local')) |
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{ |
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function gmt_to_local($time = '', $timezone = 'UTC', $dst = FALSE) |
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{ |
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if ($time == '') |
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{ |
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return now(); |
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} |
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$time += timezones($timezone) * 3600; |
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if ($dst == TRUE) |
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{ |
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$time += 3600; |
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} |
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return $time; |
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} |
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} |
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// ------------------------------------------------------------------------ |
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/** |
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* Converts a MySQL Timestamp to Unix |
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* |
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* @access public |
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* @param integer Unix timestamp |
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* @return integer |
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*/ |
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if ( ! function_exists('mysql_to_unix')) |
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{ |
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function mysql_to_unix($time = '') |
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{ |
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// We'll remove certain characters for backward compatibility |
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// since the formatting changed with MySQL 4.1 |
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// YYYY-MM-DD HH:MM:SS |
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$time = str_replace('-', '', $time); |
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$time = str_replace(':', '', $time); |
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$time = str_replace(' ', '', $time); |
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// YYYYMMDDHHMMSS |
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return mktime( |
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substr($time, 8, 2), |
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substr($time, 10, 2), |
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substr($time, 12, 2), |
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substr($time, 4, 2), |
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substr($time, 6, 2), |
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substr($time, 0, 4) |
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); |
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} |
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} |
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// ------------------------------------------------------------------------ |
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/** |
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* Unix to "Human" |
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* |
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* Formats Unix timestamp to the following prototype: 2006-08-21 11:35 PM |
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* |
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* @access public |
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* @param integer Unix timestamp |
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* @param bool whether to show seconds |
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* @param string format: us or euro |
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* @return string |
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*/ |
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if ( ! function_exists('unix_to_human')) |
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{ |
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function unix_to_human($time = '', $seconds = FALSE, $fmt = 'us') |
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{ |
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$r = date('Y', $time).'-'.date('m', $time).'-'.date('d', $time).' '; |
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if ($fmt == 'us') |
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{ |
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$r .= date('h', $time).':'.date('i', $time); |
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} |
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else |
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{ |
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$r .= date('H', $time).':'.date('i', $time); |
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} |
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if ($seconds) |
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{ |
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$r .= ':'.date('s', $time); |
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} |
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if ($fmt == 'us') |
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{ |
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$r .= ' '.date('A', $time); |
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} |
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return $r; |
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} |
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} |
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// ------------------------------------------------------------------------ |
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/** |
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* Convert "human" date to GMT |
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* |
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* Reverses the above process |
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* |
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* @access public |
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* @param string format: us or euro |
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* @return integer |
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*/ |
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if ( ! function_exists('human_to_unix')) |
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{ |
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function human_to_unix($datestr = '') |
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{ |
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if ($datestr == '') |
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{ |
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return FALSE; |
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} |
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$datestr = trim($datestr); |
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$datestr = preg_replace("/\040+/", ' ', $datestr); |
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if ( ! preg_match('/^[0-9]{2,4}\-[0-9]{1,2}\-[0-9]{1,2}\s[0-9]{1,2}:[0-9]{1,2}(?::[0-9]{1,2})?(?:\s[AP]M)?$/i', $datestr)) |
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{ |
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return FALSE; |
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} |
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$split = explode(' ', $datestr); |
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$ex = explode("-", $split['0']); |
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$year = (strlen($ex['0']) == 2) ? '20'.$ex['0'] : $ex['0']; |
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$month = (strlen($ex['1']) == 1) ? '0'.$ex['1'] : $ex['1']; |
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$day = (strlen($ex['2']) == 1) ? '0'.$ex['2'] : $ex['2']; |
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$ex = explode(":", $split['1']); |
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$hour = (strlen($ex['0']) == 1) ? '0'.$ex['0'] : $ex['0']; |
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$min = (strlen($ex['1']) == 1) ? '0'.$ex['1'] : $ex['1']; |
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if (isset($ex['2']) && preg_match('/[0-9]{1,2}/', $ex['2'])) |
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{ |
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$sec = (strlen($ex['2']) == 1) ? '0'.$ex['2'] : $ex['2']; |
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} |
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else |
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{ |
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// Unless specified, seconds get set to zero. |
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$sec = '00'; |
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} |
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if (isset($split['2'])) |
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{ |
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$ampm = strtolower($split['2']); |
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if (substr($ampm, 0, 1) == 'p' AND $hour < 12) |
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$hour = $hour + 12; |
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if (substr($ampm, 0, 1) == 'a' AND $hour == 12) |
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$hour = '00'; |
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if (strlen($hour) == 1) |
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$hour = '0'.$hour; |
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} |
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return mktime($hour, $min, $sec, $month, $day, $year); |
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} |
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} |
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// ------------------------------------------------------------------------ |
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/** |
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* Timezone Menu |
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* |
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* Generates a drop-down menu of timezones. |
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* |
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* @access public |
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* @param string timezone |
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* @param string classname |
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* @param string menu name |
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* @return string |
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*/ |
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if ( ! function_exists('timezone_menu')) |
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{ |
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function timezone_menu($default = 'UTC', $class = "", $name = 'timezones') |
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{ |
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$CI =& get_instance(); |
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$CI->lang->load('date'); |
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if ($default == 'GMT') |
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$default = 'UTC'; |
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$menu = '<select name="'.$name.'"'; |
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if ($class != '') |
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{ |
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$menu .= ' class="'.$class.'"'; |
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} |
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$menu .= ">\n"; |
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foreach (timezones() as $key => $val) |
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{ |
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$selected = ($default == $key) ? " selected='selected'" : ''; |
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$menu .= "<option value='{$key}'{$selected}>".$CI->lang->line($key)."</option>\n"; |
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} |
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$menu .= "</select>"; |
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return $menu; |
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} |
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} |
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// ------------------------------------------------------------------------ |
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/** |
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* Timezones |
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* |
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* Returns an array of timezones. This is a helper function |
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* for various other ones in this library |
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* |
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* @access public |
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* @param string timezone |
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* @return string |
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*/ |
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if ( ! function_exists('timezones')) |
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{ |
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function timezones($tz = '') |
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{ |
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// Note: Don't change the order of these even though |
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// some items appear to be in the wrong order |
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$zones = array( |
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'UM12' => -12, |
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'UM11' => -11, |
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'UM10' => -10, |
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'UM95' => -9.5, |
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'UM9' => -9, |
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'UM8' => -8, |
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'UM7' => -7, |
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'UM6' => -6, |
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'UM5' => -5, |
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'UM45' => -4.5, |
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'UM4' => -4, |
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'UM35' => -3.5, |
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'UM3' => -3, |
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'UM2' => -2, |
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'UM1' => -1, |
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'UTC' => 0, |
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'UP1' => +1, |
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'UP2' => +2, |
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'UP3' => +3, |
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'UP35' => +3.5, |
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'UP4' => +4, |
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'UP45' => +4.5, |
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'UP5' => +5, |
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'UP55' => +5.5, |
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'UP575' => +5.75, |
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'UP6' => +6, |
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'UP65' => +6.5, |
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'UP7' => +7, |
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'UP8' => +8, |
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'UP875' => +8.75, |
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'UP9' => +9, |
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'UP95' => +9.5, |
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'UP10' => +10, |
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'UP105' => +10.5, |
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'UP11' => +11, |
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'UP115' => +11.5, |
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'UP12' => +12, |
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'UP1275' => +12.75, |
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'UP13' => +13, |
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'UP14' => +14 |
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); |
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if ($tz == '') |
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{ |
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return $zones; |
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} |
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if ($tz == 'GMT') |
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$tz = 'UTC'; |
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return ( ! isset($zones[$tz])) ? 0 : $zones[$tz]; |
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} |
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} |
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/* End of file date_helper.php */ |
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/* Location: ./system/helpers/date_helper.php */ |