611 lines
13 KiB
PHP
611 lines
13 KiB
PHP
<?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,
|
|
'UP10' => +10,
|
|
'UP105' => +10.5,
|
|
'UP11' => +11,
|
|
'UP115' => +11.5,
|
|
'UP12' => +12,
|
|
'UP1275' => +12.75,
|
|
'UP13' => +13,
|
|
'UP14' => +14
|
|
);
|
|
|
|
if ($tz == '')
|
|
{
|
|
return $zones;
|
|
}
|
|
|
|
if ($tz == 'GMT')
|
|
$tz = 'UTC';
|
|
|
|
return ( ! isset($zones[$tz])) ? 0 : $zones[$tz];
|
|
}
|
|
}
|
|
|
|
|
|
/* End of file date_helper.php */
|
|
/* Location: ./system/helpers/date_helper.php */ |