/system/helpers/date_helper.php
PHP | 611 lines | 457 code | 51 blank | 103 comment | 48 complexity | beacd3563bf52f3ebb770d0736071fae MD5 | raw file
- <?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
- /**
- * CodeIgniter
- *
- * An open source application development framework for PHP 5.1.6 or newer
- *
- * @package CodeIgniter
- * @author ExpressionEngine Dev Team
- * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc.
- * @license http://codeigniter.com/user_guide/license.html
- * @link http://codeigniter.com
- * @since Version 1.0
- * @filesource
- */
-
- // ------------------------------------------------------------------------
-
- /**
- * CodeIgniter Date Helpers
- *
- * @package CodeIgniter
- * @subpackage Helpers
- * @category Helpers
- * @author ExpressionEngine Dev Team
- * @link http://codeigniter.com/user_guide/helpers/date_helper.html
- */
-
- // ------------------------------------------------------------------------
-
- /**
- * Get "now" time
- *
- * Returns time() or its GMT equivalent based on the config file preference
- *
- * @access public
- * @return integer
- */
- if ( ! function_exists('now'))
- {
- function now()
- {
- $CI =& get_instance();
-
- if (strtolower($CI->config->item('time_reference')) == 'gmt')
- {
- $now = time();
- $system_time = mktime(gmdate("H", $now), gmdate("i", $now), gmdate("s", $now), gmdate("m", $now), gmdate("d", $now), gmdate("Y", $now));
-
- if (strlen($system_time) < 10)
- {
- $system_time = time();
- log_message('error', 'The Date class could not set a proper GMT timestamp so the local time() value was used.');
- }
-
- return $system_time;
- }
- else
- {
- return time();
- }
- }
- }
-
- // ------------------------------------------------------------------------
-
- /**
- * Convert MySQL Style Datecodes
- *
- * This function is identical to PHPs date() function,
- * except that it allows date codes to be formatted using
- * the MySQL style, where each code letter is preceded
- * with a percent sign: %Y %m %d etc...
- *
- * The benefit of doing dates this way is that you don't
- * have to worry about escaping your text letters that
- * match the date codes.
- *
- * @access public
- * @param string
- * @param integer
- * @return integer
- */
- if ( ! function_exists('mdate'))
- {
- function mdate($datestr = '', $time = '')
- {
- if ($datestr == '')
- return '';
-
- if ($time == '')
- $time = now();
-
- $datestr = str_replace('%\\', '', preg_replace("/([a-z]+?){1}/i", "\\\\\\1", $datestr));
- return date($datestr, $time);
- }
- }
-
- // ------------------------------------------------------------------------
-
- /**
- * Standard Date
- *
- * Returns a date formatted according to the submitted standard.
- *
- * @access public
- * @param string the chosen format
- * @param integer Unix timestamp
- * @return string
- */
- if ( ! function_exists('standard_date'))
- {
- function standard_date($fmt = 'DATE_RFC822', $time = '')
- {
- $formats = array(
- 'DATE_ATOM' => '%Y-%m-%dT%H:%i:%s%Q',
- 'DATE_COOKIE' => '%l, %d-%M-%y %H:%i:%s UTC',
- 'DATE_ISO8601' => '%Y-%m-%dT%H:%i:%s%Q',
- 'DATE_RFC822' => '%D, %d %M %y %H:%i:%s %O',
- 'DATE_RFC850' => '%l, %d-%M-%y %H:%i:%s UTC',
- 'DATE_RFC1036' => '%D, %d %M %y %H:%i:%s %O',
- 'DATE_RFC1123' => '%D, %d %M %Y %H:%i:%s %O',
- 'DATE_RSS' => '%D, %d %M %Y %H:%i:%s %O',
- 'DATE_W3C' => '%Y-%m-%dT%H:%i:%s%Q'
- );
-
- if ( ! isset($formats[$fmt]))
- {
- return FALSE;
- }
-
- return mdate($formats[$fmt], $time);
- }
- }
-
- // ------------------------------------------------------------------------
-
- /**
- * Timespan
- *
- * Returns a span of seconds in this format:
- * 10 days 14 hours 36 minutes 47 seconds
- *
- * @access public
- * @param integer a number of seconds
- * @param integer Unix timestamp
- * @return integer
- */
- if ( ! function_exists('timespan'))
- {
- function timespan($seconds = 1, $time = '')
- {
- $CI =& get_instance();
- $CI->lang->load('date');
-
- if ( ! is_numeric($seconds))
- {
- $seconds = 1;
- }
-
- if ( ! is_numeric($time))
- {
- $time = time();
- }
-
- if ($time <= $seconds)
- {
- $seconds = 1;
- }
- else
- {
- $seconds = $time - $seconds;
- }
-
- $str = '';
- $years = floor($seconds / 31536000);
-
- if ($years > 0)
- {
- $str .= $years.' '.$CI->lang->line((($years > 1) ? 'date_years' : 'date_year')).', ';
- }
-
- $seconds -= $years * 31536000;
- $months = floor($seconds / 2628000);
-
- if ($years > 0 OR $months > 0)
- {
- if ($months > 0)
- {
- $str .= $months.' '.$CI->lang->line((($months > 1) ? 'date_months' : 'date_month')).', ';
- }
-
- $seconds -= $months * 2628000;
- }
-
- $weeks = floor($seconds / 604800);
-
- if ($years > 0 OR $months > 0 OR $weeks > 0)
- {
- if ($weeks > 0)
- {
- $str .= $weeks.' '.$CI->lang->line((($weeks > 1) ? 'date_weeks' : 'date_week')).', ';
- }
-
- $seconds -= $weeks * 604800;
- }
-
- $days = floor($seconds / 86400);
-
- if ($months > 0 OR $weeks > 0 OR $days > 0)
- {
- if ($days > 0)
- {
- $str .= $days.' '.$CI->lang->line((($days > 1) ? 'date_days' : 'date_day')).', ';
- }
-
- $seconds -= $days * 86400;
- }
-
- $hours = floor($seconds / 3600);
-
- if ($days > 0 OR $hours > 0)
- {
- if ($hours > 0)
- {
- $str .= $hours.' '.$CI->lang->line((($hours > 1) ? 'date_hours' : 'date_hour')).', ';
- }
-
- $seconds -= $hours * 3600;
- }
-
- $minutes = floor($seconds / 60);
-
- if ($days > 0 OR $hours > 0 OR $minutes > 0)
- {
- if ($minutes > 0)
- {
- $str .= $minutes.' '.$CI->lang->line((($minutes > 1) ? 'date_minutes' : 'date_minute')).', ';
- }
-
- $seconds -= $minutes * 60;
- }
-
- if ($str == '')
- {
- $str .= $seconds.' '.$CI->lang->line((($seconds > 1) ? 'date_seconds' : 'date_second')).', ';
- }
-
- return substr(trim($str), 0, -1);
- }
- }
-
- // ------------------------------------------------------------------------
-
- /**
- * Number of days in a month
- *
- * Takes a month/year as input and returns the number of days
- * for the given month/year. Takes leap years into consideration.
- *
- * @access public
- * @param integer a numeric month
- * @param integer a numeric year
- * @return integer
- */
- if ( ! function_exists('days_in_month'))
- {
- function days_in_month($month = 0, $year = '')
- {
- if ($month < 1 OR $month > 12)
- {
- return 0;
- }
-
- if ( ! is_numeric($year) OR strlen($year) != 4)
- {
- $year = date('Y');
- }
-
- if ($month == 2)
- {
- if ($year % 400 == 0 OR ($year % 4 == 0 AND $year % 100 != 0))
- {
- return 29;
- }
- }
-
- $days_in_month = array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
- return $days_in_month[$month - 1];
- }
- }
-
- // ------------------------------------------------------------------------
-
- /**
- * Converts a local Unix timestamp to GMT
- *
- * @access public
- * @param integer Unix timestamp
- * @return integer
- */
- if ( ! function_exists('local_to_gmt'))
- {
- function local_to_gmt($time = '')
- {
- if ($time == '')
- $time = time();
-
- return mktime( gmdate("H", $time), gmdate("i", $time), gmdate("s", $time), gmdate("m", $time), gmdate("d", $time), gmdate("Y", $time));
- }
- }
-
- // ------------------------------------------------------------------------
-
- /**
- * Converts GMT time to a localized value
- *
- * Takes a Unix timestamp (in GMT) as input, and returns
- * at the local value based on the timezone and DST setting
- * submitted
- *
- * @access public
- * @param integer Unix timestamp
- * @param string timezone
- * @param bool whether DST is active
- * @return integer
- */
- if ( ! function_exists('gmt_to_local'))
- {
- function gmt_to_local($time = '', $timezone = 'UTC', $dst = FALSE)
- {
- if ($time == '')
- {
- return now();
- }
-
- $time += timezones($timezone) * 3600;
-
- if ($dst == TRUE)
- {
- $time += 3600;
- }
-
- return $time;
- }
- }
-
- // ------------------------------------------------------------------------
-
- /**
- * Converts a MySQL Timestamp to Unix
- *
- * @access public
- * @param integer Unix timestamp
- * @return integer
- */
- if ( ! function_exists('mysql_to_unix'))
- {
- function mysql_to_unix($time = '')
- {
- // We'll remove certain characters for backward compatibility
- // since the formatting changed with MySQL 4.1
- // YYYY-MM-DD HH:MM:SS
-
- $time = str_replace('-', '', $time);
- $time = str_replace(':', '', $time);
- $time = str_replace(' ', '', $time);
-
- // YYYYMMDDHHMMSS
- return mktime(
- substr($time, 8, 2),
- substr($time, 10, 2),
- substr($time, 12, 2),
- substr($time, 4, 2),
- substr($time, 6, 2),
- substr($time, 0, 4)
- );
- }
- }
-
- // ------------------------------------------------------------------------
-
- /**
- * Unix to "Human"
- *
- * Formats Unix timestamp to the following prototype: 2006-08-21 11:35 PM
- *
- * @access public
- * @param integer Unix timestamp
- * @param bool whether to show seconds
- * @param string format: us or euro
- * @return string
- */
- if ( ! function_exists('unix_to_human'))
- {
- function unix_to_human($time = '', $seconds = FALSE, $fmt = 'us')
- {
- $r = date('Y', $time).'-'.date('m', $time).'-'.date('d', $time).' ';
-
- if ($fmt == 'us')
- {
- $r .= date('h', $time).':'.date('i', $time);
- }
- else
- {
- $r .= date('H', $time).':'.date('i', $time);
- }
-
- if ($seconds)
- {
- $r .= ':'.date('s', $time);
- }
-
- if ($fmt == 'us')
- {
- $r .= ' '.date('A', $time);
- }
-
- return $r;
- }
- }
-
- // ------------------------------------------------------------------------
-
- /**
- * Convert "human" date to GMT
- *
- * Reverses the above process
- *
- * @access public
- * @param string format: us or euro
- * @return integer
- */
- if ( ! function_exists('human_to_unix'))
- {
- function human_to_unix($datestr = '')
- {
- if ($datestr == '')
- {
- return FALSE;
- }
-
- $datestr = trim($datestr);
- $datestr = preg_replace("/\040+/", ' ', $datestr);
-
- if ( ! preg_match('/^[0-9]{2,4}\-[0-9]{1,2}\-[0-9]{1,2}\s[0-9]{1,2}:[0-9]{1,2}(?::[0-9]{1,2})?(?:\s[AP]M)?$/i', $datestr))
- {
- return FALSE;
- }
-
- $split = explode(' ', $datestr);
-
- $ex = explode("-", $split['0']);
-
- $year = (strlen($ex['0']) == 2) ? '20'.$ex['0'] : $ex['0'];
- $month = (strlen($ex['1']) == 1) ? '0'.$ex['1'] : $ex['1'];
- $day = (strlen($ex['2']) == 1) ? '0'.$ex['2'] : $ex['2'];
-
- $ex = explode(":", $split['1']);
-
- $hour = (strlen($ex['0']) == 1) ? '0'.$ex['0'] : $ex['0'];
- $min = (strlen($ex['1']) == 1) ? '0'.$ex['1'] : $ex['1'];
-
- if (isset($ex['2']) && preg_match('/[0-9]{1,2}/', $ex['2']))
- {
- $sec = (strlen($ex['2']) == 1) ? '0'.$ex['2'] : $ex['2'];
- }
- else
- {
- // Unless specified, seconds get set to zero.
- $sec = '00';
- }
-
- if (isset($split['2']))
- {
- $ampm = strtolower($split['2']);
-
- if (substr($ampm, 0, 1) == 'p' AND $hour < 12)
- $hour = $hour + 12;
-
- if (substr($ampm, 0, 1) == 'a' AND $hour == 12)
- $hour = '00';
-
- if (strlen($hour) == 1)
- $hour = '0'.$hour;
- }
-
- return mktime($hour, $min, $sec, $month, $day, $year);
- }
- }
-
- // ------------------------------------------------------------------------
-
- /**
- * Timezone Menu
- *
- * Generates a drop-down menu of timezones.
- *
- * @access public
- * @param string timezone
- * @param string classname
- * @param string menu name
- * @return string
- */
- if ( ! function_exists('timezone_menu'))
- {
- function timezone_menu($default = 'UTC', $class = "", $name = 'timezones')
- {
- $CI =& get_instance();
- $CI->lang->load('date');
-
- if ($default == 'GMT')
- $default = 'UTC';
-
- $menu = '<select name="'.$name.'"';
-
- if ($class != '')
- {
- $menu .= ' class="'.$class.'"';
- }
-
- $menu .= ">\n";
-
- foreach (timezones() as $key => $val)
- {
- $selected = ($default == $key) ? " selected='selected'" : '';
- $menu .= "<option value='{$key}'{$selected}>".$CI->lang->line($key)."</option>\n";
- }
-
- $menu .= "</select>";
-
- return $menu;
- }
- }
-
- // ------------------------------------------------------------------------
-
- /**
- * Timezones
- *
- * Returns an array of timezones. This is a helper function
- * for various other ones in this library
- *
- * @access public
- * @param string timezone
- * @return string
- */
- if ( ! function_exists('timezones'))
- {
- function timezones($tz = '')
- {
- // Note: Don't change the order of these even though
- // some items appear to be in the wrong order
-
- $zones = array(
- 'UM12' => -12,
- 'UM11' => -11,
- 'UM10' => -10,
- 'UM95' => -9.5,
- 'UM9' => -9,
- 'UM8' => -8,
- 'UM7' => -7,
- 'UM6' => -6,
- 'UM5' => -5,
- 'UM45' => -4.5,
- 'UM4' => -4,
- 'UM35' => -3.5,
- 'UM3' => -3,
- 'UM2' => -2,
- 'UM1' => -1,
- 'UTC' => 0,
- 'UP1' => +1,
- 'UP2' => +2,
- 'UP3' => +3,
- 'UP35' => +3.5,
- 'UP4' => +4,
- 'UP45' => +4.5,
- 'UP5' => +5,
- 'UP55' => +5.5,
- 'UP575' => +5.75,
- 'UP6' => +6,
- 'UP65' => +6.5,
- 'UP7' => +7,
- 'UP8' => +8,
- 'UP875' => +8.75,
- 'UP9' => +9,
- 'UP95' => +9.5,
- 'UP10' => +10,
- 'UP105' => +10.5,
- 'UP11' => +11,
- 'UP115' => +11.5,
- 'UP12' => +12,
- 'UP1275' => +12.75,
- 'UP13' => +13,
- 'UP14' => +14
- );
-
- if ($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 */