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+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * Code Igniter
+ *
+ * An open source application development framework for PHP 4.3.2 or newer
+ *
+ * @package CodeIgniter
+ * @author Rick Ellis
+ * @copyright Copyright (c) 2006, pMachine, Inc.
+ * @license http://www.codeignitor.com/user_guide/license.html
+ * @link http://www.codeigniter.com
+ * @since Version 1.0
+ * @filesource
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+ * Code Igniter Date Helpers
+ *
+ * @package CodeIgniter
+ * @subpackage Helpers
+ * @category Helpers
+ * @author Rick Ellis
+ * @link http://www.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
+ */
+function now()
+{
+ $obj =& get_instance();
+
+ if (strtolower($obj->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 $system_time;
+ }
+ else
+ {
+ return time();
+ }
+}
+
+// ------------------------------------------------------------------------
+
+/**
+ * Convert MySQL Style Datecodes
+ *
+ * This function is identical to PHPs date() function,
+ * except that it allows date codes to be formatted using
+ * the MySQL style, where each code letter is preceded
+ * with a percent sign: %Y %m %d etc...
+ *
+ * The benefit of doing dates this way is that you don't
+ * have to worry about escaping your text letters that
+ * match the date codes.
+ *
+ * @access public
+ * @param string
+ * @param integer
+ * @return integer
+ */
+function mdate($datestr = '', $time = '')
+{
+ if ($datestr == '')
+ return '';
+
+ if ($time == '')
+ $time = now();
+
+ $datestr = str_replace('%\\', '', preg_replace("/([a-z]+?){1}/i", "\\\\\\1", $datestr));
+ return date($datestr, $time);
+}
+
+// ------------------------------------------------------------------------
+
+/**
+ * Convert MySQL Style Datecodes
+ *
+ * Returns a span of seconds in this format:
+ * 10 days 14 hours 36 minutes 47 seconds
+ *
+ * @access public
+ * @param integer a number of seconds
+ * @param integer Unix timestamp
+ * @return integer
+ */
+function timespan($seconds = 1, $time = '')
+{
+ $obj =& get_instance();
+ $obj->lang->load('date');
+
+ if ( ! is_numeric($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 .= $years.' '.$obj->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 .= $months.' '.$obj->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 .= $weeks.' '.$obj->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 .= $days.' '.$obj->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 .= $hours.' '.$obj->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 .= $minutes.' '.$obj->lang->line((($minutes > 1) ? 'date_minutes' : 'date_minutes')).', ';
+ }
+
+ $seconds -= $minutes * 60;
+ }
+
+ if ($str == '')
+ {
+ $str .= $seconds.' '.$obj->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
+ */
+function days_in_month($month = 0, $year = '')
+{
+ if ($month < 1 OR $month > 12)
+ {
+ return 0;
+ }
+
+ if ( ! ctype_digit($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
+ */
+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", $time));
+}
+
+// ------------------------------------------------------------------------
+
+/**
+ * Converts GMT time to a localized value
+ *
+ * Takes a Unix timestamp (in GMT) as input, and returns
+ * at the local value based on the timezone and DST setting
+ * submitted
+ *
+ * @access public
+ * @param integer Unix timestamp
+ * @param string timezone
+ * @param bool whether DST is active
+ * @return integer
+ */
+function gmt_to_local($time = '', $timezone = 'UTC', $dst = FALSE)
+{
+ if ($time == '')
+ {
+ return now();
+ }
+
+ $time += timezones($timezone) * 3600;
+
+ if ($dst == TRUE)
+ {
+ $time += 3600;
+ }
+
+ return $time;
+}
+
+// ------------------------------------------------------------------------
+
+/**
+ * Converts a MySQL Timestamp to Unix
+ *
+ * @access public
+ * @param integer Unix timestamp
+ * @return integer
+ */
+function mysql_to_unix($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($time, 0, 4)
+ );
+}
+
+// ------------------------------------------------------------------------
+
+/**
+ * Unix to "Human"
+ *
+ * Formats Unix timestamp to the following prototype: 2006-08-21 11:35 PM
+ *
+ * @access public
+ * @param integer Unix timestamp
+ * @param bool whether to show seconds
+ * @param string format: us or euro
+ * @return string
+ */
+function unix_to_human($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 $r;
+}
+
+// ------------------------------------------------------------------------
+
+/**
+ * Convert "human" date to GMT
+ *
+ * Reverses the above process
+ *
+ * @access public
+ * @param string format: us or euro
+ * @return integer
+ */
+function human_to_unix($datestr = '')
+{
+ if ($datestr == '')
+ {
+ return FALSE;
+ }
+
+ $datestr = trim($datestr);
+ $datestr = preg_replace("/\040+/", "\040", $datestr);
+
+ if ( ! ereg("^[0-9]{2,4}\-[0-9]{1,2}\-[0-9]{1,2}\040[0-9]{1,2}:[0-9]{1,2}.*$", $datestr))
+ {
+ return FALSE;
+ }
+
+ $split = preg_split("/\040/", $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']) AND ereg("[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, $year);
+}
+
+// ------------------------------------------------------------------------
+
+/**
+ * Timezone Menu
+ *
+ * Generates a drop-down menu of timezones.
+ *
+ * @access public
+ * @param string timezone
+ * @param string classname
+ * @param string menu name
+ * @return string
+ */
+function timezone_menu($default = 'UTC', $class = "", $name = 'timezones')
+{
+ $obj =& get_instance();
+ $obj->lang->load('date');
+
+ if ($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}'{$selected}>".$obj->lang->line($key)."</option>\n";
+ }
+
+ $menu .= "</select>";
+
+ return $menu;
+}
+
+// ------------------------------------------------------------------------
+
+/**
+ * Timezones
+ *
+ * Returns an array of timezones. This is a helper function
+ * for varios other ones in this library
+ *
+ * @access public
+ * @param string timezone
+ * @return string
+ */
+function timezones($tz = '')
+{
+ // Note: Don't change the order of these even though
+ // some items appear to be in the wrong order
+
+ $zones = array(
+ 'UM12' => -12,
+ 'UM11' => -11,
+ 'UM10' => -10,
+ 'UM9' => -9,
+ 'UM8' => -8,
+ 'UM7' => -7,
+ 'UM6' => -6,
+ 'UM5' => -5,
+ 'UM4' => -4,
+ 'UM25' => -2.5,
+ 'UM3' => -3,
+ 'UM2' => -2,
+ 'UM1' => -1,
+ 'UTC' => 0,
+ 'UP1' => +1,
+ 'UP2' => +2,
+ 'UP3' => +3,
+ 'UP25' => +2.5,
+ 'UP4' => +4,
+ 'UP35' => +3.5,
+ 'UP5' => +5,
+ 'UP45' => +4.5,
+ 'UP6' => +6,
+ 'UP7' => +7,
+ 'UP8' => +8,
+ 'UP9' => +9,
+ 'UP85' => +8.5,
+ 'UP10' => +10,
+ 'UP11' => +11,
+ 'UP12' => +12
+ );
+
+ if ($tz == '')
+ {
+ return $zones;
+ }
+
+ if ($tz == 'GMT')
+ $tz = 'UTC';
+
+ return ( ! isset($zones[$tz])) ? 0 : $zones[$tz];
+}
+
+
+?> \ No newline at end of file
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