<?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_minute')).', '; } $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 $month > 12) { return 0; } if ( ! is_numeric($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 */ 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]; } ?>