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 $system_time;
}
return time();
}
}
// ------------------------------------------------------------------------
/**
* Convert MySQL Style Datecodes
*
* This function is identical to PHPs date() function,
* except that it allows date codes to be formatted using
* the MySQL style, where each code letter is preceded
* with a percent sign: %Y %m %d etc...
*
* The benefit of doing dates this way is that you don't
* have to worry about escaping your text letters that
* match the date codes.
*
* @access public
* @param string
* @param integer
* @return integer
*/
if ( ! function_exists('mdate'))
{
function mdate($datestr = '', $time = '')
{
if ($datestr == '')
{
return '';
}
$time = ($time == '') ? now() : $time;
$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 = '')
{
$formats = array(
'DATE_ATOM' => '%Y-%m-%dT%H:%i:%s%O',
'DATE_COOKIE' => '%l, %d-%M-%y %H:%i:%s UTC',
'DATE_ISO8601' => '%Y-%m-%dT%H:%i:%s%O',
'DATE_RFC822' => '%D, %d %M %y %H:%i:%s %O',
'DATE_RFC850' => '%l, %d-%M-%y %H:%i:%s UTC',
'DATE_RFC1036' => '%D, %d %M %y %H:%i:%s %O',
'DATE_RFC1123' => '%D, %d %M %Y %H:%i:%s %O',
'DATE_RFC2822' => '%D, %d %M %Y %H:%i:%s %O',
'DATE_RSS' => '%D, %d %M %Y %H:%i:%s %O',
'DATE_W3C' => '%Y-%m-%dT%H:%i:%s%O'
);
if ( ! isset($formats[$fmt]))
{
return FALSE;
}
return mdate($formats[$fmt], $time);
}
}
// ------------------------------------------------------------------------
/**
* Timespan
*
* Returns a span of seconds in this format:
* 10 days 14 hours 36 minutes 47 seconds
*
* @access public
* @param integer a number of seconds
* @param integer Unix timestamp
* @param integer a number of display units
* @return string
*/
if ( ! function_exists('timespan'))
{
function timespan($seconds = 1, $time = '', $units = 7)
{
$CI =& get_instance();
$CI->lang->load('date');
if ( ! is_numeric($seconds))
{
$seconds = 1;
}
if ( ! is_numeric($time))
{
$time = time();
}
if ( ! is_numeric($units))
{
$units = 7;
}
$seconds = ($time <= $seconds) ? 1 : $time - $seconds;
$str = array();
$years = floor($seconds / 31557600);
if ($years > 0)
{
$str[] = $years.' '.$CI->lang->line((($years > 1) ? 'date_years' : 'date_year'));
}
$seconds -= $years * 31557600;
$months = floor($seconds / 2629743);
if (count($str) < $units && ($years > 0 OR $months > 0))
{
if ($months > 0)
{
$str[] = $months.' '.$CI->lang->line((($months > 1) ? 'date_months' : 'date_month'));
}
$seconds -= $months * 2629743;
}
$weeks = floor($seconds / 604800);
if (count($str) < $units && ($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 (count($str) < $units && ($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 (count($str) < $units && ($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 (count($str) < $units && ($days > 0 OR $hours > 0 OR $minutes > 0))
{
if ($minutes > 0)
{
$str[] = $minutes.' '.$CI->lang->line((($minutes > 1) ? 'date_minutes' : 'date_minute'));
}
$seconds -= $minutes * 60;
}
if (count($str) === 0)
{
$str[] = $seconds.' '.$CI->lang->line((($seconds > 1) ? 'date_seconds' : 'date_second'));
}
return implode(', ', $str);
}
}
// ------------------------------------------------------------------------
/**
* Number of days in a month
*
* Takes a month/year as input and returns the number of days
* for the given month/year. Takes leap years into consideration.
*
* @access public
* @param integer a numeric month
* @param integer a numeric year
* @return integer
*/
if ( ! function_exists('days_in_month'))
{
function days_in_month($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, $year);
}
}
// ------------------------------------------------------------------------
/**
* Turns many "reasonably-date-like" strings into something
* that is actually useful. This only works for dates after unix epoch.
*
* @access public
* @param string The terribly formatted date-like string
* @param string Date format to return (same as php date function)
* @return string
*/
if ( ! function_exists('nice_date'))
{
function nice_date($bad_date = '', $format = FALSE)
{
if (empty($bad_date))
{
return 'Unknown';
}
// Date like: YYYYMM
if (preg_match('/^\d{6}$/', $bad_date))
{
if (in_array(substr($bad_date, 0, 2),array('19', '20')))
{
$year = substr($bad_date, 0, 4);
$month = substr($bad_date, 4, 2);
}
else
{
$month = substr($bad_date, 0, 2);
$year = substr($bad_date, 2, 4);
}
return date($format, strtotime($year . '-' . $month . '-01'));
}
// Date Like: YYYYMMDD
if (preg_match('/^\d{8}$/',$bad_date))
{
$month = substr($bad_date, 0, 2);
$day = substr($bad_date, 2, 2);
$year = substr($bad_date, 4, 4);
return date($format, strtotime($month . '/01/' . $year));
}
// Date Like: MM-DD-YYYY __or__ M-D-YYYY (or anything in between)
if (preg_match('/^\d{1,2}-\d{1,2}-\d{4}$/',$bad_date))
{
list($m, $d, $y) = explode('-', $bad_date);
return date($format, strtotime("{$y}-{$m}-{$d}"));
}
// Any other kind of string, when converted into UNIX time,
// produces "0 seconds after epoc..." is probably bad...
// return "Invalid Date".
if (date('U', strtotime($bad_date)) == '0')
{
return "Invalid Date";
}
// It's probably a valid-ish date format already
return date($format, strtotime($bad_date));
}
}
// ------------------------------------------------------------------------
/**
* 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');
$default = ($default == 'GMT') ? 'UTC' : $default;
$menu = '";
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;
}
$tz = ($tz == 'GMT') ? 'UTC' : $tz;
return ( ! isset($zones[$tz])) ? 0 : $zones[$tz];
}
}
// ------------------------------------------------------------------------
/**
* Date range
*
* Returns a list of dates within a specified period.
*
* @param int unix_start UNIX timestamp of period start date
* @param int unix_end|days UNIX timestamp of period end date
* or interval in days.
* @param mixed is_unix Specifies wether the second @param
* is a UNIX timestamp or day interval
* - TRUE or 'unix' for a timestamp
* - FALSE or 'days' for an interval
* @param string date_format Output date format, same as in date()
* @return array
*/
if ( ! function_exists('date_range'))
{
function date_range($unix_start = '', $mixed = '', $is_unix = TRUE, $format = 'Y-m-d')
{
if ($unix_start == '' OR $mixed == '' OR $format == '')
{
return FALSE;
}
$is_unix = ! ( ! $is_unix OR $is_unix === 'days');
// Validate input and try strtotime() on invalid timestamps/intervals, just in case
if ( ( ! preg_match('/^[0-9]+$/', $unix_start) && ($unix_start = @strtotime($unix_time)) === FALSE)
OR ( ! preg_match('/^[0-9]+$/', $mixed) && ($is_unix === FALSE OR ($mixed = @strtotime($mixed)) === FALSE))
OR ($is_unix === TRUE && $mixed < $unix_start))
{
return FALSE;
}
if ($is_unix && ($unix_start == $mixed OR date($format, $unix_start) === date($format, $mixed)))
{
return array($start_date);
}
$range = array();
/* NOTE: Even though the DateTime object has many useful features, it appears that
* it doesn't always handle properly timezones, when timestamps are passed
* directly to its constructor. Neither of the following gave proper results:
*
* new DateTime('')
* new DateTime('', '')
*
* --- available in PHP 5.3:
*
* DateTime::createFromFormat('', '')
* DateTime::createFromFormat('', '', 'setTimestamp($unix_start);
if ($is_unix)
{
$arg = new DateTime();
$arg->setTimestamp($mixed);
}
else
{
$arg = (int) $mixed;
}
$period = new DatePeriod($from, new DateInterval('P1D'), $arg);
foreach ($period as $date)
{
$range[] = $date->format($format);
}
/* If a period end date was passed to the DatePeriod constructor, it might not
* be in our results. Not sure if this is a bug or it's just possible because
* the end date might actually be less than 24 hours away from the previously
* generated DateTime object, but either way - we have to append it manually.
*/
if ( ! is_int($arg) && $range[count($range) - 1] !== $arg->format($format))
{
$range[] = $arg->format($format);
}
return $range;
}
$from->setDate(date('Y', $unix_start), date('n', $unix_start), date('j', $unix_start));
$from->setTime(date('G', $unix_start), date('i', $unix_start), date('s', $unix_start));
if ($is_unix)
{
$arg = new DateTime();
$arg->setDate(date('Y', $mixed), date('n', $mixed), date('j', $mixed));
$arg->setTime(date('G', $mixed), date('i', $mixed), date('s', $mixed));
}
else
{
$arg = (int) $mixed;
}
$range[] = $from->format($format);
if (is_int($arg)) // Day intervals
{
do
{
$from->modify('+1 day');
$range[] = $from->format($format);
}
while (--$arg > 0);
}
else // end date UNIX timestamp
{
for ($from->modify('+1 day'), $end_check = $arg->format('Ymd'); $from->format('Ymd') < $end_check; $from->modify('+1 day'))
{
$range[] = $from->format($format);
}
// Our loop only appended dates prior to our end date
$range[] = $arg->format($format);
}
return $range;
}
}
/* End of file date_helper.php */
/* Location: ./system/helpers/date_helper.php */