[eluser]Philo01[/eluser]
I'm currently working on a project where all time is stored in GMT.
I allow users to schedule an event using their local time.
I noticed that if you are using the human to unix function it will actually convert the given time and date to GMT. This is not very handy for example:
You schedule an event at (local UP1 + Daylight saving) 09/07/11 10:00:00 PM it will save this as 1310248800.
But if you to convert this back to the users local time using the gmt_to_local function you will notice that the time has shifted 2 hours 10/07/11 00:00:00 AM.
It's easy to solve luckily, create a new file inside
application/helpers/MY_date_helper.php
Code:
/**
* Convert "human" (local) date to GMT
*
* Reverses the above process
*
* @access public
* @param string, timezone, daylight saving
* @return integer
*/
function human_to_unix($datestr = '', $timezone = '', $dst = FALSE)
{
if ($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;
}
$unix = mktime($hour, $min, $sec, $month, $day, $year);
if($timezone != '')
{
$unix -= timezones($timezone) * 3600;
if ($dst == TRUE)
{
$unix -= 3600;
}
}
return $unix;
}
This will store the time correctly using GMT
Would be great is this could be integrated into CI by default.
