php Date()

[driveflexfuel]

I am trying to compare the difference between two times.

$time1 = 2009-04-27 09:18:10;
$time2 = 2009-04-27 11:18:10;

I am using this code to restrict use to one time per hour. If anyone can help out i would highly appreciated.

 

[garrettroyce]

unix style time stamps (using time() ) would be easier. It returns the number of seconds since the unix epoch (1/1/1970 I believe). There's 3600 seconds in an hour, so you can take time1 - time2 and if it's greater than 3600 more than 1 hour has passed.

 

[freecrm]

Here's one answer.. expanding on garrettroyce's answer.

Start Sessions at the top of the pages.

session_start()

On first time use.

$_SESSION['firstusetime']=Time();
$_SESSION['nexttrytime']= $_SESSION['firstusetime'] + 3600;

On next attempt

if ((Time() - $_SESSION['firstusetime']) <3600) {

echo "<br/>Sorry, you have already used this funtion within the last hour.  Please try again after ".date("Y-m-d H:i:s", $_SESSION['nexttrytime']);

} else {

//execute code

}

There are a number of ways to get round this, but this is pretty simple.

 

[driveflexfuel]

I think i need to supply some ore information on what I am doing.

time1 comes from a database entry such as $con['time'] the format is:
$time1 = 2009-04-27 09:18:10;

I do not want to use session variables. I am looking to do it in normal php variables.
Edit:
This is what my solution was:

$characters = array(" ", "-", ":");

$time1 = $con['time'];
$time1 = str_replace($characters, ",", "$time1");
list($year, $month, $day, $hour, $minute, $second) = split(',', $time1);
$time1 = mktime($hour,$minute,$second,$month,$day,$year);

I did this with both times and then subtracted the two to get the number of seconds.

 

[garrettroyce]

Yeah, your method sounds pretty good. I almost always use unix timestamps for everything, so that they can more easily be converted and modified with regular arithmetic

 

[misson]

Alternative timestamp conversions:
strtotime will parse a string into a Unix timestamp; it's less efficient than other approaches (such as yours), but not overly so and is very succinct. strptime and date_parse_from_format will efficiently parse a date/time string to an array. You can even use sscanf for a one-liner:

$time1=call_user_func_array('mktime', sscanf('2009-04-27 09:18:10', '%6$d-%4$d-%5$d %1$d:%2$d:%3$d'));

Eventually you'll be able to use DateTime and DateInterval for date/time arithmetic.

 

[kapisco]

$time1 = '2009-04-27 09:18:10';
$time2 = '2009-04-27 11:18:10';


$time_diff = strtotime($time2) - strtotime($time1);//in seconds
echo ($time_diff / 3600);//in hours

here's the solution dude enjoy