I've been doing a good amount of research with this, and used a few codes to get to know how to make this work, but nothing has worked the way I wanted it to, or hasn't worked at all.
The code is:
<?php
$time1 = $user['last_active'];
$time2 = "+5 minutes";
if (strtotime($time1) > strtotime($time2)) {
echo "Online!";
}else{
echo "Offline!";
}
?>
It is supposed to compare the two variables, and find out if the last active variable is greater or less than 5 minutes, and if it is greater, appear offline. I do not know what's wrong as the NOW() updates on each page and stops if the user is not logged in. Any suggestions or help? Thanks.
The $time1 variable is coming from a fetched array that gets the ['last_active'] information that updates on each page.
I fixed my code, but it still doesn't work right, however, I think I have managed to get further than I was..
<?php
$first = new DateTime();
$second = new DateTime($user['last_active']);
$diff = $first->diff( $second );
$diff->format( '%H:%I:%S' );
if($diff->format( '%H:%I:%S' ) > (strtotime("5 minutes"))){
echo "Offline";
}else{
echo "Online";
}
?>
What can I do at this point?
Nobody pointed out that you actually have a bug. The "current time" will never be greater than "the current time +5 minutes"
Your first code sample will work right if you instead use "-5 minutes" as the "online threshold."
Also, comparing a timestamp without date to the output of strtotime() as you do in the second code is not a proper comparison. It has two problems:
Each time a new day comes around, the same time value will be repeated.
The output of strtotime is an integer representing seconds-since-epoch; the output of format() is a textual representation of hours:minutes:seconds within the current date.
As for your question how to calculate time between 2 dates / time, please view the solution on the following posts, that should give you enough information! (duplicate ? )
Calculate elapsed time in php
And here
How to get time difference in minutes in PHP
EDIT AS YOU PLEASE
<?
$first = new DateTime(); // this would hold your [last active]
//$first->modify("-6 minutes");
$second = new DateTime("NOW");
$difference = $second->diff( $first ); // second diff first
if ($difference->format('%i') > 5) { // comparing minutes only in example ( %i )
echo "The user is AFK";
} else {
echo "user might still be active";
}
?>
Related
In the application that I'm working on, the user must choose a date/time which is at least 5 minutes into the future. For this, I'm trying to implement a check. Below is the code which checks the time difference between the current time and chosen time.
$cur_date = new DateTime();
$cur_date = $cur_date->modify("+1 hours"); //fix the time since its an hour behind
$cur_date = $cur_date->format('m/d/Y g:i A');
$to_time = strtotime($chosen_date);
$from_time = strtotime($cur_date);
echo round(abs($from_time - $to_time) / 60,2). " minute"; //check the time difference
This tells me the time difference from the chosen time and the current time in minutes. So let's say the current time is 09/22/2015 5:53 PM and the chosen time is 09/22/2015 5:41 PM - it will tell me the difference which is 12 minutes.
What I want to know is how I can tell if those 12 minutes are into the future or in the past. I want my application to only proceed if the chosen time is at least 5 minutes into the future.
You're doing too much work. Just use DateTime() to do the date math for you:
// Wrong way to do this. Work with timezones instead
$cur_date = (new DateTime()->modify("+1 hours"));
// Assuming acceptable format for $chosen_date
$to_time = new DateTime($chosen_date);
$diff = $cur_date->diff($to_time);
if ($diff->format('%R') === '-') {
// in the past
}
echo $diff->format('%i') . ' minutes';
Demo
$enteredDate = new DateTime($chosen_date)->getTimestamp();
$now = new DateTime()->getTimestamp();
if(($enteredDate-$now)/60 >=5)echo 'ok';
Basically, the code takes the two dates converted in seconds since 1/1/1970. We calculate the difference between the two dates and divide the result by 60 as we want minutes. If there is a difference of at least 5 minutes, we're ok. If the number is negative, then we are in the past.
If anyone is looking to do something similar, I found the Carbon library which is included by default with the framework I am using (Laravel 5), it was much easier to do this calculation.
$chosen_date = new Carbon($chosen_date, 'Europe/London');
$whitelist_date = Carbon::now('Europe/London');
$whitelist_date->addMinutes(10);
echo "Chosen date must be after this date: ".$whitelist_date ."</br>";
echo "Chosen Date: ".$chosen_date ."</br>";
if ($chosen_date->gt($whitelist_date)) {
echo "proceed";
} else {
echo "dont proceed";
}
One thing that has always confused me is Time in coding. I am very confused on how to go about doing this! Simply, I have a MySql Timestamp, and I want to subtract that from 24 hours.
Basically, I am trying to code something that only lets you complete an action once every 24 hours, and then if they try to complete it more then once it will tell them how long they have to wait to do it again.
This is the code I currently have:
$dailylogincheck = 2015-08-16 13:30:32 //MySQL Timestamp
date_default_timezone_set("America/New_York");
$lastloginbonus = new DateTime($dailylogincheck);
$currenttime = $lastloginbonus->diff(new DateTime(date("Y-m-d H:i:s")));
I don't have to use this code (if there is a better way to do this). So I would just like to subtract the current Timestamp from 24 hours, but I have no clue how to do this in PHP :( Please Help!
P.S. I would simply like to display a sentence like the following: You have already done this within the past 24 hours. Please come back in X hours X minutes and try again.
hope this works :-)
<?php
$dailylogincheck = '2015-08-16 13:30:32';
$end = new DateTime($dailylogincheck);
$end->add(new DateInterval('P1D'));//add 1 day to find end date
$now = new DateTime('now');
$interval = $end->diff($now);
if($end->diff($now)->days >= 1){
echo 'go for it';
}else{
echo $interval->format('%H hours, %i minutes until you can XXX');
}
As Dagon said, doing it in mysql is the best approach... but to address your php question, DateTime will accept a number of simple modifiers:
<?php
$lastBonus = new DateTime("-1 day"); // Last bonus was exactly 24 hours ago
$canNotGetNewBonus = new DateTime("-1 hour"); // Attempting another bonus 23 hours later
$canGetNewBonus = new DateTime("+1 hour"); // Attempting another bonus 25 hours later
var_dump($lastBonus->diff($canNotGetNewBonus)->days >= 1);
var_dump($lastBonus->diff($canGetNewBonus)->days >= 1);
Context
I would like to use PHP to change out content in HTML every other day. I can currently achieve this, however, I would need the content to change at 7:00 AM PST. Right now, I'm essentially subtracting the current time from a set point in time using mktime and rounding down. A simple if statement takes care of the variable.
The Code
<?php
$first_date = mktime(7,0,0,1,1,2014);
$second_date = time();
$offset = $second_date-$first_date;
$this_day = floor($offset/60/60/24);
if ($this_day % 2 == 0) {
//do something
} else {
//do something else
}
?>
Like I stated before, the code is working however it is not changing at 7:00 AM PST. I tried adjusting the start time in $first_date however it didn't seem to help. I think I am missing something regarding actual timezones and how the time is being calculated. Any insight would be greatly appreciated.
I just take the start date and gave it a timezone, then checked the day number of the year. If it's even and 7am or later, do something. Otherwise, do something else. The only issue you will have is New Years. This may show the same content two days in a row.
<?php
$date = new DateTime(null, new DateTimeZone('America/Los_Angeles'));
if ($date->format('z') % 2 == 0 && $date->format('h') >= 7) {
//do something
} else {
//do something else
}
?>
I've been trying at this for a bit and can't get the damn code to work.. This is my first post, I've gone through a few, tried a million different ways.. I just want to get the difference in hours, then I'm set, I'll get the rest figured out..
Right now, it's giving me unusual answers (say there's a 2 hour difference, it'll give me 14 as an answer) Pardon my coding, I haven't done this in years and have no real formal training. I'll be as thorough as possible in my comments, and thanks a LOT. Any links appreciated. I have tried a LOT. Using PHP 5.3.something, and am pulling off a Wordpress 3.7.1 database.
Thanks in advance for the help for a beginner. I want to display "Updated x hours ago". Once I have the darned thing displaying the correct result, I'll figure the rest out.
//This is the current date, putting it into strtotime so everything is in the same format. It displays accurately.
$currentDate = date("Y-m-d");
$currentTime = date("H:i:s");
$currentDateHour = date("H", strtotime($currentDate . $currentTime));
// This is the date I'm pulling from the database, it only displays
// when in strtotime for some reason. It displays accurately to what is in the mySQL DB
$upDate = date("Y-m-d H", strtotime($row2[post_date]));
// Some variables to make life easier for later if statements if I ever get that far. Displays accurately.
$upDatehour = date("H", strtotime($row2[post_date]));
// trying simple subtraction
$hour = $currentDateHour - upDatehour;
// this is where the result is incorrect, what is wrong here? Any method I've tried gives me the same result, with or without strotime.. it's gotta be something simple, always is!
print strtotime($hour);
You can drastically simplify your code. I'd recommend refactoring it to use DateTime and specifically DateTime::diff().
$now = new DateTime();
$post = new DateTime($row2['post_date']);
$interval = $now->diff($post);
echo "Updated " . $interval->h . " hours ago";
Working example: http://3v4l.org/23AL6
Note that this will only show up to 24 hours difference. If you want to show all hours even for a difference of more than 24 hours, you'll need to figure in the days. Something like this:
$hours = $interval->h + ($interval->format("%a") * 24);
echo "Updated $hours hours ago";
Working example: http://3v4l.org/ilItU
If you are just trying to get the number of hours between two arbitrary times, the easiest way would be to get the difference in seconds of the two times, and then divide by 3600 to determine the number of hours between the two dates.
Here is a basic example:
<?php
$row2['post_date'] = '2013-12-02 07:45:38'; // date from database
$now = time(); // get current timestamp in seconds
$upDate = strtotime($row2['post_date']); // convert date string to timestamp
$diff = $now - $upDate; // subtract difference between the two times
$hours = floor($diff / 3600); // get the number of hours passed between the 2 times
echo $hours; // display result
Also, Wordpress has a built in function that may end up doing what your ultimate goal is, see wordpress function human_time_diff().
Example:
<?php echo human_time_diff( get_the_time('U'), current_time('timestamp') ) . ' ago';
Result:
2 days ago.
Example how to get difference between dates in hours:
$diff = date_diff(date_create(), date_create($row2['post_date']));
$hours = $diff->days * 24 + $diff->h;
If you wish to format output number with leading zeros, you can use sprintf() or str_pad() function. Example of sprintf() use for HH:mm format:
echo sprintf('%02d:%02d', $hours, $diff->i);
demo
i got one problem where i nead your help, if you have any solution please help me.
The problem is as follows:
I m using $currenttime and $settime variable to set currenttime and targettime
$currenttime = date('Y-m-d H:i:s');
$settime = "2012-o5-03 02:10:00";
$diff1 = abs(strtotime($currenttime) - strtotime($settime));
On the basis of $diff1 we are starting the countdown and countdown are working properly.
Now i want to show a message when $settime and $currenttime are equal for these i have use this code
if(strtotime($currenttime) == strtotime($settime))
{
echo "Your time begin just now";
}
but after countdown reached to zero it should show the message but it not showing, if any one have any solution plz help me.
i have seen your code there was a little mistake with declaration such o instead of 0
& the code i wrote which is working as follow....
echo $currenttime = date('Y-m-d H:i:s');
echo $settime = "2012-05-03 12:20:50";
$diff1 = abs(strtotime($currenttime) - strtotime($settime));
if($currenttime != $settime)
{
echo "Your time not yet set";
}
else
{
echo "Your time begin just now";
}
I would tend to compare for a time later than the expected trigger time in case the script is not running at the exact second that current and trigger time are equal.
if(strtotime($currenttime) >= strtotime($settime))
{
echo "Your time begin just now";
}
Don't use equal, if your script-call is a bit late, you'll never get there. use either greater then > to do it for all times that are PAST your goal, or check if the difference between the times is something small (like abs(time1 - time2) < 2), so you know your current time is closer then 2 seconds from your target time.