How would i turn
2012-04-11 12:49:14
into a unixtime stamp?
I have tried
$time = mktime("2012-04-11 12:59:14");
and
$time = strtotime("2012-04-11 12:59:14");
EDIT
Basically on update my database adds a date/time that looks like this.
2012-04-11 12:49:14
I need it to be turned into a unix timestamp so i can use a "time ago" function i found.
My tests have revealed,
Database input -> 2012-04-11 13:22:05 which is converted into -> 1334143355 -> But the current time from(time()) is ->1334146956
I dont see why they do not match up?
The statement $time = strtotime("2012-04-11 12:59:14"); is working just fine.
Do a
echo $time;
after your declaration.
It sounds like an issue with mismatched time offsets (daylight saving perhaps). It is always best to do it all in PHP or all in MySQL to avoid mismatched time offsets.
1334146484 - 1334142872 = 3612s = 1h 12s
You should use UNIX_TIMESTAMP either when inserting or retrieving the data depending on whether you prefer storing as unix timestamp or datetime -
INSERT INTO `table` (date_field) VALUES (UNIX_TIMESTAMP('2012-04-11 12:59:14'));
SELECT UNIX_TIMESTAMP(date_field) FROM `table`;
I expect that the difference is from being in a different timezone. The difference is more or less +1 hour form the expected result. You need to be more specific about what time you want - as in are you recording/retrieving time from your timezone, or from UTC.
$time = strtotime("2012-04-11 12:59:14"); is correct option.
Related
Let's suppose we have this date 1972-12-31 23:59:59, if we get the TimeStamp for it from DateTimeImmutable object we will get this:
$formattedDate = '1972-12-31 23:59:59';
$ts = (new DateTimeImmutable($formatedDate))->getTimestamp(); // <- 94690799
The problem that if you try to revers the conversion, so it becomes from timestamp into formatted date:
$ts = 94690799;
$formattedDate =
(new DateTimeImmutable(sprintf('#%s', $ts)))->format('Y-m-d H:i:s'); // <- 1972-12-31 22:59:59
There is an hour gone in the second way.
So the million dolor question would be, which one of those timing is corresponding to the correct time?
Is this a bug? Or am I messing something in here?
When you create a DateTime object from a formatted string, it is created in your server's default timezone (see date_default_timezone_get). But Unix timestamps don't have a timezone - they're always in UTC. So if you write:
(new DateTimeImmutable('1972-12-31 23:59:59'))->getTimestamp();
then what you're really asking PHP is "How many seconds after 1970 in UTC was it, when it was that date + time in my current timezone". In your case, the server looks like it is running one hour ahead of UTC, hence the difference.
Crucially, when you do the inverse and create a DateTime object from a timestamp, the object's timezone is always set to UTC. There's a brief note about it on this manual page.
If you set the default timezone to UTC before running the code, you'll see that the output matches. I've added an example here: https://3v4l.org/2Rfp3
I've been struggling to get an exact answer for this question. There are many that are close to what I'm wanting but seem to still be just off. The application of this is to ensure that a booking can't be made for a past date.
I have a form which has an input for time & another for date. Firstly, I wan't to take both of these inputs & convert them to a timestamp.
This code returns nothing
$time_date = sprintf("%s %s", $pDate, $pTime);
$objDate = DateTime::createFromFormat('H:ia d/m/Y', $time_date);
$stamp = $objDate->getTimestamp();
echo $stamp;
So I've have tried using something like this
$pDate = $_POST['pDate'];
$pTime = $_POST['pTime'];
$full_date = $pDate . ' ' . $pTime;
$timestamp = strtotime($full_date);
echo $timestamp;
But for some reason it is returning an incorrect timestamp. (i've been using an online converter) 02/06/2014 as date & 12:23am as time, is not 1401625380. This according to the converter is Sun, 01 Jun 2014 12:23:00 GMT.
Does someone have working code for returning a timestamp of both time & date inputs?
Secondly I want to compare this timestamp with a specified one & check to see if it is greater than. I've created a timestamp for my timezone with this
$date = new DateTime(null, new DateTimeZone('Pacific/Auckland'));
$cDate = $date->getTimestamp();
echo $cDate;
and will simply have an if statement which compares the two and echos the appropriate message.
I feel as though there are multiple question on here that are ALMOST what I'm wanting to achieve but I can't manage to get them working. Apologies for the near duplicate.
Note: I'm using ajax to post form data (if this could possibly interfere).
Your second code snipped is correct. Assuming it's in datetime format (Y-m-d H:i:s).
From php manual about strtotime():
Each parameter of this function uses the default time zone unless a time zone is specified in that parameter.
Check your PHP default time zone with date_default_timezone_get() function.
To compare two dates, be sure they both are in same time zones.
For datetime inputs I personally use jQuery UI timepicker addon.
you receiving the time and date in string format - so i don't believe the ajax can interfere.
as for your question:
first of all - find out what is the locale timezone of your server. you can do it by this function: date_default_timezone_get.
if the answer doesn't suit you - you can use its "sister": date_default_timezone_set, and change it to whatever value you need (like 'Pacific/Auckland' - see the documentation there). it is also recommended to return it to the original value after you finish your stuff.
i believe fixing your locale timezone will solve your issue.
I am trying to figure out how to subtract 1 hour form the time being outputted. Our web server is 1 hour ahead of our time. I am using the following to return the time a table was created in our MySQL database.
ini_set('date.timezone', 'America/Los_Angeles');
$con = mysql_connect('localhost','database','password');
$db = mysql_select_db('database');
$sql = mysql_query("SHOW TABLE STATUS WHERE `name`=\"initm\"");
$foo = mysql_fetch_array($sql);
$ts = strtotime($foo['Create_time']);
echo "<h3>Last Updated ";
echo date('m/d/Y g:i a T', $ts);
echo "</h3>";
If I try to subtract time $ts = strtotime($foo['Create_time']-3600);
it returns Last Updated 12/31/1969 4:00 pm PST. I understand it is subtracting from the UNIX timestamp, which is defined as the number of seconds since January 1, 1970 and not from the time in the table.
I tried adding ini_set('date.timezone', 'America/Los_Angeles'); but it just changes the time zone outputted.
Any advice is greatly appreciated. A novice in PHP and MySQL.
strtotime assumes it's parameter is a string, and converts it to seconds. You need to do the subtraction after the conversion:
$ts = strtotime($foo['Create_time'])-3600;
SELECT UNIX_TIMESTAMP(Create_time) - 3600 ...
is far easier than multiple round-trips through PHP's and MySQL's date/time processing systems.
However, since strtotime is giving you invalid results, I'm guessing that whatever you're storing in Create_time is not actually a native mysql data/time value, but probably some wonky non-standard date value as a string. That means strtotime() is returning a boolean FALSE to indicate failure, and then you force PHP to convert that false to an integer 0 to handle your "minus 3600" calculation.
You should generally always store things in native formats/types, to prevent occurences such as this. Native allows you to use native facilities for processing. Custom formats mean pain/suffering
Why not :
$query = "SET time_zone = '-6:00'";
This will set your configuration in the same way as SET charset utf8.
Currently I store the time in my database like so: 2010-05-17 19:13:37
However, I need to compare two times, and I feel it would be easier to do if it were a unix timestamp such as 1274119041. (These two times are different)
So how could I convert the timestamp to unix timestamp? Is there a simple php function for it?
You're looking for strtotime()
You want strtotime:
print strtotime('2010-05-17 19:13:37'); // => 1274123617
Getting a unixtimestamp:
$unixTimestamp = time();
Converting to mysql datetime format:
$mysqlTimestamp = date("Y-m-d H:i:s", $unixTimestamp);
Getting some mysql timestamp:
$mysqlTimestamp = '2013-01-10 12:13:37';
Converting it to a unixtimestamp:
$unixTimestamp = strtotime('2010-05-17 19:13:37');
...comparing it with one or a range of times, to see if the user entered a realistic time:
if($unixTimestamp > strtotime("1999-12-15") && $unixTimestamp < strtotime("2025-12-15"))
{...}
Unix timestamps are safer too. You can do the following to check if a url passed variable is valid, before checking (for example) the previous range check:
if(ctype_digit($_GET["UpdateTimestamp"]))
{...}
If you're using MySQL as your database, it can return date fields as unix timestamps with UNIX_TIMESTAMP:
SELECT UNIX_TIMESTAMP(my_datetime_field)
You can also do it on the PHP side with strtotime:
strtotime('2010-05-17 19:13:37');
if you store the time in the database, why don't you let the database also give you the unix timestamp of it? see UNIX_TIMESTAMP(date), eg.
SELECT UNIX_TIMESTAMP(date) ...;
databases can also do date and time comparisons and arithmetic.
I have a mySQL database with a timestamp field. It currently only has one entry while I'm testing, it is
2010-02-20 13:14:09
I am pulling from the database and using
echo date("m-d-Y",$r['newsDate'])
My end result is showing as
12-31-69
Anyone know why?
Edit:
editedit:
disregard that edit... the FTP addon for notepad++ timed out and unfortunately doesn't display an error when it can't synch.
The date function expects an UNIX timestamp as its second parameter -- which means you have to convert the date you get from the DB to an UNIX timestamp, which can be done using strtotime :
$db = '2010-02-20 13:14:09';
$timestamp = strtotime($db);
echo date("m-d-Y", $timestamp);
And you'll get :
02-20-2010
You were passing the '2010-02-20 13:14:09' string to the date function ; that string is not a valid UNIX Timestamp.
'12-31-69' is probably 1970-01-01, in your locale ; and 1970-01-01 is the Epoch -- the date that corresponds to the 0 UNIX Timestamp.
For starters, the php date() function is expecting seconds as the second variable. So that accounts for why your date is displaying wrong. Check this source on that issue.
Which then provides us the answer to the problem, to get PHP to format the date from a SQL timestamp correctly, we just change the query a tad...
SELECT author, `when`
Change it to...
SELECT author, UNIX_TIMESTAMP(`when`)
Then use the PHP date function, with the variable that is storing the result of that above SQL query.
You could just use MySQL's date_format() function instead:
SELECT date_format(timestampfield, '%m-%d-%Y') FROM table etc....
This will save you having to round-trip your timestamp into unix time and then back into a normal date string in PHP. One datetime formatting call rather than two.
i think this will be useful to newble:
example basic subtraction 1 hour from date from MYSQL format:
$to='2013-25-10 22:56:00'; //curr time
$timestamp = strtotime($to); //convert to Unix timestamp
$timestamp = $timestamp-3600; //subtract 1 hour (3600 this is 1 hour in seconds)
echo date("Y-m-d H:i:s",$timestamp); //show new date
EDIT: After checking, it appears that MySQL returns a timestamp as a string to PHP, so this answer was bogus :)
Anyway, the reason you get a date in 1969 is probably that you're converting a zero unix time from UTC to localtime. The unix time is the number of seconds since 1970. So a value of 0 means 1970. You probaby live in a timezone with a negative offset, like GMT-6, which ends up being 31-12-69.
ok, I was wrestling with this for a week (longer but i took a break from it).
I have two specific fields in tables
creationDate > timestamp > current_timestamp
editDate > timestamp > current_timestamp
they were pulling out either dec 31 1969, or just nothing... annoying... very annoying
in mysql query i did:
unix_timestamp(creationDate) AS creationDate
unix_timestamp(editDate) AS editDate
in php convert i did:
$timestamp = $result_ar['creationDate'];
$creationDate = date("Y-M-d (g:i:s a)", $timestamp)
echo($creationDate);
$editstamp = $result_ar['editDate'];
$editDate = date("Y-M-d (g:i:s a)", $editstamp)
echo($editDate);
this solved my problem for me returning
2010-Jun-28 (5:33:39 pm)
2010-Jun-28 (12:09:46 pm)
respectively.
I hope this helps someone out..