On 25 May 2010 16:14, Bruce Gilbert <webguync@xxxxxxxxx> wrote:
> Thanks. I know my syntax isn't quite right, but is this close to what
> I need to do?
>
> echo "<tr><th>Completion Time:</th></tr><tr><td>" . date('F j, Y
> g:i:sa', strtotime($row["login_timestamp"] - ["submit_timestamp"])/60)
> . "</td></tr>";
>
No. Assuming that your timestamp is of the YYYY-mm-dd HH:ii:ss form,
you need to do (strtotime(["submit_timestamp"]) -
strtotime($row["login_timestamp"]))/60.
Regards
Peter
>
> On Tue, May 25, 2010 at 10:01 AM, Peter Lind <peter.e.lind@xxxxxxxxx> wrote:
>> On 25 May 2010 15:55, Bruce Gilbert <webguync@xxxxxxxxx> wrote:
>>> Here is the situation. I have a form which sets a timestamp when a
>>> user logs in using UPDATE in SQL. The field is called
>>> 'login_timestamp' and is in a table called 'Candidates'. I have
>>> another timestamp which is set when a user submits the form data into
>>> the DB and it is called 'submit_timestamp' . What I want to do is
>>> determine the amount of time the user takes to complete the form by
>>> subtracting the 'login_timestamp' time form the 'submit_timestamp'
>>> time. I am using SQL to extract the data here.
>>>
>>> $sql = "SELECT Responses.name,Answers,submit_timestamp,login_timestamp
>>> FROM Responses LEFT JOIN Candidates USING (user_id)";
>>>
>>> and then to display the timestamp in readable form.
>>>
>>> echo "<tr><th>Completion Time:</th></tr><tr><td>" . date('F j, Y
>>> g:i:sa', strtotime($row["login_timestamp"])) . "</td></tr>";
>>>
>>> so I need to know how to subtract from two timestamp fields, two
>>> different tables and come up with the difference in minutes.
>>>
>>
>> In case you're using MySQL, timediff can do the job:
>> http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html#function_timediff
>>
>> Otherwise, just do strtotime(endtime) - strtotime(starttime) / 60.
>> That's the difference in minutes.
>>
>> Regards
>> Peter
>>
>>
>> --
>> <hype>
>> WWW: http://plphp.dk / http://plind.dk
>> LinkedIn: http://www.linkedin.com/in/plind
>> BeWelcome/Couchsurfing: Fake51
>> Twitter: http://twitter.com/kafe15
>> </hype>
>>
>
>
>
> --
> ::Bruce::
>
--
<hype>
WWW: http://plphp.dk / http://plind.dk
LinkedIn: http://www.linkedin.com/in/plind
BeWelcome/Couchsurfing: Fake51
Twitter: http://twitter.com/kafe15
</hype>
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
