Re: determining time difference between two timestamp fields.

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On Tue, 2010-05-25 at 15:09 -0400, Bruce Gilbert wrote:

> the resulting output with that code is a little weird. I get September
> 3, 1970 2:39:32pm
> 
> I think part of the problem is my Query. When I run it in PHP MyAdmin
> I get a null value for login_timestamp even though there is indeed a
> timestamp there. The Query again is:
> 
> SELECT Responses.editor_name,Answer1,Answer2,Answer3,Answer4,Answer5,Answer6,Answer7,Answer8,Answer9,Answer10,Answer11,Answer12,submit_timestamp,login_timestamp
>         FROM Responses LEFT JOIN Candidates USING (user_id)
> 
> login_timestamp is in a table called 'Candidates' and submit_timestamp
> is in a tables called 'Responses'.
> 
> thanks for all the help to this point.
> 
> On Tue, May 25, 2010 at 2:28 PM, Ashley Sheridan
> <ash@xxxxxxxxxxxxxxxxxxxx> wrote:
> > On Tue, 2010-05-25 at 14:22 -0400, Bruce Gilbert wrote:
> >> echo "<tr><th>Completion Time:</th></tr><tr><td>". date('F j, Y
> >> g:i:sa',strtotime($row['submit_timestamp']) -
> >> strtotime($row['login_timestamp']))/60 , "</td></tr>";
> >
> > There's a good reason for that! What you're actually doing is this:
> >
> > echo "<tr><th>Completion Time:</th></tr><tr><td>" .
> >  date('F j, Y g:i:sa',
> >    strtotime($row['submit_timestamp']) -
> >    strtotime($row['login_timestamp'])
> >  )
> >  / 60
> >  , "</td></tr>";
> >
> > You're trying to divide a string by 60, because date() returns a string.
> > Put that division inside the brackets for date() rather than outside.
> >
> > It might help to break up that whole line of output into several parts.
> > Put the date into a variable and then just output the HTML line:
> >
> > $date = date('F j, Y g:i:sa', (strtotime($row['submit_timestamp']) -
> > strtotime($row['login_timestamp']))/60);
> > echo "<tr><th>Completion Time:</th></tr><tr><td>$date</td></tr>";
> >
> >
> > Thanks,
> > Ash
> > http://www.ashleysheridan.co.uk
> >
> >
> >
> >
> 
> 
> 
> -- 
> ::Bruce::
> 


What type is that field that your date is in in the database?


ps. please try not to top-post, it breaks the normal flow of the mailing
list, and probably kills fairies too!

Thanks,
Ash
http://www.ashleysheridan.co.uk



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