calculating the difference between times

[juanc]

Hi can someone help me please,

My goal is to add to different times into two different mySQL columns (in the same row and inputted one after the other) then calculate the number of minutes in between each.

For each column I input using strftime('%H %M', time())

Then I used this function to calculate the difference

[code]

function DateDiff
($interval,$date1,$date2) {
    // get the number of seconds between the two dates
$timedifference = $date2 - $date1;

    switch ($interval) {
        case 'w':
            $retval = bcdiv($timedifference,604800);
            break;
        case 'd':
            $retval = bcdiv($timedifference,86400);
            break;
        case 'h':
            $retval =bcdiv($timedifference,3600);
            break;
        case 'n':
            $retval = bcdiv($timedifference,60);
            break;
        case 's':
            $retval = $timedifference;
            break;
            
    }
    return $retval;

}


[/code]

Then I did

[code]

echo DateDiff('n',$row[start],$row[end]);
[/code]

but it just gives back 0 .............at the same time I'll add that the mysql columns I originally had as varchar then changed them to time

hope someone can help

[XenoPhage]

Why not use the mysql date functions? DATE_ADD and DATE_SUB ?

[a href=\"http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html\" target=\"_blank\"]http://dev.mysql.com/doc/refman/5.0/en/dat...-functions.html[/a]