date operations

[Anon]

i am trying to make date operations not referring to today which is outputed by date(), but referring to some other day.

let's say i have $date which is 2000-01-01, and i want to calculate $yesterday referring to $date, but not by using string functions, like explode() and stuff, but using date functions like mktime() and the rest...

is this possible?... and if so, how this can be done?

thanks in advance...

[[deleted]]

If you have $date="2000-01-01" then you have a string that you will have to convert somehow into a timestamp.

use mktime() and a combinarion of substring or regexpstatements to get a timestamp (number of seconds since 01-01-1970)
Then you can subtract the number of seconds in a day, and make a time-string using strftime.

[lucki]

your idea helped me a lot...
i put here a quick hack maybe will help other people...

$data1="yesterday -2 months";
echo"$data1<br>";

$data2=strtotime("$data1");
echo"$data2<br>";

setlocale(LC_TIME, "en_EN");

$data3=strftime("%Y-%m-%d",$data2);

echo"$data3<br>";