When doing addition, how to have it output a leading zero?

[ghurty]

I have two variables that I am adding to each other

$time = $num1+$num2;

 

Sometimes $num1 will have a leading zero (ex: 0410) but it will always be four digits long.

 

The way it is now, if there is a leading zero, it outputs $time as a three digit number without the leading zero. How can I have it that it will output it as a four digit number?

 

 

Thanks

[taquitosensei]

use sprintf to format it

echo sprintf("%04d",$time);

[ghurty]

Thank you, but I am trying to display the number, I am using it for a file name.

 

How can I have it assign that value to a variable?

[Mchl]

*Mchl rolls eyes

$variable = sprintf("%04d",$time);

[ghurty]

Thank you.

I had googled, but all the examples of sprintf had to do with displaying results on screen.

 

Thanks

[Mchl]

Well... manual clearly says it returns string.

string sprintf  ( string $format  [, mixed $args  [, mixed $...  ]] )

 

Always check function's signature in manual, and you'll save yourself a lot of time