Quick (probably simple) question about coding practice

[Vince889]

Hey guys,

 

Why exactly do people use multiplication when calculating time? Like when setting cookies, timeouts or something that requires second-based definitions.

 

For example, some do:

$thirty_days = time()+60*60*24*30;

 

As opposed to what I do:

$thirty_days = time()+2592000;

 

 

Why do they do that? Does it help them calculate it without a calculator? Make it easier to manage/adjust in the future? Personal preference? These are the only possible explanations I can think of. This has been bugging me for a while...am I doing something wrong?

[jcbones]

I think it is laziness.  I do the same as you do.  It isn't hard to remember that there are 86400 seconds per day, yet I see people all the time do 60*60*24. 

[voip03]

$thirty_days = time()+60*60*24*30;

The code is self explanatory.

It is good practice to write a simple and secure code.

 

[gurpreet94]

I use this method:

 

$thirty_days = time()+60*60*24*30;

 

Simply because it's easier to change the number of days or whatever you want, or spot any errors in time (for example I might put an extra 0 your way)