Perform simple calculations inside templates!

[Lea Verou]

I was quite excited to find this out!

Have you ever wanted to make a simple calculation for a template, like an addition or subtraction? Personally, I needed this many times and most of them I created a plugin for that. Today I discovered that that is unecessary. You can use the conditional to make simple calculations. For instance, lets suppose you want to display somewhere the userid of the current user, incremented by one. You could do this:

<if condition="$nextid = $bbuserinfo['userid']+1"></if>
The next userid is $nextid.


This will display as (given that the userid of the user viewing is 1):
The next userid is 2.

Of course the userid example is very simple, just to make you understand what I'm talking about.

Let me know if it helped you! :)

[Antivirus]

interesting, thanks!

[Kaelon]

Very cool! Thanks, Michelle!

[Chunky Monkey]

Is there a way we can use this to generate a random number and then test against it so that something happens only 1/X times?

[Lea Verou]

Nope. The functions for random number generation aren't allowed in templates, so you have to use a plugin.

[Chunky Monkey]

Thank you, Michelle.

[gmert]

Could I change the numbers by myself ????????
for examble, the number 41, to put the number 88 or number 14 ????






https://vborg.vbsupport.ru/external/2009/05/43.jpg

[ragtek]

Nope. The functions for random number generation aren't allowed in templates, so you have to use a plugin.

Mmaybe you could put it into the $safe_functions variable and use it this way;)

[gmert]

How could i do it ??????

[L2V]

Anyone know what kinds of simple calculations can be done using this method?

[Lea Verou]

Anyone know what kinds of simple calculations can be done using this method?
Anything that doesn't involve functions or the functions involved are allowed within templates.

[xlguy]

Thanks for sharing.

Could you do a multiplication? So

$newfigure = $oldfigure + $oldfigure * 0.15

Any idea?

[Lea Verou]

Yes you can.

[xlguy]

Thanks, sorry I should have been a bit clearer, what would the syntax be? :)

[Lea Verou]

<if condition="$newfigure = $oldfigure + $oldfigure * 0.15"></if>And after that, use $newfigure normally in your template

[TimberFloorAu]

What would be the format for:

Displaying the cumulative count of all a users posts ?

so if they have 5 threads.

thread a has 23 views
thread b has 34 views
thread 3 has 26 views

so on and so on...

and create code to echo the total of those views a+b+c etc

[Lea Verou]

If I understood what you're trying to do correctly, that's not possible in the templates alone.

[TimberFloorAu]

Ok thanks, back to the drawing board.

[Dax IX]

This is a great tip! I've already found a couple of uses for it. :)