[Is it PHP : {if $related_categories}]

Many thanks [b]thorpe[/b] for your help.
Want also to say that I like phpfreaks.com.

[Is it PHP : {if $related_categories}]

I already started with basics. I am not pretentious but for the "basics" I just need few days (quelques nuits blanches).
If am able to write an emulator I think that a template engine will not fear me.
Thanks for your help but a
[code]<?php
  echo "hello world";
?>[/code]
I already know that.
Excuse for disturbing.

[Is it PHP : {if $related_categories}]

Both please.
Don't worry I learn quickly and I had many years of assembly programming. Assembly was like my mother tongue.
I stopped coding for years but the "mechanic" still nice.  ;D

[Is it PHP : {if $related_categories}]

Thanks thorpe for your quick reply.
Please is there any tutorial for this.

[Is it PHP : {if $related_categories}]

Hello everybody,
It's my first post and I just started learning PHP.
So excuse me for these newbie questions.

I open a template (with .tpl extension) and I found these snippets.

[code]
{$header}
{$lang.categories}
{/if}
{if $related_categories}
[/code]

My 1st question is :
I think it is not PHP, please can you tell me what does it mean ?

In the template I found also this :

[code]
<meta name="keywords" content="{$keywords}" />
<br />
[/code]

My 2nd question is : why is it for example [code]<br /> and not <br>[/code] ?

Thanks in advance.