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I was going through invision boards codes today and I noticed this in one of the templates:
{$ibforums->lang['sm_forum_leaders']}
Can anyone explain to me how they work? I know they are replaced by actual values later on.
any article on this?
thx
asT.
Well, I only use that with the heredoc method, but I think you can use that in variables as well. For example:
As far as I know, its the same as a regular variable. I've also seen something like this: {VAR} in some of the phpBB templates, though I think those are constants.....PHP Code:$var = 'variable';
$HTML = <<<HTML
This is a $var
This is also a {$var}
HTML;
// Or:
$HTML = "This is a $var";
$HTML .= "This is also a {$var}
- Saj
I dont think it is the same as a variable in php(although i'm not 100% on this). I think its a placeholder for a template engine( which would be a template variable). The template engine parses the template replacing {$VAR} with what $VAR is.
Erh
Its a Property of an object.
u need to know OO stuff to understand it
Well, I know most basic OO stuff, and I also know it can be used out of a class....at least its worked for me...
- Saj
The curly braces are valid PHP. See http://us4.php.net/manual/en/languag...ables.variable
The syntax is most useful when dealing with variable variables, but can be used any time you need to make it especially clear to the parser what you mean.
Jason Sweat ZCE - jsweat_php@yahoo.com
Book: PHP Patterns
Good Stuff: SimpleTest PHPUnit FireFox ADOdb YUI
Detestable (adjective): software that isn't testable.
Hey, Jason got it right!For more information, check out the man pages on simple syntax and complex syntax.
thx for the replies guys.
Yep i know OO, but with a java backgroundOriginally Posted by Resident Evil
It's also handy when using arrays in strings. Like this -
PHP Code:$var = "<strong>Name:</strong> {$array['username']}<br />\n";
Ok...but he's talking about {$var} being in a template not a php script or string etc. Are you saying that by putting {$var} in a template file it will get replaced just like its in a string? I would be interested in knowing how you get this to work.
Erh
Well yes, I would guess that the template 'engine' consists more or less of a eval call.
what would a simple example look like? using eval in a simple template engine to output a simple template which contains {$var}.
Erh
What kind of template files does invision boards use?
If they just use .php files as template then they won't need to do an eval().
--ed
I would have to disagree wtih you. Eval is known to be a bit slow, so that would be a pretty awful waste. I wrote a simple template engine that I'll share, that does what I need anyway (no where near the sophystication of Smarty, but I don't need Smarty or I'd use it. This templating engine is blazing fast for the basics).
It supports variables, and it supports a tag displaying another template. I use this on all my sites.
template.php:
Tpl.php:PHP Code:<?php
class Template
{
var $template;
function Template($name)
{
$sql = mysql_query("SELECT * FROM template WHERE tpl_name='$name'");
if(mysql_num_rows($sql) == 0) die("Invalid Template (".$name.") Selected");
while($row = mysql_fetch_object($sql))
{
$this->template = $row->template;
}
}
function assign($tag, $old)
{
$this->template = str_replace("{".$tag."}", $old, $this->template);
}
function parse($tag, $class)
{
$this->template = str_replace("{".$tag."}", $class->template, $this->template);
}
function display()
{
echo $this->template;
}
}
?>
Then a quick example would be:PHP Code:class TPL{
var $tpl;
var $start;
var $stop;
function TPL($template = 'layout.html')
{
$this->tpl = new Template($template);
}
function getmicrotime(){
list($usec, $sec) = explode(" ",microtime());
return ((float)$usec + (float)$sec);
}
function compare()
{
return $this->stop - $this->start;
}
function pageStart($title = "")
{
$this->tpl->assign("TITLE", $title);
ob_start();
}
function pageFinish()
{
$content = ob_get_contents();
ob_end_clean();
$this->tpl->assign("CONTENT", $content);
$this->stop = $this->getmicrotime();
if ($_GET['debug'] == 1)
{
$debug = "[ Queries: ".$DB->querycount." | Execution Time: ".$this->compare()." ]";
$this->tpl->assign("DEBUG", $debug);
}
else
{
$this->tpl->assign("DEBUG", "");
}
echo $this->tpl->display();
}
}
And if you had a links.html, you could parse {LINKS} with another function in tpl.php. Pretty straight forward templating systme, and quick as a bee.PHP Code:<?php
require("tpl.php");
$tpl = new Tpl("layout.html");
$tpl->pageStart("Test Page");
?>
Content..
<?php
$tpl->pageFinish();
?>
Thoguth I'd share this.
Regards,
Nathan Wong
P.S. If anybody needs an explination, I'd be happy to explain.
[ Edit: Ignore $DB, my bad, it's a MySQL abstration layer I use and I guess I use it on all my pages too...
- Nathan
(Sorry to post twice in a row)
IPB's skinning system is complex. I'm currently doing a job that needs integration. The /s1/skin_whatever.php file is a bunch of PHP functions with HTML in it. Each function just has a return, with an <<<EOF EOF; to output it. I presume the administration panel just calls the functions when neccesary to get the output, and does an actual fwrite to the PHP file appropriately (bit of coding work there I presume).
To call it, you go $this->html = $std->load_template("skin_whatever");, and then $this->html is a class. The class then lets you call functions and pass the variables to them. This is a pretty neat scheme, and is good for a developer, and I'm amazed at how they got the administration panel to work.
Edit: Oh, the main purpose of this post: IPB doesn't need eval, it's straight variables passed to the functions which are used.
- Nathan
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