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[HOW TO - vB4] Rendering templates and registering variables - a short guide
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cellarius
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cellarius cellarius is offline 11-15-2009, 10:00 PM
Introduction

Starting with vB4, templates no longer get output using eval:
PHP Code:
eval('$mytemplate = "' . fetch_template('mytemplate') . '";'); 
is outdated.
What's more: Variables and arrays from plugins that are executed on a page no longer can automatically be accessed in the templates of that page. They need to be registered first.
.
 Basic functionality to render templates and register all variables/arrays you want to use inside

PHP Code:
/* Some Code, setting variables, (multidimensional) array */
$my_var = "abc";
$my_array = array(
        'key1' => 'value1',
        'key2' => array(' 
                'key21' => 'value21',
                'key22' => 'value22'
        ')
    );

/* render template and register variables */
$templater = vB_Template::create('mytemplate');
    $templater->register('my_var', $my_var);
    $templater->register('my_array', $my_array);
$templater->render(); 
  • The first line provides the template that is to be rendered, using the new vB_Template class (vB_Template::create). The method gets passed the name of the template as an argument.
  • The following two lines register a variable and an array that we want to use in our template. Arguments passed are 1. the name you want to use to access the variable, and 2. the variable from the code you want to register. You can register as many variables/arrays as you want. Just remember you have to register every variable and array that you want to use in your custom template in this way. If you don't register them, they will not be available.
  • The fourth line renders the template ($templater->render()).
In the template you know will be able to use the registered variables/arrays in this way:
HTML Code:
{vb:raw my_var}
{vb:raw my_array.key1}
{vb:raw my_array.key2.key21}
Note the last one: multidimensional arrays are perfectly possible.
.
.
.
Now, with the result of the rendering we can do several things:
.
Output template directly - custom pages

PHP Code:
$templater = vB_Template::create('mytemplate');
    $templater->register_page_templates(); 
    $templater->register('my_var', $my_var);
    $templater->register('my_array', $my_array);
print_output($templater->render()); 
This immediatly outputs the template. Use this if you have created your own page, for example.
Note the second line, which is special for this type of use:
PHP Code:
$templater->register_page_templates(); 
This auto-registers the page level templates header, footer and headinclude that you will use in the template of your custom page.
.
Use a template hook

PHP Code:
$templater = vB_Template::create('mytemplate');
    $templater->register('my_var', $my_var);
    $templater->register('my_array', $my_array);
$template_hook[forumhome_wgo_pos2] .= $templater->render(); 
The template will be shown using the choosen template hook (for example: $template_hook[forumhome_wgo_pos2]). See the dot before the = in the last line? The hook may be used by other modifications, too, so we don't want to overwrite it, but rather append our code to it, conserving everything that might already be there.
.
Save into a variable for later use in custom template
PHP Code:
$templater = vB_Template::create('mytemplate');
    $templater->register('my_var', $my_var);
    $templater->register('my_array', $my_array);
$mytemplate_rendered = $templater->render(); 
Now we have saved the rendered template into a variable. This variable in turn we can later on register in another template, if we want:
PHP Code:
$templater = vB_Template::create('my_other_template');
     $templater->register('my_template_rendered', $my_template_rendered);
 print_output($templater->render()); 
Again, inside my_other_template we now could call
HTML Code:
{vb:raw my_template_rendered}
If you're running the first template call inside a loop, you may want to use .= instead of = in the last line, so that the results of every loop get added instead of overwriting the existing. But that depends, of course.
.
Save into an array and preregister to use in an existing/stock template
PHP Code:
$templater = vB_Template::create('mytemplate');
    $templater->register('my_var', $my_var);
    $templater->register('my_array', $my_array);
$templatevalues['my_insertvar'] = $templater->render();
vB_Template::preRegister('FORUMHOME', $templatevalues); 
  • This is another, more flexible method to save the rendered template into a variable for future use in an already existing template. In this example, we want to show our own rendered template on forumhome.
  • Problem is: We have no direct way to register variables for already existing templates like FORUMHOME. It's created and rendered in the files, and we don't want to mess there.
  • To help with this, a new method was created for vB_Template class, called preRegister. Using this, we can pass our data to FORUMHOME before it is rendered. Note that the data needs to be saved into an array ($templatevalues['my_insertvar']), a simple variable will throw an error. In the last line the array is preregistered; you need to pass as arguments 1. the name of the existing template and 2. the array that contains the data. Again, this can be done for as many arrays as needed.
  • Of course, the preRegister functionality can be used for any kind of variables or arrays, no matter whether you have saved a rendered template (like in our example) into it or it contains just a simple boolean true/false statement.
To access the data inside the template it was preregistered for use:
HTML Code:
{vb:raw my_insertvar}
Note: it is not {vb:raw templatevalues.my_insertvar}!

Essentially the same as what I put for preRegister would be the following two lines. They could replace the last two lines in the above php codebox:
PHP Code:
$my_insertvar = $templater->render();
vB_Template::preRegister('FORUMHOME',array('my_insertvar ' => $my_insertvar)); 
Of course you could add further pairs to that array if you need to preregister more than one variable.
.
.
Bonus track: ...whatever you do, cache your templates!

Now you know how to get your templates on screen - once you succeeded in doing that, make sure to do it in a fast and ressource saving manner: make use of vB's template cache. To see whether your templates are cached or not, activate debug mode by adding $config['Misc']['debug'] = true;to your config.php (don't ever use that on your live site!). Among the debug info is a list of all templates called, and non-cached templates will show up in red.

To cache your templates, add a plugin at hook cache_templates with the following code:
PHP Code:
// for a single template
$cache[] = 'mytemplate'; 

// for more than one templates in one step
$cache = array_merge((array)$cache,array(
    'mytemplate',
    'myothertemplate',
    'mythirdtemplate'
)); 
.
.
Hope this helps!
-cel

----
Addendum - There are now two blog posts on vb.com related to this topic:
http://www.vbulletin.com/forum/entry...in-4-templates
http://www.vbulletin.com/forum/entry...-4-based-files
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  #172  
Old 07-20-2011, 02:53 AM
Murtific Murtific is offline
 
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Quote:
Originally Posted by HMBeaty View Post
Just paste your code you're using inside code/html/php tags. For example:

[code.]your code here[./code]
Would be
Code:
your code here
[php.]your code here[./php]
Would be
PHP Code:
your code here 
[html.]your code here[./html]
Would be
HTML Code:
your code here
Obviously without the "." in the tags though
Thanks, got it. Now back to my previous post, anybody have any ideas?
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  #173  
Old 07-20-2011, 11:34 AM
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BirdOPrey5 BirdOPrey5 is offline
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What hook is your code on?
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  #174  
Old 07-20-2011, 02:32 PM
Murtific Murtific is offline
 
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what's a hook? I dont have a hook. I ended up just doing this. I basically just added my database code to the forum.php file and got it to work, but i have to modify every template like I mentioned in this thread, i'd rather use this thread https://vborg.vbsupport.ru/showthread.php?t=267120
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  #175  
Old 07-20-2011, 03:20 PM
kh99 kh99 is offline
 
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Quote:
Originally Posted by Murtific View Post
what's a hook? I dont have a hook. I ended up just doing this. I basically just added my database code to the forum.php file and got it to work,
[S]That's probably the issue - if you put it in after global.php, it's too late to affect the header[/S]. (Edit: actually that's wrong, I think you have until another template is rendered, so what you did could have worked, but try it with a plugin anyway.)

See my post in the other thread.
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  #176  
Old 07-23-2011, 04:36 PM
Dave-ahfb Dave-ahfb is offline
 
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First let me say that I am not PHP literate, but can find my way around 9 times out of 10.

I am creating custom templates to include my non vb scripts but am having troubles when trying to include a variable(?) from this script in any template outside the main body.

I will try to be as detailed as possible, hopefully any responses will include the information I give as a real life example so that I can get an understanding of what was done.


Goal: to take $companyname from the below script and add it to my page title, navbits etc. (currently I only get echos of $companyname or {vb:raw companyname}, depending on where I am in my efforts.
PHP Code:
if (isset($_GET['company']))
    $company = $_GET['company'];
   else
    $company = '100megs';
$result = mysql_query("select * from hostwebhost where companyname = '$company'");
if (!$result) {
$numrows = 0;
} else {
$numrows = mysql_num_rows($result);
}
for($x=0;$x<$numrows;$x++){
while ($row = mysql_fetch_array($result)){
$host_id = $row[0];
$companyname = $row[1];
$emailaddress = $row[2]; 
$URL = $row[3]; 
$track = $row[4]; 
$imgtop = $row[5]; 
$imgright = $row[6]; 
$imgbody = $row[7]; 
$joined = $row[8]; 
$password = $row[9]; 
$isvalid = $row[10]; 
$supportlist = $row[11]; 
$street1 = $row[12]; 
$street2 = $row[13]; 
$city = $row[14]; 
$state = $row[15]; 
$zip = $row[16]; 
$country = $row[17]; 
$contactname = $row[18]; 
$contactphone = $row[19]; 
$contactfax = $row[20]; 
$suggested = $row[21]; 
$comdescrip = $row[22]; 
$registered = $row[23]; 
plugin info:
PHP Code:
location: global_bootstrap_init_start
title: Webhost-php Include
execution order: 5
code:
ob_start();
ob_start();
include('/srv/www/findnewhosting.com/public_html/webhost1.php');
$webhost = ob_get_contents();
ob_end_clean(); 
vB_Template::preRegister('webhost-php', array('webhost' => $webhost)); 
As you can see the script is webhost1.phpwhich includes the first set of code above. Please note that the custom page is webhost.php which contains the following:
PHP Code:
<?php

// ####################### SET PHP ENVIRONMENT ###########################
error_reporting(E_ALL & ~E_NOTICE);

// #################### DEFINE IMPORTANT CONSTANTS #######################

define('THIS_SCRIPT', 'webhosting');
define('CSRF_PROTECTION', true);  
// change this depending on your filename

// ################### PRE-CACHE TEMPLATES AND DATA ######################
// get special phrase groups
$phrasegroups = array();

// get special data templates from the datastore
$specialtemplates = array();

// pre-cache templates used by all actions
$globaltemplates = array('webhost-php',);

// pre-cache templates used by specific actions
$actiontemplates = array();

// ######################### REQUIRE BACK-END ############################
chdir ('/srv/www/findnewhosting.com/public_html');

require_once('/srv/www/findnewhosting.com/public_html/global.php');

// #######################################################################
// ######################## START MAIN SCRIPT ############################
// #######################################################################

$navbits = construct_navbits(array('' => '&nbsp;</span></li><li class="navbit"><span><a href="/">Home</a></span></li><li class="navbit"><span><a href="../hostindex.php">Web Hosting</a></span></li><li class="navbit lastnavbit"><span>{vb:raw companyname} 

'));
$navbar = render_navbar_template($navbits);

// ###### YOUR CUSTOM CODE GOES HERE #####
$pagetitle = '$companyname';
$templater = vB_Template::create('headerincludea');
$headerincludea = $templater->render();
$templater = vB_Template::create('webhost-php');
$templater->register_page_templates();
$templater->register('navbar', $navbar);
$templater->register('pagetitle', $pagetitle);
$templater->register('sidebarext', $sidebarext);
$templater->register('sidebaropen', $sidebaropen);
$templater->register('headerincludea', $headerincludea);


print_output($templater->render());
?>
webhost-php(template):
PHP Code:
{vb:stylevar htmldoctype}
<html xmlns="http://www.w3.org/1999/xhtml" dir="{vb:stylevar textdirection}" lang="{vb:stylevar languagecode}" id="vbulletin_html">
<head>
<title>{vb:raw companyname}</title>
{vb:raw headerincludea}
{vb:raw headinclude_bottom}
</head>
<body>
{vb:raw header}
{vb:raw navbar}
{vb:raw sidebaropen}
<br />
<div id="pagetitle">
<h1>&nbsp;&nbsp;{vb:raw pagetitle}</h1><br />
</div>
<div class="blockbody">
<div class="blockrow">
<div align="center">

{vb:raw webhost}

</div>
</div>
</div>
    {vb:raw sidebarext}


    {vb:raw footer}
  </body>
</html> 
If there is any other info I can give to make it easier to solve just let me know.

Dave
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  #177  
Old 07-23-2011, 05:30 PM
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BirdOPrey5 BirdOPrey5 is offline
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I don't know if it's your only problem but you didn't register $companynanme in your webhost1.php file, so it won't show in your template.
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  #178  
Old 07-23-2011, 05:48 PM
Dave-ahfb Dave-ahfb is offline
 
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Could you dumb that down please?
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  #179  
Old 07-24-2011, 12:50 PM
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Quote:
Originally Posted by Dave-ahfb View Post
Could you dumb that down please?
At the end of webhost1.php you have this code:

Code:
$templater = vB_Template::create('webhost-php'); 
$templater->register_page_templates(); 
$templater->register('navbar', $navbar); 
$templater->register('pagetitle', $pagetitle); 
$templater->register('sidebarext', $sidebarext); 
$templater->register('sidebaropen', $sidebaropen); 
$templater->register('headerincludea', $headerincludea); 


print_output($templater->render());
You need to add this line:

Code:
$templater = vB_Template::create('webhost-php'); 
$templater->register_page_templates(); 
$templater->register('navbar', $navbar); 
$templater->register('pagetitle', $pagetitle); 
$templater->register('sidebarext', $sidebarext); 
$templater->register('sidebaropen', $sidebaropen); 
$templater->register('headerincludea', $headerincludea); 
$templater->register('companynanme', $companynanme);

print_output($templater->render());
ALL variables you need to use in a template MUST be registered to a template before you use it. If you use any other variables you must register them also.
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  #180  
Old 07-24-2011, 02:26 PM
Dave-ahfb Dave-ahfb is offline
 
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Thank you so much. As soon as I can put this paint brush down I will give it a shot.

Dave
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  #181  
Old 07-26-2011, 05:19 PM
heugabel heugabel is offline
 
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Code:
	$search_text = '<!-- end logged-in users -->';
	$vbulletin->templatecache['FORUMHOME'] = str_replace($search_text, $search_text . fetch_template('forumhome_xyz'), $vbulletin->templatecache['FORUMHOME']);
how i can rewrite this for vb4?

thank you
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