I am developing a custom theme for Drupal 7 and I m a bit stuck. I ve not posted this to the Drupal stackexchange, because I don t believe this problem relates to Drupal -- I think this is a php language issue.
Basically, Drupal looks for named files such as page.tpl.php, page--front.tpl.php, etc. Actually, those are the only two I have right now.
In my html.tpl.php file, I found it convenient to define my page s overall structure. When a different page is accessed (such as page-front, the front page), the following code is run:
<?php
$subtemplate = "front/content";
include("page.tpl.php");
?>
Nice and simple.
Now let s look at the overall HTML structure in page.tpl.php:
<?php
if(!isset($subtemplate)) {
$subtemplate = "test";
}?>
<html> (etc)
...
<?php print "from main template file:" . $content_column_class; ?>
<?php $x="hello"; ?>
<?php include "pages/$subtemplate.tpl.php"; ?>
Also quite simple. $content_column_class is provided by the theme, $x is just a test string.
Now in our subtemplate file, pages/test.tpl.php:
<?php echo $x; ?> <?php print "from sub template file:" . $content_column_class; ?>
You would expect the output to be this:
from main template file: class="col-sm-12" from sub template file: class="col-sm-12" hello
In fact, the output is this:
from main template file: class="col-sm-12" Notice: Undefined variable: x in include() (line 1 of /buildkit/build/CiviCRM/sites/all/themes/common/templates/pages/test.tpl.php). Notice: Undefined variable: content_column_class in include() (line 1 of /buildkit/build/CiviCRM/sites/all/themes/common/templates/pages/test.tpl.php).
And this I just don t understand. In fact, I have never seen anything like in all my years as a php developer. Every time I have used the include() statement or its family require, require_once, etc., script execution has continued where it left off inside the included file and variables are /always/ available to the included script. In fact, I didn t think it was /possible/ to change include() s behaviour like this.
Now, I can solve this problem:
<?php global $x; ?> <?php global $content_column_class; ?> <?php echo $x; ?> <?php print "from subtemplate:" . $content_column_class; ?>
Now the output is as expected:
from main template file: class="col-sm-12" from sub template file: class="col-sm-12" hello
Using the global keyword is inelegant and generally not recommended. Is there an easier, simpler way to do this? I am worried that there will inevitably be variables I have forgotten to globalize if I take this route.
https://wordpress.org/support/topic/passing-php-variable-between-template-files https://wordpress.org/support/topic/passing-php-variable-between-template-files
WordPress won t let you include variables in the same way that you might do on a non-WP site. One way to approach this might to use a custom field on your pages and use the value in that field to determine which stylesheet to load.
However, they dont actually say /how/ it is possible to do this.
The debug backtrace is not especially helpful:
#0 include() called at [/buildkit/build/CiviCRM/sites/all/themes/common/templates/page.tpl.php:100] #1 include(/buildkit/build/CiviCRM/sites/all/themes/common/templates /page.tpl.php) called at [/buildkit/build/CiviCRM/includes/theme.inc:1525] #2 theme_render_template(sites/all/themes/common/templates/page.tpl.php, Array ([page] => Array ([#show_messages] => 1,[#theme] => page,[#theme_wrappers] => Array ([0] => html),[#type] => page,[#icon] => ,[#icon_position] => before,[#process] => Array ([0] => bootstrap_form_process),[#pre_render] => Array ([0] => bootstrap_pre_render),[content] => Array ([workbench_block] => Array ([#markup] => ...
Is it possible? Can anyone help me understand what might be going on here and how it might be overcome?
Theme is a child theme of Drupal Bootstrap, not that I expect that would matter.
