Include error when sending the path to the file through a variable, why does it occur and how to solve it?

Question

CodeIgniter

I use CodeIgniter as a framework, there is a {CONTENT} tag in the template, I send it to the template like this:

$this->tp->assign('CONTENT', APPDIR . "/views/contents/main.html");

in the template itself: where APPDIR is the full path to application , as a result I get a php error that the file does not exist, although the path in the error output is displayed correctly. CHMOD on the template, include and controller - 644. If I write the entire absolute path in the template, i.e. it works (but this does not work, because then you need to create a separate template for each page, but I would like to change {CONTENT}) . Please help. PS: Changes have been made according to the article on Habré . To everyone who says that this cannot be:
include('{CONTENT}');
include("path/main.html");

Answer 1

Issue resolved. I passed the $content variable to {CONTENT}, which I presented like this (I know that it’s a crutch, but it still works, and the presence of a line break there is not very important, because html, after all):

$content = file_get_contents(APPDIR . "/views/contents/main.html");

Answer 2

If I'm not mistaken, the variables should be applied after the entire template is formed, with sub-templates, respectively, for the include('{CONTENT}'); this variable is not yet known.

Answer 3

as a result I get a php error that the file does not exist, although the path with the error is displayed correctly.

it doesn't happen.