I want to get a sidebar and save it in a Variable,
This is impossible with the get_sidebar function since it simply prints out
the sidebar, is there another function that I can use?
Answers:
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Method 1
You probably need to use output buffering, if I understand your question correctly.
Try something like this:
ob_start();
dynamic_sidebar('sidebar-id');
$sidebar = ob_get_contents();
ob_end_clean();
That will put the output of the sidebar into the variable $sidebar, which you can then process and return from your filter on the page content.
Method 2
The get_sidebar() function is an include function, used to include sidebar.php.
The function I think you’re after is dynamic_sidebar() (Codex ref), assuming you know the ID of the dynamic sidebar you want to use.
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