I am calling get_cat() function from update_passage_list() function
This is what you’re doing:
$cpid = get_cat($cpid);
There’s nothing there that says that get_cat()
is a method of your class. It’s trying to find a function get_cat()
outside any class. To use the method of the class you need to use $this
:
$cpid = $this->get_cat($cpid);
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