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global variable

I have one query which I use it in lots of view files and I can not cache this query because it should be change on each request:
Now I decide to call it one time in header and use this query in other views files ut I can not and I get "Undefined variable: ratesGobal"

Is there anyway to do this job?
Now I have more than 37 query in one page.

Use $this->load->vars(). It's the same as passing a $data array in $this->load->view(), but will be globally available to any view.

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