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How can I use ob_start with redirect

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[eluser]Unknown[/eluser]
Hi,

I have view page submit its form to some controller then redirect back to the view page with new records.

I'm sure there is no blank spaces. I tried this solution and its works fine with me:
http://digitalpbk.com/php/warning-cannot...ready-sent

I set output_buffering = On on php.ini file.

but I need to use ob_start()instance of changing php configuration file.

How I can do it in my situation:
view sent form -> controller update database record -> controller redirect to view page again with new records.

Where should I write this function in my code?

Message error:

A PHP Error was encountered

Severity: Warning

Message: Cannot modify header information - headers already sent by (output started at D:\Programs\xampp\htdocs\Students_Website\application\models\cpanel_model.php:1)

Filename: helpers/url_helper.php

Line Number: 546


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