Codeigniter error with json encode Cannot modify header information - headers already sent

Question

I am using codeigniter bonfire framework for creating a web. Everywhere where i m using echo json encode i am getting error in error logs like :-

ERROR - 2015-07-06 17:38:49 --> Severity: Warning  --> Cannot modify header information - headers already sent by (output started at... )

Why this error generate in error logs file. Its a example code where the warning generating.

public function get_filter()
    {
        if(!empty($_GET))
        {
            $search = $_GET;
            $restaurant = $this->discount_model->get_offer_restaurant_by_discount($_GET);
            echo json_encode($restaurant);
        }
        else{
            $restaurant = $this->discount_model->get_all_discount_restaurants();
            echo json_encode($restaurant);
        }
    }

Here the error generated at echo json_encode($restaurant) line. How to stopped this error.

Balram Khichar · Accepted Answer · 2015-07-06 14:53:40Z

1

There may be whitespace before the php open tag <?php in Your_Controller.php

Please remove whitespaces before <?php tags in all files.

answered Jul 6, 2015 at 14:53

Balram Khichar

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1 Comment

Tpojka Over a year ago

If white space, error would point on line 1. Check this answer though.

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