codeigniter whitespace or header causing warning - php

Question

I have been getting a warning error all day yesterday and can't get it off. Don't know what is happening. it is complaining that some output was sent before execution of a redirect on property_model.php on line 1. I went there and checked for everything but no luck. I also checked for whitespaces. I am going to paste down the error and code.
A PHP Error was encountered
Severity: Warning
Message: Cannot modify header information - headers already sent by
(output started at
/home/sddhd/public_html/rsw/application/models/property_model.php:1)
Filename: helpers/url_helper.php
Line Number: 542
Now the code of model it shows above is:
<? class Property_model extends CI_Model {
function __construct()
{
parent::__construct();
}
function insert_property($propertyID)
{
$this->property_id = $propertyID;
$this->type = $_POST['property_type'];
$this->city = $_POST['property_city'];
$this->address = $_POST['property_address'];
$this->description = $_POST['property_description'];
$this->owner = $_POST['property_owner'];
$this->date_added = date("Y-m-d");
$this->price = $_POST['property_price'];
$this->offer_type = $_POST['property_offer'];
$this->contact = $_POST['property_contact'];
$this->db->insert('property', $this);
}
function insert_image_details($id, $url, $extension)
{
$current->property_id = $id;
$current->extension = $extension;
$current->url = $url;
$this->db->insert('photos', $current);
}
}
?>
and the uses of the redirect call (including whole controller call making calls to the model):
<?php
class Property extends CI_Controller {
public function __construct()
{
parent::__construct();
$this->load->helper('form');
$this->load->helper('url');
$this->load->model('property_model', 'propertymodel');
$this->load->database();
}
public function index() {
$this->load->view('home');
}
public function new_property()
{
$this->load->view('new_property', array('error' => '' ));
}
public function create_property()
{
//Pass the posted data to model for insertion
$propertyID = uniqid();
$this->propertymodel->insert_property($propertyID);
$this->do_upload($propertyID);
redirect('/home');
}
public function do_upload($propertyId)
{
$config['upload_path'] = './uploads/';
$config['allowed_types'] = 'gif|jpg|png|jpeg';
$config['max_size'] = '1000';
$config['max_width'] = '1024';
$config['max_height'] = '768';
$this->load->library('upload', $config);
if ( ! $this->upload->do_upload())
{
$error = array('error' => $this->upload->display_errors());
$this->load->view('create_property', $error);
}
else
{
$data = array('upload_data' => $this->upload->data());
//array to access all the file uploaded attributes
$image_data = $this->upload->data();
//parameters to be passed to model:
$imgUrl = "../.".$config['upload_path'].$image_data['file_name'];
//$imgTitle = $image_data['file_name'];
$fileExtension = $image_data['file_ext'];
$this->propertymodel->insert_image_details($propertyId, $imgUrl, $fileExtension);
}
}//end of function
}
?>
Any help would be greatly appreciated

Answer 1

I had the same problem. Nothing helped. Then I decided to create a complete new file and copied the content from the file that caused the error into the new one. This worked! Apparently the original file had a hidden byte at the position 0.

Answer 2

You have mistake in Property controller.
replace these two lines in the method create_property
$url= base_url().'home';
redirect($url);
with
redirect('/home');

Answer 3

Have you enabled error_reporting? The model might throw an error you don't see here. And this error causes the already sent headers.
By the way, where does $current in the method insert_image_details come from? That'll probably throw an error.

Answer 4

Might be some warning getting sent before the actual page is being load. Please turn on the error reporting using following functions in the index.php of your document root.
ini_set('display_errors', 'On');
error_reporting(E_ALL);

Answer 5

Found this alternative solution posted by another person in Stackoverflow.
//Alternate Code for solve this issue
$url = 'site/function1';
echo'
<script>
window.location.href = "'.base_url().'index.php?/'.$url.'";
</script>
';
This works really well! Hope there are no disadvantages to using this! Thanks all for support.
Codeigniter: headers already sent error