Re: CakePHP - Warning - Cannot modify header information - headers already sent by

Very good Marcus Silva work fine :).

On Thursday, October 16, 2008 6:05:54 PM UTC+7, Marcus Silva wrote:

Try removing any hidden character you may have after the php closing
tag (?>).

Example:

  ?>remove anything after the tag....

Hope it helps

Cheers

Marcus


On Oct 16, 11:31 am, imu <imranfastm...@gmail.com> wrote:
> --------------------------------------------------------------------------------------------------------------------
>
> controller file is messages_controller.php
>
> --------------------------------------------------------------------------------------------------------------------
> <?php
>     class MessagesController extends AppController{
>         var $name = 'Messages';
>
>            var $helpers = array (
>                         'Html',
>                         'Form',
>                         'Time'
>                         );
>
>         function index($id = null ){
>               if (!$id) {
>               $this->Session->setFlash('Invalid Topic');
>               $this->redirect(array (
>                 'action' => 'index'
>               ), null, true);
>             }
>             $this->Message->recursive = 1;
>
>             $messages = $this->Message->find('all',
> array( 'conditions' => array( 'topic_id' => $id ),'order' =>
> 'Message.id DESC') );
>             $this->set('topic_id',$id);
>             $this->set('messages',$messages);
>         }
>
>         function add($id = null) {
>             if (!empty ($this->data)) {
>                 $this->Message->create();
>                     if ($this->Message->save($this->data)) {
>
>                         $this->Session->setFlash('The message has been
> added');
>                         $this->redirect(array (
>                                         'action' => 'index'
>                                         ), null, true);
>                    } else {
>                         $this->Session->setFlash('message posting
> failed. Try again.');
>                     }
>             }
>             $users = $this->Message->User->find('list');
>             $this->set('topic_id',$id);
>             $this->set('users',$users);
>          }
>
>     }
> ?>
>
> ---------------------------------------------------------------------------------------------------------------------------------
>
> My view file is messages folders in views as add.ctp
>
> ---------------------------------------------------------------------------------------------------------------------------------
>
> <?php echo $form->create('Message',array( 'url' => 'add/'.
> $topic_id ));?>
>    <fieldset>
>       <legend>New topic</legend>
>       <?php
>          echo $form->input('message_text');
>          echo $form->input('user_id');
>          echo $form->hidden('topic_id',array( 'value' => $topic_id));
>       ?>
>    </fieldset>
> <?php echo $form->end('post a message');?>
>
> <?php
>   echo $html->link('Go back', array('action'=>'index'));
> ?>
>
> ---------------------------------------------------------------------------------------------------------------------------------
>
> When I fill up the add form and submit.
> The data gets inserted into the messages table without any hiccups.
>
> But I get an error during redirection back to the index page like this
>
> ------------------------------------------------------------------------------------------------------------
>
> Warning (2): Cannot modify header information - headers already sent
> by (output started at /opt/lampp/htdocs/cake/message_board/app/
> controllers/messages_controller.php:115) [CORE/cake/libs/controller/
> controller.php, line 587]
>
> Code | Context
>
> $status =       "Location:http://localhost/cake/message_board/messages"
>
> header - [internal], line ??
> Controller::header() - CORE/cake/libs/controller/controller.php, line
> 587
> Controller::redirect() - CORE/cake/libs/controller/controller.php,
> line 568
> MessagesController::add() - APP/controllers/messages_controller.php,
> line 54
> Object::dispatchMethod() - CORE/cake/libs/object.php, line 116
> Dispatcher::_invoke() - CORE/cake/dispatcher.php, line 259
> Dispatcher::dispatch() - CORE/cake/dispatcher.php, line 213
> [main] - APP/webroot/index.php, line 90
>
> ---------------------------------------------------------------------------------------------------------------
> The redirection to the index page fails.
>
> The parameters supplied in the form in add.ctp was as I expected
> "messages/add/1" which you can see the below code
> ---------------------------------------------------------------------------------------------------------------
> <form method="post" action="/cake/message_board/messages/add/
> 1"><fieldset style="display:none;"><input type="hidden" name="_method"
> value="POST" /></fieldset>   <fieldset>
>       <legend>New topic</legend>
> ---------------------------------------------------------------------------------------------------------------
>
> Please, help me out with this problem??
>
> Thank you
>
> Imranullah Mohammed

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