Variable errors

Hey all!

I added some code to my site and it works, however I get hit with these dang gone undefined variable errors :

A PHP Error was encountered

Severity: Notice
Message: Undefined variable: buddy
Filename: views/view_chat.php
Line Number: 11
Backtrace:
File: /home4/cultured/public_html/application/views/view_chat.php
Line: 11
Function: _error_handler
File: /home4/cultured/public_html/application/controllers/Register.php
Line: 63
Function: view
File: /home4/cultured/public_html/index.php
Line: 315
Function: require_once
x 

June 22, 2019

A PHP Error was encountered
Severity: Notice
Message: Use of undefined constant MAINSITE_URL - assumed 'MAINSITE_URL'
Filename: views/view_chat.php
Line Number: 16
Backtrace:
File: /home4/cultured/public_html/application/views/view_chat.php
Line: 16
Function: _error_handler
File: /home4/cultured/public_html/application/controllers/Register.php
Line: 63
Function: view
File: /home4/cultured/public_html/index.php
Line: 315
Function: require_once
MAINSITE_URL/img/avatar/
A PHP Error was encountered
Severity: Notice
Message: Undefined variable: buddyimage
Filename: views/view_chat.php
Line Number: 16
Backtrace:
File: /home4/cultured/public_html/application/views/view_chat.php
Line: 16
Function: _error_handler
File: /home4/cultured/public_html/application/controllers/Register.php
Line: 63
Function: view
File: /home4/cultured/public_html/index.php
Line: 315
Function: require_once
" />
A PHP Error was encountered
Severity: Notice
Message: Undefined variable: chat
Filename: views/view_chat.php
Line Number: 18
Backtrace:
File: /home4/cultured/public_html/application/views/view_chat.php
Line: 18
Function: _error_handler
File: /home4/cultured/public_html/application/controllers/Register.php
Line: 63
Function: view
File: /home4/cultured/public_html/index.php
Line: 315
Function: require_once

Its for this code:

<div class="headerchat"><div class="buddycontainer">&nbsp;<?php echo $buddy; ?></div>
    <div class="closecontainer"><a href="#" id="closechat" class="close">x</a>&nbsp;</div>
    <br class="breaker" />
</div>
<div align="right"><span class="gray"><?php echo date("F d, Y");?></span></div>
<div class="conversationpicture"><img src="<?php echo MAINSITE_URL; ?>/img/avatar/<?php echo $buddyimage; ?>" /></div>
<?php
if (is_array($chat)) :

Tried to define with a number but didnt think that was smart as well as  define globally but that didint make a change at all

Also these errors Im trying to fix as well:
A PHP Error was encountered

Severity: Notice
Message: Trying to get property of non-object
Filename: views/DB.class.php
Line Number: 72

For this code:
 if($result->num_rows > 0){

                while($row = $result->fetch_assoc()){
                    $data[] = $row;

Error:
A PHP Error was encountered

Severity: Notice
Message: A session had already been started - ignoring session_start()
Filename: views/profile.php
Line Number: 768

For this code:
session_start();

A PHP Error was encountered

Severity: Notice
Message: Undefined index: email
Filename: views/profile.php
Line Number: 770

For this code:
$email=$_SESSION['email'];

A PHP Error was encountered

Severity: Warning
Message: mysqli_fetch_array() expects parameter 1 to be mysqli_result, boolean given
Filename: views/profile.php
Line Number: 774

For this code:
while($row=mysqli_fetch_array($run))


Thank you for the help!!


,
Mekaboo

What variables are being passed from controller to view?
If you need a variable named $buddy in your view, then the controller should have something like this:

PHP Code:

$data['buddy'] = "George";
$this->load->view('view_chat', $data); 


CodeIgniter automatically extracts the array that you pass to a view. Look at the php documentation about the extract() function.
Constants aren't variables. You'll have to define a constant before it can be used. If you need constants globally, you can define them in application/config/constants.php.
Example:

PHP Code:

define('CURRENT_DATE_TIME', Date('Y-m-d H:i:s'));
define('MAINSITE_URL', 'https://mainsite.com'); 


In CodeIgniter, you don't initiate the session the way you're used to in "plain php".
Just autoload the session libary (in application/config/autoload.php). Then you can use $this->session-> ... the read and write session variables.

What variables are being passed from controller to view?
If you need a variable named $buddy in your view, then the controller should have something like this:

PHP Code:

$data['buddy'] = "George";
$this->load->view('view_chat', $data); 


CodeIgniter automatically extracts the array that you pass to a view. Look at the php documentation about the extract() function.
Constants aren't variables. You'll have to define a constant before it can be used. If you need constants globally, you can define them in application/config/constants.php.
Example:

PHP Code:

define('CURRENT_DATE_TIME', Date('Y-m-d H:i:s'));
define('MAINSITE_URL', 'https://mainsite.com'); 


In CodeIgniter, you don't initiate the session the way you're used to in "plain php".
Just autoload the session libary (in application/config/autoload.php). Then you can use $this->session-> ... the read and write session variables.

Thanks for the help ,

In regards to the buddy variable folks will be chatting with others who are within the DB, so should that be eliminated..I'm.trying to figure how do I add various names when it all depends on who registers with the site? Can the buddy variable be general?

What variables are being passed from controller to view?
If you need a variable named $buddy in your view, then the controller should have something like this:

PHP Code:

$data['buddy'] = "George";
$this->load->view('view_chat', $data); 


CodeIgniter automatically extracts the array that you pass to a view. Look at the php documentation about the extract() function.
Constants aren't variables. You'll have to define a constant before it can be used. If you need constants globally, you can define them in application/config/constants.php.
Example:

PHP Code:

define('CURRENT_DATE_TIME', Date('Y-m-d H:i:s'));
define('MAINSITE_URL', 'https://mainsite.com'); 


In CodeIgniter, you don't initiate the session the way you're used to in "plain php".
Just autoload the session libary (in application/config/autoload.php). Then you can use $this->session-> ... the read and write session variables.

Sorry about that, re read the comment and saw that you spoke of global  load in sessions, thanks again