NYCPHP Meetup

[Jayesh Sheth]

Hello Joseph,

I think I know what is going wrong regarding the exception handling 
issue you mentioned.
In the SvEx class, you declared ERR_TYPE as a constant (or static member):

const ERR_TYPE = "Unknown Error";

ApplicationEx extends SvEx, and even if you redeclare ERR_TYPE in ApplicationEx, it still retains its old, immutable value from SvES, which is "Unknown Error."
If you change ERR_TYPE to be a protected member (thus inheritable by subclasses), it should work.

For example:

<?php
class SvEx extends Exception {
	
	protected $err_type = "Unknown Error";
	const ERR_DESC = "There has been an error. This error has been
logged. Please try again in a few minutes.";
	
	
	protected $_msg;
	protected $_tpl;
	protected $_error;
	
	
	public function __construct( $error = null ) {
		
		$this->_error = array(
			'type' => $this->err_type,
			'description' => self::ERR_DESC
		);
		/*
		$this->_tpl = Application::Template();
		$this->_tpl->assign( 'error_type', $this->_error['type'] );
		$this->_tpl->assign( 'error_description', $this->_error['description'] );
		*/
		$this->_msg = $error;
	
		parent::__construct($this->_msg);
	}
	
	public function Display() {
		$this->_tpl->assign('admin', 1);
		$this->_tpl->assign('msg', $this->_msg);
		$this->_tpl->display('error.tpl');
	}
}
?>

and then:

<?php
class ApplicationEx extends SvEx {
	
	protected $err_type = "Application Error";
	
	public function __construct( $msg = null ) {
		
		parent::__construct($msg);
		
		$this->_error['type'] = $this->err_type;
		
	}
}
?>
---------------------------------------------
and then a test:
---------------------------------------------
<?php
// exceptions2.php

require 'SvEx.php';
require 'ApplicationEx.php';

try 
{
   $error = 'This error goes to the ApplicationEx exception handler';
   throw new ApplicationEx($error);
} 

catch (ApplicationEx $e) 
{
   echo 'Caught exception: ',  $e->getMessage(), "\n";
   echo "<pre>";
   print_r($e);
   echo "</pre>";
}

// Continue execution
echo 'Hello World';
?>
---------------------------------
It should output the following:
---------------------------------
Caught exception: This error goes to the ApplicationEx exception handler
ApplicationEx Object
(
    [err_type:protected] => Application Error
    [_msg:protected] => This error goes to the ApplicationEx exception handler
    [_tpl:protected] => 
    [_error:protected] => Array
        (
            [type] => Application Error
            [description] => There has been an error. This error has been
logged. Please try again in a few minutes.
        )

    [message:protected] => This error goes to the ApplicationEx exception handler
    [string:private] => 
    [code:protected] => 0
    [file:protected] => C:\apachefriends\xampp\htdocs\nyphp\exceptions2.php
    [line:protected] => 10
    [trace:private] => Array
        (
        )

)

Hello World
-------------------------------------------

Hope that helps,

- Jay Sheth