* @todo delete old_message_die method and write alternative HTML textual output
* in the message_die method
*/
///
/// Error constants
///
/**
* SQL_ERROR is the constant meaning the error is a SQL error.
*
* As a message_die function parameter, it allows to add SQL specific debug information.
*/
define ("SQL_ERROR", 65);
/**
* HACK_ERROR is the constant meaning access is non authorized to the resource.
*
* It encompasses two problematics:
* the URL points to a resource belonging to another user or for the current user have no access right (for malformed URL, pick instead GENERAL_ERROR) ;
* the user is anonymous, instead to be logged in.
*
* A suggested way to handle the second problematic is to store in hidden input
* fields or better in the session the previous form data, and to print a login
* form.
*
* If you implement this, you don't even need to distinguishes between the two
* cases, as once logged in, the regular HACK_ERROR could also be printed.
*/
define ("HACK_ERROR", 99);
/**
* GENERAL_ERROR is the constant meaning the error is general, ie not covered by
* another more specific error constant.
*/
define ("GENERAL_ERROR", 117);
///
/// Error helper functions
///
/**
* Output a general error, with human-readable information about the specified
* expression as error message ; terminates the current script.
*
* @see message_die
*
* @param mixed $expression the expression to be printed
* @param string $title the message title (optionnal, default will be 'Debug')
*/
function dieprint_r ($expression, $title = '') {
if (!$title) {
$title = 'Debug'; //if title is omitted or false/null, default title