function phorum_mod_event_logging_database_error($error)
{
if (!$GLOBALS["PHORUM"]["mod_event_logging"]["do_log_database_error"]) {
return $error;
}
// Check for suspended logging.
if (!empty($GLOBALS["PHORUM"]["MOD_EVENT_LOGGING"]["SUSPEND"])) {
return $error;
}
// Prevention against recursive logging calls.
if (!empty($GLOBALS["PHORUM"]["MOD_EVENT_LOGGING"]["LOOPLOCK"])) {
return $error;
}
$GLOBALS["PHORUM"]["MOD_EVENT_LOGGING"]["LOOPLOCK"]++;
// Construct a back trace.
$backtrace = phorum_generate_backtrace(3);
list($source, $from_module) = event_logging_find_source(4);
// Log the event.
event_logging_writelog(array("message" => "Database error: {$error}", "details" => $backtrace === NULL ? NULL : "\nBack trace:\n\n{$backtrace}", "loglevel" => EVENTLOG_LVL_ALERT, "source" => $source, "category" => $from_module ? EVENTLOG_CAT_MODULE : EVENTLOG_CAT_APPLICATION));
$GLOBALS["PHORUM"]["MOD_EVENT_LOGGING"]["LOOPLOCK"]--;
return $error;
}
/**
* Database error handling function.
*
* @param $error - The error message.
*/
function phorum_database_error($error)
{
$PHORUM = $GLOBALS["PHORUM"];
// Flush output that we buffered so far (for displaying a
// clean page in the admin interface).
phorum_ob_clean();
/*
* [hook]
* database_error
*
* [description]
* Give modules a chance to handle or process database errors.
* This can be useful to implement addional logging backends and/or
* alerting mechanisms. Another option is to fully override Phorum's
* default database error handling by handling the error and then
* calling exit() from the hook to prevent the default Phorum code
* from running.<sbr/>
* <sbr/>
* Note: If you decide to use the full override scenario, then
* it is best to make your module run the database_error hook
* last, so other modules can still run their hook handling
* before the script exits. To accomplish this, add this to your
* module info:
* <programlisting>
* priority: run hook database_error after *
* </programlisting>
*
* [category]
* Miscellaneous
*
* [when]
* At the start of the function
* <literal>phorum_database_error</literal> (which you can find in
* <filename>common.php</filename>). This function is called from
* the database layer when some database error occurs.
*
* [input]
* The error message that was returned from the database layer.
* This error is not HTML escaped, so if you send it to the browser,
* be sure to preprocess it using <phpfunc>htmlspecialchars</phpfunc>.
*
* [output]
* Same as input.
*
* [example]
* <hookcode>
* function phorum_mod_foo_database_error($error)
* {
* // Log database errors to syslog facility "LOCAL0".
* openlog("Phorum", LOG_PID | LOG_PERROR, LOG_LOCAL0);
* syslog(LOG_ERR, $error);
*
* return $error;
* }
* </hookcode>
*/
if (isset($PHORUM["hooks"]["database_error"])) {
phorum_hook("database_error", $error);
}
// Find out what type of error handling is required.
$logopt = isset($PHORUM["error_logging"]) ? $PHORUM["error_logging"] : 'screen';
// Create a backtrace report, so it's easier to find out where a problem
// is coming from.
$backtrace = phorum_generate_backtrace(0);
// Start the error page.
?>
<html>
<head><title>Phorum database error</title></head>
<body>
<h1>Phorum Database Error</h1>
Sorry, a Phorum database error occurred.<br/>
<?php
// In admin scripts, we will always include the
// error message inside a comment in the page.
if (defined("PHORUM_ADMIN")) {
print "<!-- " . htmlspecialchars($error, ENT_COMPAT, $PHORUM["DATA"]["HCHARSET"]) . " -->";
}
switch ($logopt) {
// Log the database error to a logfile.
case "file":
$cache_dir = $PHORUM["cache"];
$fp = fopen($cache_dir . "/phorum-sql-errors.log", "a");
fputs($fp, "Time: " . time() . "\n" . "Error: {$error}\n" . ($backtrace !== NULL ? "Back trace:\n{$backtrace}\n\n" : ""));
fclose($fp);
print "The error message has been written<br/>" . "to the phorum-sql-errors.log error log.<br/>" . "Please try again later!";
break;
// Display the database error on screen.
// Display the database error on screen.
case "screen":
$htmlbacktrace = $backtrace === NULL ? NULL : nl2br(htmlspecialchars($backtrace, ENT_COMPAT, $PHORUM["DATA"]["HCHARSET"]));
print "Please try again later!" . "<h3>Error:</h3>" . htmlspecialchars($error, ENT_COMPAT, $PHORUM["DATA"]["HCHARSET"]) . ($backtrace !== NULL ? "<h3>Backtrace:</h3>\n{$htmlbacktrace}" : "");
break;
// Send a mail to the administrator about the database error.
// Send a mail to the administrator about the database error.
case "mail":
default:
require_once "./include/email_functions.php";
$data = array("mailmessage" => "A database error occured in your Phorum installation.\n" . "\n" . "Error message:\n" . "--------------\n" . "\n" . "{$error}\n" . "\n" . ($backtrace !== NULL ? "Backtrace:\n----------\n\n{$backtrace}" : ""), "mailsubject" => "Phorum: A database error occured");
$adminmail = $PHORUM["system_email_from_address"];
phorum_email_user(array($adminmail), $data);
print "The administrator of this forum has been<br/>" . "notified by email about the error.<br/>" . "Please try again later!";
break;
}
// Finish the error page.
?>
</body>
</html>
<?php
exit;
}