There is an error on server side code ( PHP ), I know the file but it's extremely hard to debug as there are no any error messages. All what I see is response header returns: Connection:close. No logs or anything
Is there any tool that I could use to detect or debug this on server side? To see where error happened or script interrupted?
You can manually put in some echo statements before key areas where you think the script may be failing. Try putting error_reporting(E_ALL); at the top of your scripts also.
I have the code below in an include file (slightly modified this one to remove custom code). You can use it to log error messages to a database. It uses a class to handle DB interaction, but you can change that to your own implementation. Or log it to a file.
It also outputs information to the browser, but you can discard this aswell in a production environment.
<?php
set_error_handler("ErrorHandler");
register_shutdown_function('ShutdownHandler');
function ShutdownHandler() {
$error = error_get_last();
if($error !== NULL){
switch ($error['type']) {
case E_WARNING:exit;
}
$context = get_defined_vars();
ErrorHandler($error['type'],'(SHUTDOWN) ' . $error['message'], $error['file'],$error['line'],$context);
}
}
function ErrorHandler($error_level,$error_message, $error_file,$error_line,$error_context)
{
$msg = "";
$type = FriendlyErrorType($error_level);
switch ($error_level) {
case E_USER_ERROR:
$msg .= "<div style='border:1px solid #F00;padding:10px;margin:10px;'>";
$msg .= "<h1>Error</h1>";
$msg .= "<p><b>[".$error_level."]</b>: ". $error_message . "</p>";
$msg .= "<p><b>File</b>: ". $error_file . "<br/>";
$msg .= "<b>Line</b>: ". $error_line . "</p></div>";
case E_USER_WARNING:
$msg .= "<p>Warning -> <b>[".$error_level."]</b>".$error_file." on line ". $error_line .": ". $error_message . "</p>";
break;
case E_USER_NOTICE:
$msg .= "<p>Notice -> <b>[".$error_level."]</b>".$error_file." on line ". $error_line .": ". $error_message . "</p>";
break;
default:
$msg .= "<p>".$type." -> <b>[".$error_level."]</b>".$error_file." on line ". $error_line .": ". $error_message . "</p>";
break;
}
$context = print_r($error_context, true);
$sVars = print_r($_SERVER, true);
$pVars = print_r($_POST, true);
$qVars = print_r($_GET, true);
//add to database
//custom class to add info to a database. You need to alter this to your own INSERT method.
//ct2database::query("INSERT INTO ct2_errors (`DateCreated`,`Type`,`Level`,`Message`,`Line`,`File`,`Context`,`ServerVars`,`PostVars`,`QueryVars`) VALUES ('$1','$2','$3','$4','$5','$6','$7','$8','$9','$10')", MysqlDate(), $type, $error_level,$error_message,$error_line,$error_file,$context, $sVars, $pVars, $qVars);
if ($error_level == E_USER_ERROR)
exit;
}
function FriendlyErrorType($type)
{
switch($type)
{
case E_ERROR: // 1 //
return 'E_ERROR';
case E_WARNING: // 2 //
return 'E_WARNING';
case E_PARSE: // 4 //
return 'E_PARSE';
case E_NOTICE: // 8 //
return 'E_NOTICE';
case E_CORE_ERROR: // 16 //
return 'E_CORE_ERROR';
case E_CORE_WARNING: // 32 //
return 'E_CORE_WARNING';
case E_CORE_ERROR: // 64 //
return 'E_COMPILE_ERROR';
case E_CORE_WARNING: // 128 //
return 'E_COMPILE_WARNING';
case E_USER_ERROR: // 256 //
return 'E_USER_ERROR';
case E_USER_WARNING: // 512 //
return 'E_USER_WARNING';
case E_USER_NOTICE: // 1024 //
return 'E_USER_NOTICE';
case E_STRICT: // 2048 //
return 'E_STRICT';
case E_RECOVERABLE_ERROR: // 4096 //
return 'E_RECOVERABLE_ERROR';
case E_DEPRECATED: // 8192 //
return 'E_DEPRECATED';
case E_USER_DEPRECATED: // 16384 //
return 'E_USER_DEPRECATED';
}
return "";
}
?>
