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<?php
/*
* Copyright 2015 Florian "Bluewind" Pritz <bluewind@server-speed.net>
*
* Licensed under AGPLv3
* (see COPYING for full license text)
*
*/
namespace libraries;
class ExceptionHandler {
static function setup()
{
set_error_handler(array("\libraries\ExceptionHandler", "error_handler"));
set_exception_handler(array("\libraries\ExceptionHandler", 'exception_handler'));
register_shutdown_function(array("\libraries\ExceptionHandler", "check_for_fatal"));
assert_options(ASSERT_ACTIVE, true);
assert_options(ASSERT_CALLBACK, array("\libraries\ExceptionHandler", '_assert_failure'));
}
static function error_handler($errno, $errstr, $errfile, $errline)
{
if (!(error_reporting() & $errno)) {
// This error code is not included in error_reporting
return;
}
throw new \ErrorException($errstr, 0, $errno, $errfile, $errline);
}
// Source: https://gist.github.com/abtris/1437966
static private function getExceptionTraceAsString($exception) {
$rtn = "";
$count = 0;
foreach ($exception->getTrace() as $frame) {
$args = "";
if (isset($frame['args'])) {
$args = array();
foreach ($frame['args'] as $arg) {
if (is_string($arg)) {
$args[] = "'" . $arg . "'";
} elseif (is_array($arg)) {
$args[] = "Array";
} elseif (is_null($arg)) {
$args[] = 'NULL';
} elseif (is_bool($arg)) {
$args[] = ($arg) ? "true" : "false";
} elseif (is_object($arg)) {
$args[] = get_class($arg);
} elseif (is_resource($arg)) {
$args[] = get_resource_type($arg);
} else {
$args[] = $arg;
}
}
$args = join(", ", $args);
}
$rtn .= sprintf( "#%s %s(%s): %s(%s)\n",
$count,
isset($frame['file']) ? $frame['file'] : 'unknown file',
isset($frame['line']) ? $frame['line'] : 'unknown line',
(isset($frame['class'])) ? $frame['class'].$frame['type'].$frame['function'] : $frame['function'],
$args );
$count++;
}
return $rtn;
}
static public function log_exception($ex)
{
$exceptions = array($ex);
while ($ex->getPrevious() !== null) {
$ex = $ex->getPrevious();
$exceptions[] = $ex;
}
foreach ($exceptions as $key => $e) {
$message = sprintf("Exception %d/%d '%s' with message '%s' in %s:%d\n", $key+1, count($exceptions), get_class($e), $e->getMessage(), $e->getFile(), $e->getLine());
if (method_exists($e, "get_error_id")) {
$message .= 'Error ID: '.$e->get_error_id()."\n";
}
if (method_exists($e, "get_data") && $e->get_data() !== NULL) {
$message .= 'Data: '.var_export($e->get_data(), true)."\n";
}
$message .= "Backtrace:\n".self::getExceptionTraceAsString($e)."\n";
error_log($message);
}
}
// The actual exception handler
static public function exception_handler($ex)
{
self::log_exception($ex);
$display_errors = in_array(strtolower(ini_get('display_errors')), array('1', 'on', 'true', 'stdout'));
if (php_sapi_name() === 'cli' OR defined('STDIN')) {
$display_errors = true;
}
$GLOBALS["is_error_page"] = true;
$heading = "Internal Server Error";
$message = "<p>An unhandled error occured.</p>\n";
if ($display_errors) {
$exceptions = array($ex);
while ($ex->getPrevious() !== null) {
$ex = $ex->getPrevious();
$exceptions[] = $ex;
}
foreach ($exceptions as $key => $e) {
$backtrace = self::getExceptionTraceAsString($e);
$message .= '<div>';
$message .= '<b>Exception '.($key+1).' of '.count($exceptions).'</b><br>';
$message .= '<b>Fatal error</b>: Uncaught exception '.htmlspecialchars(get_class($e)).'<br>';
$message .= '<b>Message</b>: '.htmlspecialchars($e->getMessage()).'<br>';
if (method_exists($e, "get_error_id")) {
$message .= '<b>Error ID</b>: '.htmlspecialchars($e->get_error_id()).'<br>';
}
if (method_exists($e, "get_data") && $e->get_data() !== NULL) {
$message .= '<b>Data</b>: <pre>'.htmlspecialchars(var_export($e->get_data(), true)).'</pre><br>';
}
$message .= '<b>Backtrace:</b><br>';
$message .= '<pre>'.htmlspecialchars(str_replace(FCPATH, "./", $backtrace)).'</pre>';
$message .= 'thrown in <b>'.htmlspecialchars($e->getFile()).'</b> on line <b>'.htmlspecialchars($e->getLine()).'</b><br>';
$message .= '</div>';
}
} else {
$message .="<p>More information can be found in the php error log or by enabling display_errors.</p>";
}
$message = "$message";
include VIEWPATH."/errors/html/error_general.php";
}
/**
* Checks for a fatal error, work around for set_error_handler not working on fatal errors.
*/
static public function check_for_fatal()
{
$error = error_get_last();
if (isset($error) && $error["type"] == E_ERROR) {
self::exception_handler(new \ErrorException(
$error["message"], 0, $error["type"], $error["file"], $error["line"]));
}
}
static public function assert_failure($file, $line, $expr, $message = "")
{
self::exception_handler(new Exception("assert($expr): Assertion failed in $file at line $line".($message != "" ? " with message: '$message'" : "")));
exit(1);
}
}
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