www.gusucode.com > Flarum开源的PHP国外手机版论坛 0.1 Beta2 源码程序 > Flarum_v0.1.beta2/flarum/vendor/filp/whoops/src/Whoops/Run.php
<?php
/**
* Whoops - php errors for cool kids
* @author Filipe Dobreira <http://github.com/filp>
*/
namespace Whoops;
use Exception;
use InvalidArgumentException;
use Whoops\Exception\ErrorException;
use Whoops\Exception\Inspector;
use Whoops\Handler\CallbackHandler;
use Whoops\Handler\Handler;
use Whoops\Handler\HandlerInterface;
class Run
{
const EXCEPTION_HANDLER = "handleException";
const ERROR_HANDLER = "handleError";
const SHUTDOWN_HANDLER = "handleShutdown";
protected $isRegistered;
protected $allowQuit = true;
protected $sendOutput = true;
/**
* @var integer|false
*/
protected $sendHttpCode = 500;
/**
* @var HandlerInterface[]
*/
protected $handlerStack = array();
protected $silencedPatterns = array();
/**
* Pushes a handler to the end of the stack
*
* @throws InvalidArgumentException If argument is not callable or instance of HandlerInterface
* @param Callable|HandlerInterface $handler
* @return Run
*/
public function pushHandler($handler)
{
if (is_callable($handler)) {
$handler = new CallbackHandler($handler);
}
if (!$handler instanceof HandlerInterface) {
throw new InvalidArgumentException(
"Argument to " . __METHOD__ . " must be a callable, or instance of"
. "Whoops\\Handler\\HandlerInterface"
);
}
$this->handlerStack[] = $handler;
return $this;
}
/**
* Removes the last handler in the stack and returns it.
* Returns null if there"s nothing else to pop.
* @return null|HandlerInterface
*/
public function popHandler()
{
return array_pop($this->handlerStack);
}
/**
* Returns an array with all handlers, in the
* order they were added to the stack.
* @return array
*/
public function getHandlers()
{
return $this->handlerStack;
}
/**
* Clears all handlers in the handlerStack, including
* the default PrettyPage handler.
* @return Run
*/
public function clearHandlers()
{
$this->handlerStack = array();
return $this;
}
/**
* @param Exception $exception
* @return Inspector
*/
protected function getInspector(Exception $exception)
{
return new Inspector($exception);
}
/**
* Registers this instance as an error handler.
* @return Run
*/
public function register()
{
if (!$this->isRegistered) {
// Workaround PHP bug 42098
// https://bugs.php.net/bug.php?id=42098
class_exists("\\Whoops\\Exception\\ErrorException");
class_exists("\\Whoops\\Exception\\FrameCollection");
class_exists("\\Whoops\\Exception\\Frame");
class_exists("\\Whoops\\Exception\\Inspector");
set_error_handler(array($this, self::ERROR_HANDLER));
set_exception_handler(array($this, self::EXCEPTION_HANDLER));
register_shutdown_function(array($this, self::SHUTDOWN_HANDLER));
$this->isRegistered = true;
}
return $this;
}
/**
* Unregisters all handlers registered by this Whoops\Run instance
* @return Run
*/
public function unregister()
{
if ($this->isRegistered) {
restore_exception_handler();
restore_error_handler();
$this->isRegistered = false;
}
return $this;
}
/**
* Should Whoops allow Handlers to force the script to quit?
* @param bool|int $exit
* @return bool
*/
public function allowQuit($exit = null)
{
if (func_num_args() == 0) {
return $this->allowQuit;
}
return $this->allowQuit = (bool) $exit;
}
/**
* Silence particular errors in particular files
* @param array|string $patterns List or a single regex pattern to match
* @param int $levels Defaults to E_STRICT | E_DEPRECATED
* @return \Whoops\Run
*/
public function silenceErrorsInPaths($patterns, $levels = 10240)
{
$this->silencedPatterns = array_merge(
$this->silencedPatterns,
array_map(
function ($pattern) use ($levels) {
return array(
"pattern" => $pattern,
"levels" => $levels,
);
},
(array) $patterns
)
);
return $this;
}
/*
* Should Whoops send HTTP error code to the browser if possible?
* Whoops will by default send HTTP code 500, but you may wish to
* use 502, 503, or another 5xx family code.
*
* @param bool|int $code
* @return int|false
*/
public function sendHttpCode($code = null)
{
if (func_num_args() == 0) {
return $this->sendHttpCode;
}
if (!$code) {
return $this->sendHttpCode = false;
}
if ($code === true) {
$code = 500;
}
if ($code < 400 || 600 <= $code) {
throw new InvalidArgumentException(
"Invalid status code '$code', must be 4xx or 5xx"
);
}
return $this->sendHttpCode = $code;
}
/**
* Should Whoops push output directly to the client?
* If this is false, output will be returned by handleException
* @param bool|int $send
* @return bool
*/
public function writeToOutput($send = null)
{
if (func_num_args() == 0) {
return $this->sendOutput;
}
return $this->sendOutput = (bool) $send;
}
/**
* Handles an exception, ultimately generating a Whoops error
* page.
*
* @param Exception $exception
* @return string Output generated by handlers
*/
public function handleException(Exception $exception)
{
// Walk the registered handlers in the reverse order
// they were registered, and pass off the exception
$inspector = $this->getInspector($exception);
// Capture output produced while handling the exception,
// we might want to send it straight away to the client,
// or return it silently.
ob_start();
// Just in case there are no handlers:
$handlerResponse = null;
foreach (array_reverse($this->handlerStack) as $handler) {
$handler->setRun($this);
$handler->setInspector($inspector);
$handler->setException($exception);
// The HandlerInterface does not require an Exception passed to handle()
// and neither of our bundled handlers use it.
// However, 3rd party handlers may have already relied on this parameter,
// and removing it would be possibly breaking for users.
$handlerResponse = $handler->handle($exception);
if (in_array($handlerResponse, array(Handler::LAST_HANDLER, Handler::QUIT))) {
// The Handler has handled the exception in some way, and
// wishes to quit execution (Handler::QUIT), or skip any
// other handlers (Handler::LAST_HANDLER). If $this->allowQuit
// is false, Handler::QUIT behaves like Handler::LAST_HANDLER
break;
}
}
$willQuit = $handlerResponse == Handler::QUIT && $this->allowQuit();
$output = ob_get_clean();
// If we're allowed to, send output generated by handlers directly
// to the output, otherwise, and if the script doesn't quit, return
// it so that it may be used by the caller
if ($this->writeToOutput()) {
// @todo Might be able to clean this up a bit better
// If we're going to quit execution, cleanup all other output
// buffers before sending our own output:
if ($willQuit) {
while (ob_get_level() > 0) {
ob_end_clean();
}
}
$this->writeToOutputNow($output);
}
if ($willQuit) {
flush(); // HHVM fix for https://github.com/facebook/hhvm/issues/4055
exit(1);
}
return $output;
}
/**
* Converts generic PHP errors to \ErrorException
* instances, before passing them off to be handled.
*
* This method MUST be compatible with set_error_handler.
*
* @param int $level
* @param string $message
* @param string $file
* @param int $line
*
* @return bool
* @throws ErrorException
*/
public function handleError($level, $message, $file = null, $line = null)
{
if ($level & error_reporting()) {
foreach ($this->silencedPatterns as $entry) {
$pathMatches = (bool) preg_match($entry["pattern"], $file);
$levelMatches = $level & $entry["levels"];
if ($pathMatches && $levelMatches) {
// Ignore the error, abort handling
return true;
}
}
// XXX we pass $level for the "code" param only for BC reasons.
// see https://github.com/filp/whoops/issues/267
$exception = new ErrorException($message, /*code*/ $level, /*severity*/ $level, $file, $line);
if ($this->canThrowExceptions) {
throw $exception;
} else {
$this->handleException($exception);
}
// Do not propagate errors which were already handled by Whoops.
return true;
}
// Propagate error to the next handler, allows error_get_last() to
// work on silenced errors.
return false;
}
/**
* Special case to deal with Fatal errors and the like.
*/
public function handleShutdown()
{
// If we reached this step, we are in shutdown handler.
// An exception thrown in a shutdown handler will not be propagated
// to the exception handler. Pass that information along.
$this->canThrowExceptions = false;
$error = error_get_last();
if ($error && $this->isLevelFatal($error['type'])) {
// If there was a fatal error,
// it was not handled in handleError yet.
$this->handleError(
$error['type'],
$error['message'],
$error['file'],
$error['line']
);
}
}
/**
* In certain scenarios, like in shutdown handler, we can not throw exceptions
* @var bool
*/
private $canThrowExceptions = true;
/**
* Echo something to the browser
* @param string $output
* @return $this
*/
private function writeToOutputNow($output)
{
if ($this->sendHttpCode() && \Whoops\Util\Misc::canSendHeaders()) {
$httpCode = $this->sendHttpCode();
if (function_exists('http_response_code')) {
http_response_code($httpCode);
} else {
// http_response_code is added in 5.4.
// For compatibility with 5.3 we use the third argument in header call
// First argument must be a real header.
// If it is empty, PHP will ignore the third argument.
// If it is invalid, such as a single space, Apache will handle it well,
// but the PHP development server will hang.
// Setting a full status line would require us to hardcode
// string values for all different status code, and detect the protocol.
// which is an extra error-prone complexity.
header('X-Ignore-This: 1', true, $httpCode);
}
}
echo $output;
return $this;
}
private static function isLevelFatal($level)
{
$errors = E_ERROR;
$errors |= E_PARSE;
$errors |= E_CORE_ERROR;
$errors |= E_CORE_WARNING;
$errors |= E_COMPILE_ERROR;
$errors |= E_COMPILE_WARNING;
return ($level & $errors) > 0;
}
}