1 <?php rcs_id('$Id: ErrorManager.php,v 1.38 2004-10-19 17:34:55 rurban Exp $');
3 if (isset($GLOBALS['ErrorManager'])) return;
5 // php5: ignore E_STRICT (var warnings)
7 if (defined('E_STRICT')
9 and (error_reporting() & E_STRICT)) {
10 echo " errormgr: error_reporting=", error_reporting();
11 echo "\nplease fix that in your php.ini!";
12 error_reporting(E_ALL & ~E_STRICT);
15 define ('EM_FATAL_ERRORS', E_ERROR | E_PARSE | E_CORE_ERROR | E_COMPILE_ERROR | E_USER_ERROR | ~2048);
16 define ('EM_WARNING_ERRORS',
17 E_WARNING | E_CORE_WARNING | E_COMPILE_WARNING | E_USER_WARNING);
18 define ('EM_NOTICE_ERRORS', E_NOTICE | E_USER_NOTICE);
20 /* It is recommended to leave assertions on.
21 You can simply comment the two lines below to leave them on.
22 Only where absolute speed is necessary you might want to turn
25 if (1 or (defined('DEBUG') and DEBUG))
26 assert_options (ASSERT_ACTIVE, 1);
28 assert_options (ASSERT_ACTIVE, 0);
29 assert_options (ASSERT_CALLBACK, 'wiki_assert_handler');
31 function wiki_assert_handler ($file, $line, $code) {
32 ErrorManager_errorHandler( $code, sprintf("<br />%s:%s: %s: Assertion failed <br />", $file, $line, $code), $file, $line);
36 * A class which allows custom handling of PHP errors.
38 * This is a singleton class. There should only be one instance
39 * of it --- you can access the one instance via $GLOBALS['ErrorManager'].
48 * As this is a singleton class, you should never call this.
51 function ErrorManager() {
52 $this->_handlers = array();
53 $this->_fatal_handler = false;
54 $this->_postpone_mask = 0;
55 $this->_postponed_errors = array();
57 set_error_handler('ErrorManager_errorHandler');
61 * Get mask indicating which errors are currently being postponed.
63 * @return int The current postponed error mask.
65 function getPostponedErrorMask() {
66 return $this->_postpone_mask;
70 * Set mask indicating which errors to postpone.
72 * The default value of the postpone mask is zero (no errors postponed.)
74 * When you set this mask, any queue errors which do not match the new
78 * @param $newmask int The new value for the mask.
80 function setPostponedErrorMask($newmask) {
81 $this->_postpone_mask = $newmask;
82 if (function_exists('PrintXML'))
83 PrintXML($this->_flush_errors($newmask));
85 echo($this->_flush_errors($newmask));
90 * Report any queued error messages.
93 function flushPostponedErrors() {
94 if (function_exists('PrintXML'))
95 PrintXML($this->_flush_errors());
97 echo $this->_flush_errors();
101 * Get postponed errors, formatted as HTML.
103 * This also flushes the postponed error queue.
105 * @return object HTML describing any queued errors (or false, if none).
107 function getPostponedErrorsAsHTML() {
108 $flushed = $this->_flush_errors();
111 if ($flushed->isEmpty())
113 // format it with the worst class (error, warning, notice)
115 $cur_err = new PhpError(0,"","","");
116 foreach ($flushed->_content as $err) {
117 if ($err and isa($err, 'PhpError') and $err->errno > $cur_err->errno) {
121 if ($cur_err->isNotice())
123 $class = $cur_err->getHtmlClass();
124 $html = HTML::div(array('class' => $class),
125 HTML::h4(array('class' => 'errors'),
126 "PHP " . $cur_err->getDescription()));
127 $html->pushContent($flushed);
132 * Push a custom error handler on the handler stack.
134 * Sometimes one is performing an operation where one expects
135 * certain errors or warnings. In this case, one might not want
136 * these errors reported in the normal manner. Installing a custom
137 * error handler via this method allows one to intercept such
140 * An error handler installed via this method should be either a
141 * function or an object method taking one argument: a PhpError
144 * The error handler should return either:
146 * <dt> False <dd> If it has not handled the error. In this case,
147 * error processing will proceed as if the handler
148 * had never been called: the error will be passed
149 * to the next handler in the stack, or the
150 * default handler, if there are no more handlers
153 * <dt> True <dd> If the handler has handled the error. If the
154 * error was a non-fatal one, no further processing
155 * will be done. If it was a fatal error, the
156 * ErrorManager will still terminate the PHP
157 * process (see setFatalHandler.)
159 * <dt> A PhpError object <dd> The error is not considered
160 * handled, and will be passed on to
161 * the next handler(s) in the stack
162 * (or the default handler). The
163 * returned PhpError need not be the
164 * same as the one passed to the
165 * handler. This allows the handler to
166 * "adjust" the error message.
169 * @param $handler WikiCallback Handler to call.
171 function pushErrorHandler($handler) {
172 array_unshift($this->_handlers, $handler);
176 * Pop an error handler off the handler stack.
179 function popErrorHandler() {
180 return array_shift($this->_handlers);
184 * Set a termination handler.
186 * This handler will be called upon fatal errors. The handler
187 * gets passed one argument: a PhpError object describing the
191 * @param $handler WikiCallback Callback to call on fatal errors.
193 function setFatalHandler($handler) {
194 $this->_fatal_handler = $handler;
200 * The error is passed through any registered error handlers, and
201 * then either reported or postponed.
204 * @param $error object A PhpError object.
206 function handleError($error) {
209 if (!empty($in_handler)) {
210 $msg = $error->_getDetail();
211 $msg->unshiftContent(HTML::h2(fmt("%s: error while handling error:",
218 foreach ($this->_handlers as $handler) {
219 if (!$handler) continue;
220 $result = $handler->call($error);
222 continue; // Handler did not handle error.
224 elseif (is_object($result)) {
225 // handler filtered the result. Still should pass to
226 // the rest of the chain.
227 if ($error->isFatal()) {
228 // Don't let handlers make fatal errors non-fatal.
229 $result->errno = $error->errno;
234 // Handler handled error.
235 if (!$error->isFatal()) {
243 $this->_noCacheHeaders();
245 // Error was either fatal, or was not handled by a handler.
246 // Handle it ourself.
247 if ($error->isFatal()) {
248 echo "<html><body><div style=\"font-weight:bold; color:red\">Fatal Error:</div>\n";
249 if (defined('DEBUG') and (DEBUG & _DEBUG_TRACE)) {
250 echo "error_reporting=",error_reporting(),"\n<br>";
251 if (function_exists("debug_backtrace")) // >= 4.3.0
252 $error->printSimpleTrace(debug_backtrace());
256 else if (($error->errno & error_reporting()) != 0) {
257 if (($error->errno & $this->_postpone_mask) != 0) {
258 if ((function_exists('is_a') and is_a($error,'PhpErrorOnce'))
259 or (!function_exists('is_a') and
261 // stdlib independent isa()
262 (strtolower(get_class($error)) == 'phperroronce')
263 or (is_subclass_of($error, 'PhpErrorOnce'))))) {
264 $error->removeDoublettes($this->_postponed_errors);
265 if ( $error->_count < 2 )
266 $this->_postponed_errors[] = $error;
268 $this->_postponed_errors[] = $error;
272 //echo "postponed errors: ";
273 if (defined('DEBUG') and (DEBUG & _DEBUG_TRACE)) {
274 echo "error_reporting=",error_reporting(),"\n";
275 if (function_exists("debug_backtrace")) // >= 4.3.0
276 $error->printSimpleTrace(debug_backtrace());
284 function warning($msg, $errno=E_USER_NOTICE) {
285 $this->handleError(new PhpWikiError($errno, $msg));
291 function _die($error) {
292 //echo "\n\n<html><body>";
294 PrintXML($this->_flush_errors());
295 if ($this->_fatal_handler)
296 $this->_fatal_handler->call($error);
303 function _flush_errors($keep_mask = 0) {
304 $errors = &$this->_postponed_errors;
305 if (empty($errors)) return '';
307 for ($i=0; $i<count($errors); $i++) {
308 $error =& $errors[$i];
309 if (($error->errno & $keep_mask) != 0)
312 $flushed->pushContent($error);
317 function _noCacheHeaders() {
319 static $already = false;
321 if (isset($request) and isset($request->_validators)) {
322 $request->_validators->_tag = false;
323 $request->_validators->_mtime = false;
325 if ($already) return;
327 // FIXME: Howto announce that to Request->cacheControl()?
328 if (!headers_sent()) {
329 header( "Cache-control: no-cache" );
330 header( "Pragma: nocache" );
337 * Global error handler for class ErrorManager.
339 * This is necessary since PHP's set_error_handler() does not allow
340 * one to set an object method as a handler.
344 function ErrorManager_errorHandler($errno, $errstr, $errfile, $errline)
346 if (!isset($GLOBALS['ErrorManager'])) {
347 $GLOBALS['ErrorManager'] = new ErrorManager;
350 $error = new PhpErrorOnce($errno, $errstr, $errfile, $errline);
351 $GLOBALS['ErrorManager']->handleError($error);
356 * A class representing a PHP error report.
358 * @see The PHP documentation for set_error_handler at
359 * http://php.net/manual/en/function.set-error-handler.php .
368 * The PHP error message.
373 * The source file where the error occurred.
378 * The line number (in $this->errfile) where the error occured.
383 * Construct a new PhpError.
385 * @param $errstr string
386 * @param $errfile string
387 * @param $errline int
389 function PhpError($errno, $errstr, $errfile, $errline) {
390 $this->errno = $errno;
391 $this->errstr = $errstr;
392 $this->errfile = $errfile;
393 $this->errline = $errline;
397 * Determine whether this is a fatal error.
398 * @return boolean True if this is a fatal error.
401 return ($this->errno & (2048|EM_WARNING_ERRORS|EM_NOTICE_ERRORS)) == 0;
405 * Determine whether this is a warning level error.
408 function isWarning() {
409 return ($this->errno & EM_WARNING_ERRORS) != 0;
413 * Determine whether this is a notice level error.
416 function isNotice() {
417 return ($this->errno & EM_NOTICE_ERRORS) != 0;
419 function getHtmlClass() {
420 if ($this->isNotice()) {
422 } elseif ($this->isWarning()) {
429 function getDescription() {
430 if ($this->isNotice()) {
432 } elseif ($this->isWarning()) {
440 * Get a printable, HTML, message detailing this error.
441 * @return object The detailed error message.
443 function _getDetail() {
444 $dir = defined('PHPWIKI_DIR') ? PHPWIKI_DIR : substr(dirname(__FILE__),0,-4);
445 if (substr(PHP_OS,0,3) == 'WIN') {
446 $dir = str_replace('/','\\',$dir);
447 $this->errfile = str_replace('/','\\',$this->errfile);
451 $errfile = preg_replace('|^' . preg_quote($dir) . '|', '', $this->errfile);
452 $lines = explode("\n", $this->errstr);
454 $msg = sprintf("%s:%d: %s[%d]: %s",
455 $errfile, $this->errline,
456 $this->getDescription(), $this->errno,
457 array_shift($lines));
459 //$html = HTML::div(array('class' => $this->getHtmlClass()), HTML::p($msg));
460 // The class is now used for the div container.
461 $html = HTML::div(HTML::p($msg));
464 foreach ($lines as $line)
465 $list->pushContent(HTML::li($line));
466 $html->pushContent($list);
473 * Print an HTMLified version of this error.
476 function printXML() {
477 PrintXML($this->_getDetail());
481 * Return an HTMLified version of this error.
484 return AsXML($this->_getDetail());
488 * Return a plain-text version of this error.
490 function asString() {
491 return AsString($this->_getDetail());
494 function printSimpleTrace($bt) {
495 global $HTTP_SERVER_VARS;
496 $nl = isset($HTTP_SERVER_VARS['REQUEST_METHOD']) ? "<br />" : "\n";
497 echo $nl."Traceback:".$nl;
498 foreach ($bt as $i => $elem) {
499 if (!array_key_exists('file', $elem)) {
502 print " " . $elem['file'] . ':' . $elem['line'] . $nl;
509 * A class representing a PhpWiki warning.
511 * This is essentially the same as a PhpError, except that the
512 * error message is quieter: no source line, etc...
514 class PhpWikiError extends PhpError {
516 * Construct a new PhpError.
518 * @param $errstr string
520 function PhpWikiError($errno, $errstr) {
521 $this->PhpError($errno, $errstr, '?', '?');
524 function _getDetail() {
525 return HTML::div(//array('class' => $this->getHtmlClass()),
526 HTML::p($this->getDescription() . ": $this->errstr"));
531 * A class representing a Php warning, printed only the first time.
533 * Similar to PhpError, except only the first same error message is printed,
534 * with number of occurences.
536 class PhpErrorOnce extends PhpError {
538 function PhpErrorOnce($errno, $errstr, $errfile, $errline) {
540 $this->PhpError($errno, $errstr, $errfile, $errline);
543 function _sameError($error) {
544 if (!$error) return false;
545 return ($this->errno == $error->errno and
546 $this->errfile == $error->errfile and
547 $this->errline == $error->errline);
550 // count similar handlers, increase _count and remove the rest
551 function removeDoublettes(&$errors) {
552 for ($i=0; $i < count($errors); $i++) {
553 if (!isset($errors[$i])) continue;
554 if ($this->_sameError($errors[$i])) {
555 $errors[$i]->_count++;
557 if ($i) unset($errors[$i]);
560 return $this->_count;
563 function _getDetail($count=0) {
564 if (!$count) $count = $this->_count;
565 $dir = defined('PHPWIKI_DIR') ? PHPWIKI_DIR : substr(dirname(__FILE__),0,-4);
566 if (substr(PHP_OS,0,3) == 'WIN') {
567 $dir = str_replace('/','\\',$dir);
568 $this->errfile = str_replace('/','\\',$this->errfile);
572 $errfile = preg_replace('|^' . preg_quote($dir) . '|', '', $this->errfile);
573 $lines = explode("\n", $this->errstr);
574 $msg = sprintf("%s:%d: %s[%d]: %s %s",
575 $errfile, $this->errline,
576 $this->getDescription(), $this->errno,
578 $count > 1 ? sprintf(" (...repeated %d times)",$count) : ""
580 $html = HTML::div(//array('class' => $this->getHtmlClass()),
584 foreach ($lines as $line)
585 $list->pushContent(HTML::li($line));
586 $html->pushContent($list);
593 require_once(dirname(__FILE__).'/HtmlElement.php');
595 if (!isset($GLOBALS['ErrorManager'])) {
596 $GLOBALS['ErrorManager'] = new ErrorManager;
599 // $Log: not supported by cvs2svn $
600 // Revision 1.37 2004/10/14 19:23:58 rurban
601 // remove debugging prints
603 // Revision 1.36 2004/10/12 15:35:43 rurban
604 // avoid Php Notice header
606 // Revision 1.35 2004/10/12 13:13:19 rurban
607 // php5 compatibility (5.0.1 ok)
609 // Revision 1.34 2004/09/24 18:52:19 rurban
610 // in deferred html error messages use the worst header and class
611 // (notice => warning => errors)
613 // Revision 1.33 2004/09/14 10:28:21 rurban
614 // use assert, maybe we should only turn it off for releases
616 // Revision 1.32 2004/07/08 13:50:32 rurban
617 // various unit test fixes: print error backtrace on _DEBUG_TRACE; allusers fix; new PHPWIKI_NOMAIN constant for omitting the mainloop
619 // Revision 1.31 2004/07/02 09:55:58 rurban
620 // more stability fixes: new DISABLE_GETIMAGESIZE if your php crashes when loading LinkIcons: failing getimagesize in old phps; blockparser stabilized
622 // Revision 1.30 2004/06/25 14:29:12 rurban
623 // WikiGroup refactoring:
624 // global group attached to user, code for not_current user.
625 // improved helpers for special groups (avoid double invocations)
626 // new experimental config option ENABLE_XHTML_XML (fails with IE, and document.write())
627 // fixed a XHTML validation error on userprefs.tmpl
629 // Revision 1.29 2004/06/20 15:30:04 rurban
630 // get_class case-sensitivity issues
632 // Revision 1.28 2004/06/16 11:51:04 rurban
633 // fixed typo: undefined object #235
635 // Revision 1.27 2004/06/13 09:38:20 rurban
636 // isa() workaround, if stdlib.php is not loaded
638 // Revision 1.26 2004/06/02 18:01:45 rurban
639 // init global FileFinder to add proper include paths at startup
640 // adds PHPWIKI_DIR if started from another dir, lib/pear also
641 // fix slashify for Windows
642 // fix USER_AUTH_POLICY=old, use only USER_AUTH_ORDER methods (besides HttpAuth)
644 // Revision 1.25 2004/06/02 10:18:36 rurban
645 // assert only if DEBUG is non-false
647 // Revision 1.24 2004/05/27 17:49:05 rurban
648 // renamed DB_Session to DbSession (in CVS also)
649 // added WikiDB->getParam and WikiDB->getAuthParam method to get rid of globals
650 // remove leading slash in error message
651 // added force_unlock parameter to File_Passwd (no return on stale locks)
652 // fixed adodb session AffectedRows
653 // added FileFinder helpers to unify local filenames and DATA_PATH names
654 // editpage.php: new edit toolbar javascript on ENABLE_EDIT_TOOLBAR
658 // (c-file-style: "gnu")
663 // c-hanging-comment-ender-p: nil
664 // indent-tabs-mode: nil