1 <?php rcs_id('$Id: ErrorManager.php,v 1.36 2004-10-12 15:35:43 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-width:bold; color:red\">Fatal</div>\n";
249 if (defined('DEBUG') and (DEBUG & _DEBUG_TRACE)) {
250 echo "error_reporting=",error_reporting(),"\n<br>";
251 $error->printSimpleTrace(debug_backtrace());
255 else if (($error->errno & error_reporting()) != 0) {
256 if (($error->errno & $this->_postpone_mask) != 0) {
257 if ((function_exists('is_a') and is_a($error,'PhpErrorOnce'))
258 or (!function_exists('is_a') and
260 // stdlib independent isa()
261 (strtolower(get_class($error)) == 'phperroronce')
262 or (is_subclass_of($error, 'PhpErrorOnce'))))) {
263 $error->removeDoublettes($this->_postponed_errors);
264 if ( $error->_count < 2 )
265 $this->_postponed_errors[] = $error;
267 $this->_postponed_errors[] = $error;
271 //echo "postponed errors: ";
272 if (defined('DEBUG') and (DEBUG & _DEBUG_TRACE)) {
273 echo "error_reporting=",error_reporting(),"\n";
274 $error->printSimpleTrace(debug_backtrace());
282 function warning($msg, $errno=E_USER_NOTICE) {
283 $this->handleError(new PhpWikiError($errno, $msg));
289 function _die($error) {
290 //echo "\n\n<html><body>";
292 PrintXML($this->_flush_errors());
293 if ($this->_fatal_handler)
294 $this->_fatal_handler->call($error);
301 function _flush_errors($keep_mask = 0) {
302 $errors = &$this->_postponed_errors;
303 if (empty($errors)) return '';
305 for ($i=0; $i<count($errors); $i++) {
306 $error =& $errors[$i];
307 if (($error->errno & $keep_mask) != 0)
310 $flushed->pushContent($error);
315 function _noCacheHeaders() {
317 static $already = false;
319 if (isset($request) and isset($request->_validators)) {
320 $request->_validators->_tag = false;
321 $request->_validators->_mtime = false;
323 if ($already) return;
325 // FIXME: Howto announce that to Request->cacheControl()?
326 if (!headers_sent()) {
327 header( "Cache-control: no-cache" );
328 header( "Pragma: nocache" );
335 * Global error handler for class ErrorManager.
337 * This is necessary since PHP's set_error_handler() does not allow
338 * one to set an object method as a handler.
342 function ErrorManager_errorHandler($errno, $errstr, $errfile, $errline)
344 if (!isset($GLOBALS['ErrorManager'])) {
345 $GLOBALS['ErrorManager'] = new ErrorManager;
348 $error = new PhpErrorOnce($errno, $errstr, $errfile, $errline);
349 $GLOBALS['ErrorManager']->handleError($error);
354 * A class representing a PHP error report.
356 * @see The PHP documentation for set_error_handler at
357 * http://php.net/manual/en/function.set-error-handler.php .
366 * The PHP error message.
371 * The source file where the error occurred.
376 * The line number (in $this->errfile) where the error occured.
381 * Construct a new PhpError.
383 * @param $errstr string
384 * @param $errfile string
385 * @param $errline int
387 function PhpError($errno, $errstr, $errfile, $errline) {
388 $this->errno = $errno;
389 $this->errstr = $errstr;
390 $this->errfile = $errfile;
391 $this->errline = $errline;
395 * Determine whether this is a fatal error.
396 * @return boolean True if this is a fatal error.
399 return ($this->errno & (2048|EM_WARNING_ERRORS|EM_NOTICE_ERRORS)) == 0;
403 * Determine whether this is a warning level error.
406 function isWarning() {
407 return ($this->errno & EM_WARNING_ERRORS) != 0;
411 * Determine whether this is a notice level error.
414 function isNotice() {
415 return ($this->errno & EM_NOTICE_ERRORS) != 0;
417 function getHtmlClass() {
418 if ($this->isNotice()) {
420 } elseif ($this->isWarning()) {
427 function getDescription() {
428 if ($this->isNotice()) {
430 } elseif ($this->isWarning()) {
438 * Get a printable, HTML, message detailing this error.
439 * @return object The detailed error message.
441 function _getDetail() {
442 $dir = defined('PHPWIKI_DIR') ? PHPWIKI_DIR : substr(dirname(__FILE__),0,-4);
443 if (substr(PHP_OS,0,3) == 'WIN') {
444 $dir = str_replace('/','\\',$dir);
445 $this->errfile = str_replace('/','\\',$this->errfile);
449 $errfile = preg_replace('|^' . preg_quote($dir) . '|', '', $this->errfile);
450 $lines = explode("\n", $this->errstr);
452 $msg = sprintf("%s:%d: %s[%d]: %s",
453 $errfile, $this->errline,
454 $this->getDescription(), $this->errno,
455 array_shift($lines));
457 //$html = HTML::div(array('class' => $this->getHtmlClass()), HTML::p($msg));
458 // The class is now used for the div container.
459 $html = HTML::div(HTML::p($msg));
462 foreach ($lines as $line)
463 $list->pushContent(HTML::li($line));
464 $html->pushContent($list);
471 * Print an HTMLified version of this error.
474 function printXML() {
475 PrintXML($this->_getDetail());
479 * Return an HTMLified version of this error.
482 return AsXML($this->_getDetail());
486 * Return a plain-text version of this error.
488 function asString() {
489 return AsString($this->_getDetail());
492 function printSimpleTrace($bt) {
493 global $HTTP_SERVER_VARS;
494 $nl = isset($HTTP_SERVER_VARS['REQUEST_METHOD']) ? "<br />" : "\n";
495 echo $nl."Traceback:".$nl;
496 foreach ($bt as $i => $elem) {
497 if (!array_key_exists('file', $elem)) {
500 print " " . $elem['file'] . ':' . $elem['line'] . $nl;
507 * A class representing a PhpWiki warning.
509 * This is essentially the same as a PhpError, except that the
510 * error message is quieter: no source line, etc...
512 class PhpWikiError extends PhpError {
514 * Construct a new PhpError.
516 * @param $errstr string
518 function PhpWikiError($errno, $errstr) {
519 $this->PhpError($errno, $errstr, '?', '?');
522 function _getDetail() {
523 return HTML::div(//array('class' => $this->getHtmlClass()),
524 HTML::p($this->getDescription() . ": $this->errstr"));
529 * A class representing a Php warning, printed only the first time.
531 * Similar to PhpError, except only the first same error message is printed,
532 * with number of occurences.
534 class PhpErrorOnce extends PhpError {
536 function PhpErrorOnce($errno, $errstr, $errfile, $errline) {
538 $this->PhpError($errno, $errstr, $errfile, $errline);
541 function _sameError($error) {
542 if (!$error) return false;
543 return ($this->errno == $error->errno and
544 $this->errfile == $error->errfile and
545 $this->errline == $error->errline);
548 // count similar handlers, increase _count and remove the rest
549 function removeDoublettes(&$errors) {
550 for ($i=0; $i < count($errors); $i++) {
551 if (!isset($errors[$i])) continue;
552 if ($this->_sameError($errors[$i])) {
553 $errors[$i]->_count++;
555 if ($i) unset($errors[$i]);
558 return $this->_count;
561 function _getDetail($count=0) {
562 if (!$count) $count = $this->_count;
563 $dir = defined('PHPWIKI_DIR') ? PHPWIKI_DIR : substr(dirname(__FILE__),0,-4);
564 if (substr(PHP_OS,0,3) == 'WIN') {
565 $dir = str_replace('/','\\',$dir);
566 $this->errfile = str_replace('/','\\',$this->errfile);
570 $errfile = preg_replace('|^' . preg_quote($dir) . '|', '', $this->errfile);
571 $lines = explode("\n", $this->errstr);
572 $msg = sprintf("%s:%d: %s[%d]: %s %s",
573 $errfile, $this->errline,
574 $this->getDescription(), $this->errno,
576 $count > 1 ? sprintf(" (...repeated %d times)",$count) : ""
578 $html = HTML::div(//array('class' => $this->getHtmlClass()),
582 foreach ($lines as $line)
583 $list->pushContent(HTML::li($line));
584 $html->pushContent($list);
591 require_once(dirname(__FILE__).'/HtmlElement.php');
593 if (!isset($GLOBALS['ErrorManager'])) {
594 $GLOBALS['ErrorManager'] = new ErrorManager;
597 // $Log: not supported by cvs2svn $
598 // Revision 1.35 2004/10/12 13:13:19 rurban
599 // php5 compatibility (5.0.1 ok)
601 // Revision 1.34 2004/09/24 18:52:19 rurban
602 // in deferred html error messages use the worst header and class
603 // (notice => warning => errors)
605 // Revision 1.33 2004/09/14 10:28:21 rurban
606 // use assert, maybe we should only turn it off for releases
608 // Revision 1.32 2004/07/08 13:50:32 rurban
609 // various unit test fixes: print error backtrace on _DEBUG_TRACE; allusers fix; new PHPWIKI_NOMAIN constant for omitting the mainloop
611 // Revision 1.31 2004/07/02 09:55:58 rurban
612 // more stability fixes: new DISABLE_GETIMAGESIZE if your php crashes when loading LinkIcons: failing getimagesize in old phps; blockparser stabilized
614 // Revision 1.30 2004/06/25 14:29:12 rurban
615 // WikiGroup refactoring:
616 // global group attached to user, code for not_current user.
617 // improved helpers for special groups (avoid double invocations)
618 // new experimental config option ENABLE_XHTML_XML (fails with IE, and document.write())
619 // fixed a XHTML validation error on userprefs.tmpl
621 // Revision 1.29 2004/06/20 15:30:04 rurban
622 // get_class case-sensitivity issues
624 // Revision 1.28 2004/06/16 11:51:04 rurban
625 // fixed typo: undefined object #235
627 // Revision 1.27 2004/06/13 09:38:20 rurban
628 // isa() workaround, if stdlib.php is not loaded
630 // Revision 1.26 2004/06/02 18:01:45 rurban
631 // init global FileFinder to add proper include paths at startup
632 // adds PHPWIKI_DIR if started from another dir, lib/pear also
633 // fix slashify for Windows
634 // fix USER_AUTH_POLICY=old, use only USER_AUTH_ORDER methods (besides HttpAuth)
636 // Revision 1.25 2004/06/02 10:18:36 rurban
637 // assert only if DEBUG is non-false
639 // Revision 1.24 2004/05/27 17:49:05 rurban
640 // renamed DB_Session to DbSession (in CVS also)
641 // added WikiDB->getParam and WikiDB->getAuthParam method to get rid of globals
642 // remove leading slash in error message
643 // added force_unlock parameter to File_Passwd (no return on stale locks)
644 // fixed adodb session AffectedRows
645 // added FileFinder helpers to unify local filenames and DATA_PATH names
646 // editpage.php: new edit toolbar javascript on ENABLE_EDIT_TOOLBAR
650 // (c-file-style: "gnu")
655 // c-hanging-comment-ender-p: nil
656 // indent-tabs-mode: nil