CRM/Core/Error.php

   1 <?php
   2
   3 /*
   4  +--------------------------------------------------------------------+
   5  | CiviCRM version 4.5                                                |
   6  +--------------------------------------------------------------------+
   7  | Copyright CiviCRM LLC (c) 2004-2014                                |
   8  +--------------------------------------------------------------------+
   9  | This file is a part of CiviCRM.                                    |
  10  |                                                                    |
  11  | CiviCRM is free software; you can copy, modify, and distribute it  |
  12  | under the terms of the GNU Affero General Public License           |
  13  | Version 3, 19 November 2007 and the CiviCRM Licensing Exception.   |
  14  |                                                                    |
  15  | CiviCRM is distributed in the hope that it will be useful, but     |
  16  | WITHOUT ANY WARRANTY; without even the implied warranty of         |
  17  | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.               |
  18  | See the GNU Affero General Public License for more details.        |
  19  |                                                                    |
  20  | You should have received a copy of the GNU Affero General Public   |
  21  | License and the CiviCRM Licensing Exception along                  |
  22  | with this program; if not, contact CiviCRM LLC                     |
  23  | at info[AT]civicrm[DOT]org. If you have questions about the        |
  24  | GNU Affero General Public License or the licensing of CiviCRM,     |
  25  | see the CiviCRM license FAQ at http://civicrm.org/licensing        |
  26  +--------------------------------------------------------------------+
  27 */
  28
  29 /**
  30  * Start of the Error framework. We should check out and inherit from
  31  * PEAR_ErrorStack and use that framework
  32  *
  33  * @package CRM
  34  * @copyright CiviCRM LLC (c) 2004-2014
  35  * $Id$
  36  *
  37  */
  38
  39 require_once 'PEAR/ErrorStack.php';
  40 require_once 'PEAR/Exception.php';
  41 require_once 'CRM/Core/Exception.php';
  42
  43 require_once 'Log.php';
  44
  45 /**
  46  * Class CRM_Exception
  47  */
  48 class CRM_Exception extends PEAR_Exception {
  49   // Redefine the exception so message isn't optional
  50   /**
  51    * Supported signatures:
  52    *  - PEAR_Exception(string $message);
  53    *  - PEAR_Exception(string $message, int $code);
  54    *  - PEAR_Exception(string $message, Exception $cause);
  55    *  - PEAR_Exception(string $message, Exception $cause, int $code);
  56    *  - PEAR_Exception(string $message, PEAR_Error $cause);
  57    *  - PEAR_Exception(string $message, PEAR_Error $cause, int $code);
  58    *  - PEAR_Exception(string $message, array $causes);
  59    *  - PEAR_Exception(string $message, array $causes, int $code);
  60    *
  61    * @param string exception message
  62    * @param int $code
  63    * @param Exception $previous
  64    *
  65    * @internal param array|\Exception|int|null|\PEAR_Error $exception cause
  66    * @internal param int|null $exception code or null
  67    */
  68   public function __construct($message = NULL, $code = 0, Exception$previous = NULL) {
  69     parent::__construct($message, $code, $previous);
  70   }
  71 }
  72
  73 /**
  74  * Class CRM_Core_Error
  75  */
  76 class CRM_Core_Error extends PEAR_ErrorStack {
  77
  78   /**
  79    * status code of various types of errors
  80    * @var const
  81    */
  82   CONST FATAL_ERROR = 2;
  83   CONST DUPLICATE_CONTACT = 8001;
  84   CONST DUPLICATE_CONTRIBUTION = 8002;
  85   CONST DUPLICATE_PARTICIPANT = 8003;
  86
  87   /**
  88    * We only need one instance of this object. So we use the singleton
  89    * pattern and cache the instance in this variable
  90    * @var object
  91    * @static
  92    */
  93   private static $_singleton = NULL;
  94
  95   /**
  96    * The logger object for this application
  97    * @var object
  98    * @static
  99    */
 100   private static $_log = NULL;
 101
 102   /**
 103    * If modeException == true, errors are raised as exception instead of returning civicrm_errors
 104    * @static
 105    */
 106   public static $modeException = NULL;
 107
 108   /**
 109    * singleton function used to manage this object.
 110    *
 111    * @param null $package
 112    * @param bool $msgCallback
 113    * @param bool $contextCallback
 114    * @param bool $throwPEAR_Error
 115    * @param string $stackClass
 116    *
 117    * @return object
 118    * @static
 119    */
 120    static function &singleton($package = NULL, $msgCallback = FALSE, $contextCallback = FALSE, $throwPEAR_Error = FALSE, $stackClass = 'PEAR_ErrorStack') {
 121     if (self::$_singleton === NULL) {
 122       self::$_singleton = new CRM_Core_Error('CiviCRM');
 123     }
 124     return self::$_singleton;
 125   }
 126
 127   /**
 128    * constructor
 129    */
 130   function __construct() {
 131     parent::__construct('CiviCRM');
 132
 133     $log = CRM_Core_Config::getLog();
 134     $this->setLogger($log);
 135
 136     // set up error handling for Pear Error Stack
 137     $this->setDefaultCallback(array($this, 'handlePES'));
 138   }
 139
 140   /**
 141    * @param $error
 142    * @param string $separator
 143    *
 144    * @return array|null|string
 145    */
 146   static public function getMessages(&$error, $separator = '<br />') {
 147     if (is_a($error, 'CRM_Core_Error')) {
 148       $errors = $error->getErrors();
 149       $message = array();
 150       foreach ($errors as $e) {
 151         $message[] = $e['code'] . ': ' . $e['message'];
 152       }
 153       $message = implode($separator, $message);
 154       return $message;
 155     }
 156     return NULL;
 157   }
 158
 159   /**
 160    * Status display function specific to payment processor errors
 161    * @param $error
 162    * @param string $separator
 163    */
 164   static function displaySessionError(&$error, $separator = '<br />') {
 165     $message = self::getMessages($error, $separator);
 166     if ($message) {
 167       $status = ts("Payment Processor Error message") . "{$separator} $message";
 168       $session = CRM_Core_Session::singleton();
 169       $session->setStatus($status);
 170     }
 171   }
 172
 173   /**
 174    * create the main callback method. this method centralizes error processing.
 175    *
 176    * the errors we expect are from the pear modules DB, DB_DataObject
 177    * which currently use PEAR::raiseError to notify of error messages.
 178    *
 179    * @param object PEAR_Error
 180    *
 181    * @return void
 182    * @access public
 183    */
 184   public static function handle($pearError) {
 185
 186     // setup smarty with config, session and template location.
 187     $template = CRM_Core_Smarty::singleton();
 188     $config = CRM_Core_Config::singleton();
 189
 190     if ($config->backtrace) {
 191       self::backtrace();
 192     }
 193
 194     // create the error array
 195     $error               = array();
 196     $error['callback']   = $pearError->getCallback();
 197     $error['code']       = $pearError->getCode();
 198     $error['message']    = $pearError->getMessage();
 199     $error['mode']       = $pearError->getMode();
 200     $error['debug_info'] = $pearError->getDebugInfo();
 201     $error['type']       = $pearError->getType();
 202     $error['user_info']  = $pearError->getUserInfo();
 203     $error['to_string']  = $pearError->toString();
 204     if (function_exists('mysql_error') &&
 205       mysql_error()
 206     ) {
 207       $mysql_error = mysql_error() . ', ' . mysql_errno();
 208       $template->assign_by_ref('mysql_code', $mysql_error);
 209
 210       // execute a dummy query to clear error stack
 211       mysql_query('select 1');
 212     }
 213     elseif (function_exists('mysqli_error')) {
 214       $dao = new CRM_Core_DAO();
 215
 216       // we do it this way, since calling the function
 217       // getDatabaseConnection could potentially result
 218       // in an infinite loop
 219       global $_DB_DATAOBJECT;
 220       if (isset($_DB_DATAOBJECT['CONNECTIONS'][$dao->_database_dsn_md5])) {
 221         $conn = $_DB_DATAOBJECT['CONNECTIONS'][$dao->_database_dsn_md5];
 222         $link = $conn->connection;
 223
 224         if (mysqli_error($link)) {
 225           $mysql_error = mysqli_error($link) . ', ' . mysqli_errno($link);
 226           $template->assign_by_ref('mysql_code', $mysql_error);
 227
 228           // execute a dummy query to clear error stack
 229           mysqli_query($link, 'select 1');
 230         }
 231       }
 232     }
 233
 234     $template->assign_by_ref('error', $error);
 235     $errorDetails = CRM_Core_Error::debug('', $error, FALSE);
 236     $template->assign_by_ref('errorDetails', $errorDetails);
 237
 238     CRM_Core_Error::debug_var('Fatal Error Details', $error);
 239     CRM_Core_Error::backtrace('backTrace', TRUE);
 240
 241     if ($config->initialized) {
 242       $content = $template->fetch('CRM/common/fatal.tpl');
 243       echo CRM_Utils_System::theme($content);
 244     }
 245     else {
 246       echo "Sorry. A non-recoverable error has occurred. The error trace below might help to resolve the issue<p>";
 247       CRM_Core_Error::debug(NULL, $error);
 248     }
 249     static $runOnce = FALSE;
 250     if ($runOnce) {
 251       exit;
 252     }
 253     $runOnce = TRUE;
 254     self::abend(1);
 255   }
 256
 257   // this function is used to trap and print errors
 258   // during system initialization time. Hence the error
 259   // message is quite ugly
 260   /**
 261    * @param $pearError
 262    */
 263   public static function simpleHandler($pearError) {
 264
 265     // create the error array
 266     $error               = array();
 267     $error['callback']   = $pearError->getCallback();
 268     $error['code']       = $pearError->getCode();
 269     $error['message']    = $pearError->getMessage();
 270     $error['mode']       = $pearError->getMode();
 271     $error['debug_info'] = $pearError->getDebugInfo();
 272     $error['type']       = $pearError->getType();
 273     $error['user_info']  = $pearError->getUserInfo();
 274     $error['to_string']  = $pearError->toString();
 275
 276     // ensure that debug does not check permissions since we are in bootstrap
 277     // mode and need to print a decent message to help the user
 278     CRM_Core_Error::debug('Initialization Error', $error, TRUE, TRUE, FALSE);
 279
 280     // always log the backtrace to a file
 281     self::backtrace('backTrace', TRUE);
 282
 283     exit(0);
 284   }
 285
 286   /**
 287    * Handle errors raised using the PEAR Error Stack.
 288    *
 289    * currently the handler just requests the PES framework
 290    * to push the error to the stack (return value PEAR_ERRORSTACK_PUSH).
 291    *
 292    * Note: we can do our own error handling here and return PEAR_ERRORSTACK_IGNORE.
 293    *
 294    * Also, if we do not return any value the PEAR_ErrorStack::push() then does the
 295    * action of PEAR_ERRORSTACK_PUSHANDLOG which displays the errors on the screen,
 296    * since the logger set for this error stack is 'display' - see CRM_Core_Config::getLog();
 297    *
 298    */
 299   public static function handlePES($pearError) {
 300     return PEAR_ERRORSTACK_PUSH;
 301   }
 302
 303   /**
 304    * display an error page with an error message describing what happened
 305    *
 306    * @param null $message
 307    * @param null $code
 308    * @param null $email
 309    *
 310    * @throws Exception
 311    * @internal param \message $string the error message
 312    * @internal param \code $string the error code if any
 313    * @internal param \email $string the email address to notify of this situation
 314    *
 315    * @return void
 316    * @static
 317    * @acess public
 318    */
 319   static function fatal($message = NULL, $code = NULL, $email = NULL) {
 320     $vars = array(
 321       'message' => $message,
 322       'code' => $code,
 323     );
 324
 325     if (self::$modeException) {
 326       // CRM-11043
 327       CRM_Core_Error::debug_var('Fatal Error Details', $vars);
 328       CRM_Core_Error::backtrace('backTrace', TRUE);
 329
 330       $details = 'A fatal error was triggered';
 331       if ($message) {
 332         $details .= ': ' . $message;
 333     }
 334       throw new Exception($details, $code);
 335     }
 336
 337     if (!$message) {
 338       $message = ts('We experienced an unexpected error. Please post a detailed description and the backtrace on the CiviCRM forums: %1', array(1 => 'http://forum.civicrm.org/'));
 339     }
 340
 341     if (php_sapi_name() == "cli") {
 342       print ("Sorry. A non-recoverable error has occurred.\n$message \n$code\n$email\n\n");
 343       debug_print_backtrace();
 344       die("\n");
 345       // FIXME: Why doesn't this call abend()?
 346       // Difference: abend() will cleanup transaction and (via civiExit) store session state
 347       // self::abend(CRM_Core_Error::FATAL_ERROR);
 348     }
 349
 350     $config = CRM_Core_Config::singleton();
 351
 352     if ($config->fatalErrorHandler &&
 353       function_exists($config->fatalErrorHandler)
 354     ) {
 355       $name = $config->fatalErrorHandler;
 356       $ret = $name($vars);
 357       if ($ret) {
 358         // the call has been successfully handled
 359         // so we just exit
 360         self::abend(CRM_Core_Error::FATAL_ERROR);
 361       }
 362     }
 363
 364     // If we are in an ajax callback, format output appropriately
 365     if (CRM_Utils_Array::value('snippet', $_REQUEST) === CRM_Core_Smarty::PRINT_JSON) {
 366       $out = array(
 367         'status' => 'fatal',
 368         'content' => '<div class="messages status no-popup"><div class="icon inform-icon"></div>' . ts('Sorry but we are not able to provide this at the moment.') . '</div>',
 369       );
 370       if ($config->backtrace && CRM_Core_Permission::check('view debug output')) {
 371         $out['backtrace'] = self::parseBacktrace(debug_backtrace());
 372         $message .= '<p><em>See console for backtrace</em></p>';
 373       }
 374       CRM_Core_Session::setStatus($message, ts('Sorry an Error Occured'), 'error');
 375       CRM_Core_Transaction::forceRollbackIfEnabled();
 376       CRM_Core_Page_AJAX::returnJsonResponse($out);
 377     }
 378
 379     if ($config->backtrace) {
 380       self::backtrace();
 381     }
 382
 383     $template = CRM_Core_Smarty::singleton();
 384     $template->assign($vars);
 385
 386     CRM_Core_Error::debug_var('Fatal Error Details', $vars);
 387     CRM_Core_Error::backtrace('backTrace', TRUE);
 388     $config->userSystem->outputError($template->fetch($config->fatalErrorTemplate));
 389
 390     self::abend(CRM_Core_Error::FATAL_ERROR);
 391   }
 392
 393   /**
 394    * display an error page with an error message describing what happened
 395    *
 396    * This function is evil -- it largely replicates fatal(). Hopefully the
 397    * entire CRM_Core_Error system can be hollowed out and replaced with
 398    * something that follows a cleaner separation of concerns.
 399    *
 400    * @param Exception $exception
 401    *
 402    * @return void
 403    * @static
 404    * @acess public
 405    */
 406   static function handleUnhandledException($exception) {
 407     $config = CRM_Core_Config::singleton();
 408     $vars = array(
 409       'message' => $exception->getMessage(),
 410       'code' => NULL,
 411       'exception' => $exception,
 412     );
 413     if (!$vars['message']) {
 414       $vars['message'] = ts('We experienced an unexpected error. Please post a detailed description and the backtrace on the CiviCRM forums: %1', array(1 => 'http://forum.civicrm.org/'));
 415     }
 416
 417     // Case A: CLI
 418     if (php_sapi_name() == "cli") {
 419       printf("Sorry. A non-recoverable error has occurred.\n%s\n", $vars['message']);
 420       print self::formatTextException($exception);
 421       die("\n");
 422       // FIXME: Why doesn't this call abend()?
 423       // Difference: abend() will cleanup transaction and (via civiExit) store session state
 424       // self::abend(CRM_Core_Error::FATAL_ERROR);
 425     }
 426
 427     // Case B: Custom error handler
 428     if ($config->fatalErrorHandler &&
 429       function_exists($config->fatalErrorHandler)
 430     ) {
 431       $name = $config->fatalErrorHandler;
 432       $ret = $name($vars);
 433       if ($ret) {
 434         // the call has been successfully handled
 435         // so we just exit
 436         self::abend(CRM_Core_Error::FATAL_ERROR);
 437       }
 438     }
 439
 440     // Case C: Default error handler
 441
 442     // log to file
 443     CRM_Core_Error::debug_var('Fatal Error Details', $vars);
 444     CRM_Core_Error::backtrace('backTrace', TRUE);
 445
 446     // print to screen
 447     $template = CRM_Core_Smarty::singleton();
 448     $template->assign($vars);
 449     $content = $template->fetch($config->fatalErrorTemplate);
 450     if ($config->backtrace) {
 451       $content = self::formatHtmlException($exception) . $content;
 452     }
 453     if ($config->userFramework == 'Joomla' &&
 454       class_exists('JError')
 455     ) {
 456       JError::raiseError('CiviCRM-001', $content);
 457     }
 458     else {
 459       echo CRM_Utils_System::theme($content);
 460     }
 461
 462     // fin
 463     self::abend(CRM_Core_Error::FATAL_ERROR);
 464   }
 465
 466   /**
 467    * outputs pre-formatted debug information. Flushes the buffers
 468    * so we can interrupt a potential POST/redirect
 469    *
 470    * @param  string name of debug section
 471    * @param  mixed  reference to variables that we need a trace of
 472    * @param  bool   should we log or return the output
 473    * @param  bool   whether to generate a HTML-escaped output
 474    * @param  bool   should we check permissions before displaying output
 475    *                useful when we die during initialization and permissioning
 476    *                subsystem is not initialized - CRM-13765
 477    *
 478    * @return string the generated output
 479    * @access public
 480    * @static
 481    */
 482   static function debug($name, $variable = NULL, $log = TRUE, $html = TRUE, $checkPermission = TRUE) {
 483     $error = self::singleton();
 484
 485     if ($variable === NULL) {
 486       $variable = $name;
 487       $name = NULL;
 488     }
 489
 490     $out = print_r($variable, TRUE);
 491     $prefix = NULL;
 492     if ($html) {
 493       $out = htmlspecialchars($out);
 494       if ($name) {
 495         $prefix = "<p>$name</p>";
 496       }
 497       $out = "{$prefix}<p><pre>$out</pre></p><p></p>";
 498     }
 499     else {
 500       if ($name) {
 501         $prefix = "$name:\n";
 502       }
 503       $out = "{$prefix}$out\n";
 504     }
 505     if (
 506       $log &&
 507       (!$checkPermission || CRM_Core_Permission::check('view debug output'))
 508     ) {
 509       echo $out;
 510     }
 511
 512     return $out;
 513   }
 514
 515   /**
 516    * Similar to the function debug. Only difference is
 517    * in the formatting of the output.
 518    *
 519    * @param $variable_name
 520    * @param $variable
 521    * @param bool $print
 522    * @param bool $log
 523    * @param string $comp variable name
 524    *
 525    * @internal param \reference $mixed to variables that we need a trace of
 526    * @internal param \should $bool we use print_r ? (else we use var_dump)
 527    * @internal param \should $bool we log or return the output
 528    *
 529    * @return string the generated output
 530    *
 531    * @access public
 532    *
 533    * @static
 534    *
 535    * @see CRM_Core_Error::debug()
 536    * @see CRM_Core_Error::debug_log_message()
 537    */
 538   static function debug_var($variable_name,
 539     $variable,
 540     $print = TRUE,
 541     $log   = TRUE,
 542     $comp  = ''
 543   ) {
 544     // check if variable is set
 545     if (!isset($variable)) {
 546       $out = "\$$variable_name is not set";
 547     }
 548     else {
 549       if ($print) {
 550         $out = print_r($variable, TRUE);
 551         $out = "\$$variable_name = $out";
 552       }
 553       else {
 554         // use var_dump
 555         ob_start();
 556         var_dump($variable);
 557         $dump = ob_get_contents();
 558         ob_end_clean();
 559         $out = "\n\$$variable_name = $dump";
 560       }
 561       // reset if it is an array
 562       if (is_array($variable)) {
 563         reset($variable);
 564       }
 565     }
 566     return self::debug_log_message($out, FALSE, $comp);
 567   }
 568
 569   /**
 570    * display the error message on terminal
 571    *
 572    * @param $message
 573    * @param bool $out should we log or return the output
 574    *
 575    * @param string $comp message to be output
 576    * @return string format of the backtrace
 577    *
 578    * @access public
 579    *
 580    * @static
 581    */
 582   static function debug_log_message($message, $out = FALSE, $comp = '') {
 583     $config = CRM_Core_Config::singleton();
 584
 585     $file_log = self::createDebugLogger($comp);
 586     $file_log->log("$message\n");
 587     $str = "<p/><code>$message</code>";
 588     if ($out && CRM_Core_Permission::check('view debug output')) {
 589       echo $str;
 590     }
 591     $file_log->close();
 592
 593     if ($config->userFrameworkLogging) {
 594       // should call $config->userSystem->logger($message) here - but I got a situation where userSystem was not an object - not sure why
 595       if ($config->userSystem->is_drupal and function_exists('watchdog')) {
 596         watchdog('civicrm', $message, NULL, WATCHDOG_DEBUG);
 597       }
 598     }
 599
 600     return $str;
 601   }
 602
 603   /**
 604    * Append to the query log (if enabled)
 605    */
 606   static function debug_query($string) {
 607     if ( defined( 'CIVICRM_DEBUG_LOG_QUERY' ) ) {
 608       if ( CIVICRM_DEBUG_LOG_QUERY == 'backtrace' ) {
 609         CRM_Core_Error::backtrace( $string, true );
 610       } else if ( CIVICRM_DEBUG_LOG_QUERY ) {
 611         CRM_Core_Error::debug_var( 'Query', $string, false, true );
 612       }
 613     }
 614   }
 615
 616   /**
 617    * Obtain a reference to the error log
 618    *
 619    * @param string $comp
 620    *
 621    * @return Log
 622    */
 623   static function createDebugLogger($comp = '') {
 624     $config = CRM_Core_Config::singleton();
 625
 626     if ($comp) {
 627       $comp = $comp . '.';
 628     }
 629
 630     $fileName = "{$config->configAndLogDir}CiviCRM." . $comp . md5($config->dsn) . '.log';
 631
 632     // Roll log file monthly or if greater than 256M
 633     // note that PHP file functions have a limit of 2G and hence
 634     // the alternative was introduce
 635     if (file_exists($fileName)) {
 636       $fileTime = date("Ym", filemtime($fileName));
 637       $fileSize = filesize($fileName);
 638       if (($fileTime < date('Ym')) ||
 639         ($fileSize > 256 * 1024 * 1024) ||
 640         ($fileSize < 0)
 641       ) {
 642         rename($fileName,
 643           $fileName . '.' . date('Ymdhs', mktime(0, 0, 0, date("m") - 1, date("d"), date("Y")))
 644         );
 645       }
 646     }
 647
 648     return Log::singleton('file', $fileName);
 649   }
 650
 651   /**
 652    * @param string $msg
 653    * @param bool $log
 654    */
 655   static function backtrace($msg = 'backTrace', $log = FALSE) {
 656     $backTrace = debug_backtrace();
 657     $message = self::formatBacktrace($backTrace);
 658     if (!$log) {
 659       CRM_Core_Error::debug($msg, $message);
 660     }
 661     else {
 662       CRM_Core_Error::debug_var($msg, $message);
 663     }
 664   }
 665
 666   /**
 667    * Render a backtrace array as a string
 668    *
 669    * @param array $backTrace array of stack frames
 670    * @param boolean $showArgs TRUE if we should try to display content of function arguments (which could be sensitive); FALSE to display only the type of each function argument
 671    * @param int $maxArgLen maximum number of characters to show from each argument string
 672    * @return string printable plain-text
 673    */
 674   static function formatBacktrace($backTrace, $showArgs = TRUE, $maxArgLen = 80) {
 675     $message = '';
 676     foreach (self::parseBacktrace($backTrace, $showArgs, $maxArgLen) as $idx => $trace) {
 677       $message .= sprintf("#%s %s\n", $idx, $trace);
 678     }
 679     $message .= sprintf("#%s {main}\n", 1+$idx);
 680     return $message;
 681   }
 682
 683   /**
 684    * Render a backtrace array as an array
 685    *
 686    * @param array $backTrace array of stack frames
 687    * @param boolean $showArgs TRUE if we should try to display content of function arguments (which could be sensitive); FALSE to display only the type of each function argument
 688    * @param int $maxArgLen maximum number of characters to show from each argument string
 689    * @return array
 690    * @see debug_backtrace
 691    * @see Exception::getTrace()
 692    */
 693   static function parseBacktrace($backTrace, $showArgs = TRUE, $maxArgLen = 80) {
 694     $ret = array();
 695     foreach ($backTrace as $trace) {
 696       $args = array();
 697       $fnName = CRM_Utils_Array::value('function', $trace);
 698       $className = isset($trace['class']) ? ($trace['class'] . $trace['type']) : '';
 699
 700       // do now show args for a few password related functions
 701       $skipArgs = ($className == 'DB::' && $fnName == 'connect') ? TRUE : FALSE;
 702
 703       foreach ($trace['args'] as $arg) {
 704         if (! $showArgs || $skipArgs) {
 705           $args[] = '(' . gettype($arg) . ')';
 706           continue;
 707         }
 708         switch ($type = gettype($arg)) {
 709           case 'boolean':
 710             $args[] = $arg ? 'TRUE' : 'FALSE';
 711             break;
 712           case 'integer':
 713           case 'double':
 714             $args[] = $arg;
 715             break;
 716           case 'string':
 717             $args[] = '"' . CRM_Utils_String::ellipsify(addcslashes((string) $arg, "\r\n\t\""), $maxArgLen). '"';
 718             break;
 719           case 'array':
 720             $args[] = '(Array:'.count($arg).')';
 721             break;
 722           case 'object':
 723             $args[] = 'Object(' . get_class($arg) . ')';
 724             break;
 725           case 'resource':
 726             $args[] = 'Resource';
 727             break;
 728           case 'NULL':
 729             $args[] = 'NULL';
 730             break;
 731           default:
 732             $args[] = "($type)";
 733             break;
 734         }
 735       }
 736
 737       $ret[] = sprintf(
 738         "%s(%s): %s%s(%s)",
 739         CRM_Utils_Array::value('file', $trace, '[internal function]'),
 740         CRM_Utils_Array::value('line', $trace, ''),
 741         $className,
 742         $fnName,
 743         implode(", ", $args)
 744       );
 745     }
 746     return $ret;
 747   }
 748
 749   /**
 750    * Render an exception as HTML string
 751    *
 752    * @param Exception $e
 753    * @return string printable HTML text
 754    */
 755   static function formatHtmlException(Exception $e) {
 756     $msg = '';
 757
 758     // Exception metadata
 759
 760     // Exception backtrace
 761     if ($e instanceof PEAR_Exception) {
 762       $ei = $e;
 763       while (is_callable(array($ei, 'getCause'))) {
 764         if ($ei->getCause() instanceof PEAR_Error) {
 765           $msg .= '<table class="crm-db-error">';
 766           $msg .= sprintf('<thead><tr><th>%s</th><th>%s</th></tr></thead>', ts('Error Field'), ts('Error Value'));
 767           $msg .= '<tbody>';
 768           foreach (array('Type', 'Code', 'Message', 'Mode', 'UserInfo', 'DebugInfo') as $f) {
 769             $msg .= sprintf('<tr><td>%s</td><td>%s</td></tr>', $f, call_user_func(array($ei->getCause(), "get$f")));
 770     }
 771           $msg .= '</tbody></table>';
 772     }
 773         $ei = $ei->getCause();
 774   }
 775       $msg .= $e->toHtml();
 776     } else {
 777       $msg .= '<p><b>' . get_class($e) . ': "' . htmlentities($e->getMessage()) . '"</b></p>';
 778       $msg .= '<pre>' . htmlentities(self::formatBacktrace($e->getTrace())) . '</pre>';
 779     }
 780     return $msg;
 781   }
 782
 783   /**
 784    * Write details of an exception to the log
 785    *
 786    * @param Exception $e
 787    * @return string printable plain text
 788    */
 789   static function formatTextException(Exception $e) {
 790     $msg = get_class($e) . ": \"" . $e->getMessage() . "\"\n";
 791
 792     $ei = $e;
 793     while (is_callable(array($ei, 'getCause'))) {
 794       if ($ei->getCause() instanceof PEAR_Error) {
 795         foreach (array('Type', 'Code', 'Message', 'Mode', 'UserInfo', 'DebugInfo') as $f) {
 796           $msg .= sprintf(" * ERROR %s: %s\n", strtoupper($f), call_user_func(array($ei->getCause(), "get$f")));
 797         }
 798       }
 799       $ei = $ei->getCause();
 800     }
 801     $msg .= self::formatBacktrace($e->getTrace());
 802     return $msg;
 803   }
 804
 805   /**
 806    * @param $message
 807    * @param int $code
 808    * @param string $level
 809    * @param null $params
 810    *
 811    * @return object
 812    */
 813   static function createError($message, $code = 8000, $level = 'Fatal', $params = NULL) {
 814     $error = CRM_Core_Error::singleton();
 815     $error->push($code, $level, array($params), $message);
 816     return $error;
 817   }
 818
 819   /**
 820    * Set a status message in the session, then bounce back to the referrer.
 821    *
 822    * @param string $status The status message to set
 823    *
 824    * @param null $redirect
 825    * @param string $title
 826    * @return void
 827    * @access public
 828    * @static
 829    */
 830   public static function statusBounce($status, $redirect = NULL, $title = NULL) {
 831     $session = CRM_Core_Session::singleton();
 832     if (!$redirect) {
 833       $redirect = $session->readUserContext();
 834     }
 835     if ($title === NULL) {
 836       $title = ts('Error');
 837     }
 838     $session->setStatus($status, $title, 'alert', array('expires' => 0));
 839     if (CRM_Utils_Array::value('snippet', $_REQUEST) === CRM_Core_Smarty::PRINT_JSON) {
 840       CRM_Core_Page_AJAX::returnJsonResponse(array('status' => 'error'));
 841     }
 842     CRM_Utils_System::redirect($redirect);
 843   }
 844
 845   /**
 846    * Function to reset the error stack
 847    *
 848    * @access public
 849    * @static
 850    */
 851   public static function reset() {
 852     $error = self::singleton();
 853     $error->_errors = array();
 854     $error->_errorsByLevel = array();
 855   }
 856
 857   /**
 858    * PEAR error-handler which converts errors to exceptions
 859    *
 860    * @param $pearError
 861    * @throws PEAR_Exception
 862    */
 863   public static function exceptionHandler($pearError) {
 864     CRM_Core_Error::backtrace('backTrace', TRUE);
 865     throw new PEAR_Exception($pearError->getMessage(), $pearError);
 866   }
 867
 868   /**
 869    * PEAR error-handler to quietly catch otherwise fatal errors. Intended for use with smtp transport.
 870    *
 871    * @param object $obj       The PEAR_ERROR object
 872    * @return object $obj
 873    * @access public
 874    * @static
 875    */
 876   public static function nullHandler($obj) {
 877     CRM_Core_Error::debug_log_message("Ignoring exception thrown by nullHandler: {$obj->code}, {$obj->message}");
 878     CRM_Core_Error::backtrace('backTrace', TRUE);
 879     return $obj;
 880   }
 881
 882   /*
 883    * @deprecated
 884    * This function is no longer used by v3 api.
 885    * @fixme Some core files call it but it should be re-thought & renamed or removed
 886    */
 887   /**
 888    * @param $msg
 889    * @param null $data
 890    *
 891    * @return array
 892    * @throws Exception
 893    */
 894   public static function &createAPIError($msg, $data = NULL) {
 895     if (self::$modeException) {
 896       throw new Exception($msg, $data);
 897     }
 898
 899     $values = array();
 900
 901     $values['is_error'] = 1;
 902     $values['error_message'] = $msg;
 903     if (isset($data)) {
 904       $values = array_merge($values, $data);
 905     }
 906     return $values;
 907   }
 908
 909   /**
 910    * @param $file
 911    */
 912   public static function movedSiteError($file) {
 913     $url = CRM_Utils_System::url('civicrm/admin/setting/updateConfigBackend',
 914       'reset=1',
 915       TRUE
 916     );
 917     echo "We could not write $file. Have you moved your site directory or server?<p>";
 918     echo "Please fix the setting by running the <a href=\"$url\">update config script</a>";
 919     exit();
 920   }
 921
 922   /**
 923    * Terminate execution abnormally
 924    */
 925   protected static function abend($code) {
 926     // do a hard rollback of any pending transactions
 927     // if we've come here, its because of some unexpected PEAR errors
 928     CRM_Core_Transaction::forceRollbackIfEnabled();
 929     CRM_Utils_System::civiExit($code);
 930   }
 931
 932   /**
 933    * @param $error
 934    * @param const $type
 935    *
 936    * @return bool
 937    */
 938   public static function isAPIError($error, $type = CRM_Core_Error::FATAL_ERROR) {
 939     if (is_array($error) && !empty($error['is_error'])) {
 940       $code = $error['error_message']['code'];
 941       if ($code == $type) {
 942         return TRUE;
 943       }
 944     }
 945     return FALSE;
 946   }
 947 }
 948
 949 $e = new PEAR_ErrorStack('CRM');
 950 $e->singleton('CRM', FALSE, NULL, 'CRM_Core_Error');