CRM/Core/Error.php

   1 <?php
   2 /*
   3  +--------------------------------------------------------------------+
   4  | Copyright CiviCRM LLC. All rights reserved.                        |
   5  |                                                                    |
   6  | This work is published under the GNU AGPLv3 license with some      |
   7  | permitted exceptions and without any warranty. For full license    |
   8  | and copyright information, see https://civicrm.org/licensing       |
   9  +--------------------------------------------------------------------+
  10  */
  11
  12 /**
  13  * Start of the Error framework. We should check out and inherit from
  14  * PEAR_ErrorStack and use that framework
  15  *
  16  * @package CRM
  17  * @copyright CiviCRM LLC https://civicrm.org/licensing
  18  */
  19
  20 require_once 'PEAR/ErrorStack.php';
  21 require_once 'PEAR/Exception.php';
  22 require_once 'CRM/Core/Exception.php';
  23
  24 require_once 'Log.php';
  25
  26 /**
  27  * Class CRM_Core_Error
  28  */
  29 class CRM_Core_Error extends PEAR_ErrorStack {
  30
  31   /**
  32    * Status code of various types of errors.
  33    */
  34   const FATAL_ERROR = 2;
  35   const DUPLICATE_CONTACT = 8001;
  36   const DUPLICATE_CONTRIBUTION = 8002;
  37   const DUPLICATE_PARTICIPANT = 8003;
  38
  39   /**
  40    * We only need one instance of this object. So we use the singleton
  41    * pattern and cache the instance in this variable
  42    * @var object
  43    */
  44   private static $_singleton = NULL;
  45
  46   /**
  47    * The logger object for this application.
  48    * @var object
  49    */
  50   private static $_log = NULL;
  51
  52   /**
  53    * If modeException == true, errors are raised as exception instead of returning civicrm_errors
  54    * @var bool
  55    */
  56   public static $modeException = NULL;
  57
  58   /**
  59    * Singleton function used to manage this object.
  60    *
  61    * @param null $package
  62    * @param bool $msgCallback
  63    * @param bool $contextCallback
  64    * @param bool $throwPEAR_Error
  65    * @param string $stackClass
  66    *
  67    * @return CRM_Core_Error
  68    */
  69   public static function &singleton($package = NULL, $msgCallback = FALSE, $contextCallback = FALSE, $throwPEAR_Error = FALSE, $stackClass = 'PEAR_ErrorStack') {
  70     if (self::$_singleton === NULL) {
  71       self::$_singleton = new CRM_Core_Error('CiviCRM');
  72     }
  73     return self::$_singleton;
  74   }
  75
  76   /**
  77    * Constructor.
  78    */
  79   public function __construct() {
  80     parent::__construct('CiviCRM');
  81
  82     $log = CRM_Core_Config::getLog();
  83     $this->setLogger($log);
  84
  85     // PEAR<=1.9.0 does not declare "static" properly.
  86     if (!is_callable(['PEAR', '__callStatic'])) {
  87       $this->setDefaultCallback([$this, 'handlePES']);
  88     }
  89     else {
  90       PEAR_ErrorStack::setDefaultCallback([$this, 'handlePES']);
  91     }
  92   }
  93
  94   /**
  95    * @param $error
  96    * @param string $separator
  97    *
  98    * @return array|null|string
  99    */
 100   public static function getMessages(&$error, $separator = '<br />') {
 101     if (is_a($error, 'CRM_Core_Error')) {
 102       $errors = $error->getErrors();
 103       $message = [];
 104       foreach ($errors as $e) {
 105         $message[] = $e['code'] . ': ' . $e['message'];
 106       }
 107       $message = implode($separator, $message);
 108       return $message;
 109     }
 110     elseif (is_a($error, 'Civi\Payment\Exception\PaymentProcessorException')) {
 111       return $error->getMessage();
 112     }
 113     return NULL;
 114   }
 115
 116   /**
 117    * Status display function specific to payment processor errors.
 118    * @param $error
 119    * @param string $separator
 120    */
 121   public static function displaySessionError(&$error, $separator = '<br />') {
 122     $message = self::getMessages($error, $separator);
 123     if ($message) {
 124       $status = ts("Payment Processor Error message") . "{$separator} $message";
 125       $session = CRM_Core_Session::singleton();
 126       $session->setStatus($status);
 127     }
 128   }
 129
 130   /**
 131    * Create the main callback method. this method centralizes error processing.
 132    *
 133    * the errors we expect are from the pear modules DB, DB_DataObject
 134    * which currently use PEAR::raiseError to notify of error messages.
 135    *
 136    * @param object $pearError PEAR_Error
 137    */
 138   public static function handle($pearError) {
 139     if (defined('CIVICRM_TEST')) {
 140       return self::simpleHandler($pearError);
 141     }
 142
 143     // setup smarty with config, session and template location.
 144     $template = CRM_Core_Smarty::singleton();
 145     $config = CRM_Core_Config::singleton();
 146
 147     if ($config->backtrace) {
 148       self::backtrace();
 149     }
 150
 151     // create the error array
 152     $error = self::getErrorDetails($pearError);
 153
 154     // We access connection info via _DB_DATAOBJECT instead
 155     // of, e.g., calling getDatabaseConnection(), so that we
 156     // can avoid infinite loops.
 157     global $_DB_DATAOBJECT;
 158
 159     if (isset($_DB_DATAOBJECT['CONFIG']['database'])) {
 160       $dao = new CRM_Core_DAO();
 161       if (isset($_DB_DATAOBJECT['CONNECTIONS'][$dao->_database_dsn_md5])) {
 162         $conn = $_DB_DATAOBJECT['CONNECTIONS'][$dao->_database_dsn_md5];
 163
 164         // FIXME: Polymorphism for the win.
 165         if ($conn instanceof DB_mysqli) {
 166           $link = $conn->connection;
 167           if (mysqli_error($link)) {
 168             $mysql_error = mysqli_error($link) . ', ' . mysqli_errno($link);
 169             // execute a dummy query to clear error stack
 170             mysqli_query($link, 'select 1');
 171           }
 172         }
 173         elseif ($conn instanceof DB_mysql) {
 174           if (mysql_error()) {
 175             $mysql_error = mysql_error() . ', ' . mysql_errno();
 176             // execute a dummy query to clear error stack
 177             mysql_query('select 1');
 178           }
 179         }
 180         else {
 181           $mysql_error = 'fixme-unknown-db-cxn';
 182         }
 183         $template->assign_by_ref('mysql_code', $mysql_error);
 184       }
 185     }
 186
 187     // Use the custom fatalErrorHandler if defined
 188     if ($config->fatalErrorHandler && function_exists($config->fatalErrorHandler)) {
 189       $name = $config->fatalErrorHandler;
 190       $vars = [
 191         'pearError' => $pearError,
 192       ];
 193       $ret = $name($vars);
 194       if ($ret) {
 195         // the call has been successfully handled so we just exit
 196         self::abend(CRM_Core_Error::FATAL_ERROR);
 197       }
 198     }
 199
 200     $template->assign_by_ref('error', $error);
 201     $errorDetails = CRM_Core_Error::debug('', $error, FALSE);
 202     $template->assign_by_ref('errorDetails', $errorDetails);
 203
 204     CRM_Core_Error::debug_var('Fatal Error Details', $error, TRUE, TRUE, '', PEAR_LOG_ERR);
 205     CRM_Core_Error::backtrace('backTrace', TRUE);
 206
 207     if ($config->initialized) {
 208       $content = $template->fetch('CRM/common/fatal.tpl');
 209       echo CRM_Utils_System::theme($content);
 210     }
 211     else {
 212       echo "Sorry. A non-recoverable error has occurred. The error trace below might help to resolve the issue<p>";
 213       CRM_Core_Error::debug(NULL, $error);
 214     }
 215     static $runOnce = FALSE;
 216     if ($runOnce) {
 217       exit;
 218     }
 219     $runOnce = TRUE;
 220     self::abend(CRM_Core_Error::FATAL_ERROR);
 221   }
 222
 223   /**
 224    * this function is used to trap and print errors
 225    * during system initialization time. Hence the error
 226    * message is quite ugly
 227    *
 228    * @param $pearError
 229    */
 230   public static function simpleHandler($pearError) {
 231
 232     $error = self::getErrorDetails($pearError);
 233
 234     // ensure that debug does not check permissions since we are in bootstrap
 235     // mode and need to print a decent message to help the user
 236     CRM_Core_Error::debug('Initialization Error', $error, TRUE, TRUE, FALSE);
 237
 238     // always log the backtrace to a file
 239     self::backtrace('backTrace', TRUE);
 240
 241     exit(0);
 242   }
 243
 244   /**
 245    * this function is used to return error details
 246    *
 247    * @param $pearError
 248    *
 249    * @return array $error
 250    */
 251   public static function getErrorDetails($pearError) {
 252     // create the error array
 253     $error = [];
 254     $error['callback'] = $pearError->getCallback();
 255     $error['code'] = $pearError->getCode();
 256     $error['message'] = $pearError->getMessage();
 257     $error['mode'] = $pearError->getMode();
 258     $error['debug_info'] = $pearError->getDebugInfo();
 259     $error['type'] = $pearError->getType();
 260     $error['user_info'] = $pearError->getUserInfo();
 261     $error['to_string'] = $pearError->toString();
 262
 263     return $error;
 264   }
 265
 266   /**
 267    * Handle errors raised using the PEAR Error Stack.
 268    *
 269    * currently the handler just requests the PES framework
 270    * to push the error to the stack (return value PEAR_ERRORSTACK_PUSH).
 271    *
 272    * Note: we can do our own error handling here and return PEAR_ERRORSTACK_IGNORE.
 273    *
 274    * Also, if we do not return any value the PEAR_ErrorStack::push() then does the
 275    * action of PEAR_ERRORSTACK_PUSHANDLOG which displays the errors on the screen,
 276    * since the logger set for this error stack is 'display' - see CRM_Core_Config::getLog();
 277    *
 278    * @param mixed $pearError
 279    *
 280    * @return int
 281    */
 282   public static function handlePES($pearError) {
 283     return PEAR_ERRORSTACK_PUSH;
 284   }
 285
 286   /**
 287    * Display an error page with an error message describing what happened.
 288    *
 289    * @deprecated
 290    *  This is a really annoying function. We ❤ exceptions. Be exceptional!
 291    *
 292    * @see CRM-20181
 293    *
 294    * @param string $message
 295    *   The error message.
 296    * @param string $code
 297    *   The error code if any.
 298    * @param string $email
 299    *   The email address to notify of this situation.
 300    *
 301    * @throws Exception
 302    */
 303   public static function fatal($message = NULL, $code = NULL, $email = NULL) {
 304     CRM_Core_Error::deprecatedFunctionWarning('throw new CRM_Core_Exception or use CRM_Core_Error::statusBounce', 'CRM_Core_Error::fatal');
 305     $vars = [
 306       'message' => $message,
 307       'code' => $code,
 308     ];
 309
 310     if (self::$modeException) {
 311       // CRM-11043
 312       CRM_Core_Error::debug_var('Fatal Error Details', $vars, TRUE, TRUE, '', PEAR_LOG_ERR);
 313       CRM_Core_Error::backtrace('backTrace', TRUE);
 314
 315       $details = 'A fatal error was triggered';
 316       if ($message) {
 317         $details .= ': ' . $message;
 318       }
 319       throw new Exception($details, $code);
 320     }
 321
 322     if (!$message) {
 323       $message = ts('We experienced an unexpected error. You may have found a bug. For more information on how to provide a bug report, please read: %1', [1 => 'https://civicrm.org/bug-reporting']);
 324     }
 325
 326     if (php_sapi_name() == "cli") {
 327       print ("Sorry. A non-recoverable error has occurred.\n$message \n$code\n$email\n\n");
 328       // Fix for CRM-16899
 329       echo static::formatBacktrace(debug_backtrace());
 330       die("\n");
 331       // FIXME: Why doesn't this call abend()?
 332       // Difference: abend() will cleanup transaction and (via civiExit) store session state
 333       // self::abend(CRM_Core_Error::FATAL_ERROR);
 334     }
 335
 336     $config = CRM_Core_Config::singleton();
 337
 338     if ($config->fatalErrorHandler &&
 339       function_exists($config->fatalErrorHandler)
 340     ) {
 341       $name = $config->fatalErrorHandler;
 342       $ret = $name($vars);
 343       if ($ret) {
 344         // the call has been successfully handled
 345         // so we just exit
 346         self::abend(CRM_Core_Error::FATAL_ERROR);
 347       }
 348     }
 349
 350     if ($config->backtrace) {
 351       self::backtrace();
 352     }
 353
 354     CRM_Core_Error::debug_var('Fatal Error Details', $vars, TRUE, TRUE, '', PEAR_LOG_ERR);
 355     CRM_Core_Error::backtrace('backTrace', TRUE);
 356
 357     // If we are in an ajax callback, format output appropriately
 358     if (CRM_Utils_Array::value('snippet', $_REQUEST) === CRM_Core_Smarty::PRINT_JSON) {
 359       $out = [
 360         'status' => 'fatal',
 361         'content' => '<div class="messages status no-popup"><div class="icon inform-icon"></div>' . ts('Sorry but we are not able to provide this at the moment.') . '</div>',
 362       ];
 363       if ($config->backtrace && CRM_Core_Permission::check('view debug output')) {
 364         $out['backtrace'] = self::parseBacktrace(debug_backtrace());
 365         $message .= '<p><em>See console for backtrace</em></p>';
 366       }
 367       CRM_Core_Session::setStatus($message, ts('Sorry an error occurred'), 'error');
 368       CRM_Core_Transaction::forceRollbackIfEnabled();
 369       CRM_Core_Page_AJAX::returnJsonResponse($out);
 370     }
 371
 372     $template = CRM_Core_Smarty::singleton();
 373     $template->assign($vars);
 374     $config->userSystem->outputError($template->fetch('CRM/common/fatal.tpl'));
 375
 376     self::abend(CRM_Core_Error::FATAL_ERROR);
 377   }
 378
 379   /**
 380    * Display an error page with an error message describing what happened.
 381    *
 382    * This function is evil -- it largely replicates fatal(). Hopefully the
 383    * entire CRM_Core_Error system can be hollowed out and replaced with
 384    * something that follows a cleaner separation of concerns.
 385    *
 386    * @param Exception $exception
 387    */
 388   public static function handleUnhandledException($exception) {
 389     try {
 390       CRM_Utils_Hook::unhandledException($exception);
 391     }
 392     catch (Exception $other) {
 393       // if the exception-handler generates an exception, then that sucks! oh, well. carry on.
 394       CRM_Core_Error::debug_var('handleUnhandledException_nestedException', self::formatTextException($other), TRUE, TRUE, '', PEAR_LOG_ERR);
 395     }
 396     $config = CRM_Core_Config::singleton();
 397     $vars = [
 398       'message' => $exception->getMessage(),
 399       'code' => NULL,
 400       'exception' => $exception,
 401     ];
 402     if (!$vars['message']) {
 403       $vars['message'] = ts('We experienced an unexpected error. You may have found a bug. For more information on how to provide a bug report, please read: %1', [1 => 'https://civicrm.org/bug-reporting']);
 404     }
 405
 406     // Case A: CLI
 407     if (php_sapi_name() == "cli") {
 408       printf("Sorry. A non-recoverable error has occurred.\n%s\n", $vars['message']);
 409       print self::formatTextException($exception);
 410       die("\n");
 411       // FIXME: Why doesn't this call abend()?
 412       // Difference: abend() will cleanup transaction and (via civiExit) store session state
 413       // self::abend(CRM_Core_Error::FATAL_ERROR);
 414     }
 415
 416     // Case B: Custom error handler
 417     if ($config->fatalErrorHandler &&
 418       function_exists($config->fatalErrorHandler)
 419     ) {
 420       $name = $config->fatalErrorHandler;
 421       $ret = $name($vars);
 422       if ($ret) {
 423         // the call has been successfully handled
 424         // so we just exit
 425         self::abend(CRM_Core_Error::FATAL_ERROR);
 426       }
 427     }
 428
 429     // Case C: Default error handler
 430
 431     // log to file
 432     CRM_Core_Error::debug_var('Fatal Error Details', $vars, FALSE, TRUE, '', PEAR_LOG_ERR);
 433     CRM_Core_Error::backtrace('backTrace', TRUE);
 434
 435     // print to screen
 436     $template = CRM_Core_Smarty::singleton();
 437     $template->assign($vars);
 438     $content = $template->fetch('CRM/common/fatal.tpl');
 439
 440     if ($config->backtrace) {
 441       $content = self::formatHtmlException($exception) . $content;
 442     }
 443
 444     echo CRM_Utils_System::theme($content);
 445
 446     // fin
 447     self::abend(CRM_Core_Error::FATAL_ERROR);
 448   }
 449
 450   /**
 451    * Outputs pre-formatted debug information. Flushes the buffers
 452    * so we can interrupt a potential POST/redirect
 453    *
 454    * @param string $name name of debug section
 455    * @param $variable mixed reference to variables that we need a trace of
 456    * @param bool $log should we log or return the output
 457    * @param bool $html whether to generate a HTML-escaped output
 458    * @param bool $checkPermission should we check permissions before displaying output
 459    *                useful when we die during initialization and permissioning
 460    *                subsystem is not initialized - CRM-13765
 461    *
 462    * @return string
 463    *   the generated output
 464    */
 465   public static function debug($name, $variable = NULL, $log = TRUE, $html = TRUE, $checkPermission = TRUE) {
 466     $error = self::singleton();
 467
 468     if ($variable === NULL) {
 469       $variable = $name;
 470       $name = NULL;
 471     }
 472
 473     $out = print_r($variable, TRUE);
 474     $prefix = NULL;
 475     if ($html) {
 476       $out = htmlspecialchars($out);
 477       if ($name) {
 478         $prefix = "<p>$name</p>";
 479       }
 480       $out = "{$prefix}<p><pre>$out</pre></p><p></p>";
 481     }
 482     else {
 483       if ($name) {
 484         $prefix = "$name:\n";
 485       }
 486       $out = "{$prefix}$out\n";
 487     }
 488     if (
 489       $log &&
 490       (!$checkPermission || CRM_Core_Permission::check('view debug output'))
 491     ) {
 492       echo $out;
 493     }
 494
 495     return $out;
 496   }
 497
 498   /**
 499    * Similar to the function debug. Only difference is
 500    * in the formatting of the output.
 501    *
 502    * @param string $variable_name
 503    *   Variable name.
 504    * @param mixed $variable
 505    *   Variable value.
 506    * @param bool $print
 507    *   Use print_r (if true) or var_dump (if false).
 508    * @param bool $log
 509    *   Log or return the output?
 510    * @param string $prefix
 511    *   Prefix for output logfile.
 512    * @param int $priority
 513    *   The log priority level.
 514    *
 515    * @return string
 516    *   The generated output
 517    *
 518    * @see CRM_Core_Error::debug()
 519    * @see CRM_Core_Error::debug_log_message()
 520    */
 521   public static function debug_var($variable_name, $variable, $print = TRUE, $log = TRUE, $prefix = '', $priority = NULL) {
 522     // check if variable is set
 523     if (!isset($variable)) {
 524       $out = "\$$variable_name is not set";
 525     }
 526     else {
 527       if ($print) {
 528         $out = print_r($variable, TRUE);
 529         $out = "\$$variable_name = $out";
 530       }
 531       else {
 532         // use var_dump
 533         ob_start();
 534         var_dump($variable);
 535         $dump = ob_get_contents();
 536         ob_end_clean();
 537         $out = "\n\$$variable_name = $dump";
 538       }
 539       // reset if it is an array
 540       if (is_array($variable)) {
 541         reset($variable);
 542       }
 543     }
 544     return self::debug_log_message($out, FALSE, $prefix, $priority);
 545   }
 546
 547   /**
 548    * Display the error message on terminal and append it to the log file.
 549    *
 550    * Provided the user has the 'view debug output' the output should be displayed. In all
 551    * cases it should be logged.
 552    *
 553    * @param string $message
 554    * @param bool $out
 555    *   Should we log or return the output.
 556    *
 557    * @param string $prefix
 558    *   Message prefix.
 559    * @param string $priority
 560    *
 561    * @return string
 562    *   Format of the backtrace
 563    */
 564   public static function debug_log_message($message, $out = FALSE, $prefix = '', $priority = NULL) {
 565     $config = CRM_Core_Config::singleton();
 566
 567     $file_log = self::createDebugLogger($prefix);
 568     $file_log->log("$message\n", $priority);
 569
 570     $str = '<p/><code>' . htmlspecialchars($message) . '</code>';
 571     if ($out && CRM_Core_Permission::check('view debug output')) {
 572       echo $str;
 573     }
 574     $file_log->close();
 575
 576     // Use the custom fatalErrorHandler if defined
 577     if (in_array($priority, [PEAR_LOG_EMERG, PEAR_LOG_ALERT, PEAR_LOG_CRIT, PEAR_LOG_ERR])) {
 578       if ($config->fatalErrorHandler && function_exists($config->fatalErrorHandler)) {
 579         $name = $config->fatalErrorHandler;
 580         $vars = [
 581           'debugLogMessage' => $message,
 582           'priority' => $priority,
 583         ];
 584         $name($vars);
 585       }
 586     }
 587
 588     if (!isset(\Civi::$statics[__CLASS__]['userFrameworkLogging'])) {
 589       // Set it to FALSE first & then try to set it. This is to prevent a loop as calling
 590       // $config->userFrameworkLogging can trigger DB queries & under log mode this
 591       // then gets called again.
 592       \Civi::$statics[__CLASS__]['userFrameworkLogging'] = FALSE;
 593       \Civi::$statics[__CLASS__]['userFrameworkLogging'] = $config->userFrameworkLogging;
 594     }
 595
 596     if (!empty(\Civi::$statics[__CLASS__]['userFrameworkLogging'])) {
 597       // should call $config->userSystem->logger($message) here - but I got a situation where userSystem was not an object - not sure why
 598       if ($config->userSystem->is_drupal and function_exists('watchdog')) {
 599         watchdog('civicrm', '%message', ['%message' => $message], $priority ?? WATCHDOG_DEBUG);
 600       }
 601     }
 602
 603     return $str;
 604   }
 605
 606   /**
 607    * Append to the query log (if enabled)
 608    *
 609    * @param string $string
 610    */
 611   public static function debug_query($string) {
 612     if (defined('CIVICRM_DEBUG_LOG_QUERY')) {
 613       if (CIVICRM_DEBUG_LOG_QUERY === 'backtrace') {
 614         CRM_Core_Error::backtrace($string, TRUE);
 615       }
 616       elseif (CIVICRM_DEBUG_LOG_QUERY) {
 617         CRM_Core_Error::debug_var('Query', $string, TRUE, TRUE, 'sql_log', PEAR_LOG_DEBUG);
 618       }
 619     }
 620   }
 621
 622   /**
 623    * Execute a query and log the results.
 624    *
 625    * @param string $query
 626    */
 627   public static function debug_query_result($query) {
 628     $results = CRM_Core_DAO::executeQuery($query)->fetchAll();
 629     CRM_Core_Error::debug_var('dao result', ['query' => $query, 'results' => $results], TRUE, TRUE, '', PEAR_LOG_DEBUG);
 630   }
 631
 632   /**
 633    * Obtain a reference to the error log.
 634    *
 635    * @param string $prefix
 636    *
 637    * @return Log_file
 638    */
 639   public static function createDebugLogger($prefix = '') {
 640     self::generateLogFileName($prefix);
 641     return Log::singleton('file', \Civi::$statics[__CLASS__]['logger_file' . $prefix], '');
 642   }
 643
 644   /**
 645    * Generate a hash for the logfile.
 646    *
 647    * CRM-13640.
 648    *
 649    * @param CRM_Core_Config $config
 650    *
 651    * @return string
 652    */
 653   public static function generateLogFileHash($config) {
 654     // Use multiple (but stable) inputs for hash information.
 655     $md5inputs = [
 656       defined('CIVICRM_SITE_KEY') ? CIVICRM_SITE_KEY : 'NO_SITE_KEY',
 657       $config->userFrameworkBaseURL,
 658       md5($config->dsn),
 659       $config->dsn,
 660     ];
 661     // Trim 8 chars off the string, make it slightly easier to find
 662     // but reveals less information from the hash.
 663     return substr(md5(var_export($md5inputs, 1)), 8);
 664   }
 665
 666   /**
 667    * Generate the name of the logfile to use and store it as a static.
 668    *
 669    * This function includes simplistic log rotation and a check as to whether
 670    * the file exists.
 671    *
 672    * @param string $prefix
 673    */
 674   protected static function generateLogFileName($prefix) {
 675     if (!isset(\Civi::$statics[__CLASS__]['logger_file' . $prefix])) {
 676       $config = CRM_Core_Config::singleton();
 677
 678       $prefixString = $prefix ? ($prefix . '.') : '';
 679
 680       if (CRM_Utils_Constant::value('CIVICRM_LOG_HASH', TRUE)) {
 681         $hash = self::generateLogFileHash($config) . '.';
 682       }
 683       else {
 684         $hash = '';
 685       }
 686       $fileName = $config->configAndLogDir . 'CiviCRM.' . $prefixString . $hash . 'log';
 687
 688       // Roll log file monthly or if greater than our threshold.
 689       // Size-based rotation introduced in response to filesize limits on
 690       // certain OS/PHP combos.
 691       $maxBytes = CRM_Utils_Constant::value('CIVICRM_LOG_ROTATESIZE', 256 * 1024 * 1024);
 692       if ($maxBytes) {
 693         if (file_exists($fileName)) {
 694           $fileTime = date("Ym", filemtime($fileName));
 695           $fileSize = filesize($fileName);
 696           if (($fileTime < date('Ym')) ||
 697             ($fileSize > $maxBytes) ||
 698             ($fileSize < 0)
 699           ) {
 700             rename($fileName,
 701               $fileName . '.' . date('YmdHi')
 702             );
 703           }
 704         }
 705       }
 706       \Civi::$statics[__CLASS__]['logger_file' . $prefix] = $fileName;
 707     }
 708   }
 709
 710   /**
 711    * @param string $msg
 712    * @param bool $log
 713    */
 714   public static function backtrace($msg = 'backTrace', $log = FALSE) {
 715     $backTrace = debug_backtrace();
 716     $message = self::formatBacktrace($backTrace);
 717     if (!$log) {
 718       CRM_Core_Error::debug($msg, $message);
 719     }
 720     else {
 721       CRM_Core_Error::debug_var($msg, $message, TRUE, TRUE, '', PEAR_LOG_DEBUG);
 722     }
 723   }
 724
 725   /**
 726    * Render a backtrace array as a string.
 727    *
 728    * @param array $backTrace
 729    *   Array of stack frames.
 730    * @param bool $showArgs
 731    *   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.
 732    * @param int $maxArgLen
 733    *   Maximum number of characters to show from each argument string.
 734    * @return string
 735    *   printable plain-text
 736    */
 737   public static function formatBacktrace($backTrace, $showArgs = TRUE, $maxArgLen = 80) {
 738     $message = '';
 739     foreach (self::parseBacktrace($backTrace, $showArgs, $maxArgLen) as $idx => $trace) {
 740       $message .= sprintf("#%s %s\n", $idx, $trace);
 741     }
 742     $message .= sprintf("#%s {main}\n", 1 + $idx);
 743     return $message;
 744   }
 745
 746   /**
 747    * Render a backtrace array as an array.
 748    *
 749    * @param array $backTrace
 750    *   Array of stack frames.
 751    * @param bool $showArgs
 752    *   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.
 753    * @param int $maxArgLen
 754    *   Maximum number of characters to show from each argument string.
 755    * @return array
 756    * @see debug_backtrace
 757    * @see Exception::getTrace()
 758    */
 759   public static function parseBacktrace($backTrace, $showArgs = TRUE, $maxArgLen = 80) {
 760     $ret = [];
 761     foreach ($backTrace as $trace) {
 762       $args = [];
 763       $fnName = $trace['function'] ?? NULL;
 764       $className = isset($trace['class']) ? ($trace['class'] . $trace['type']) : '';
 765
 766       // Do not show args for a few password related functions
 767       $skipArgs = $className == 'DB::' && $fnName == 'connect';
 768
 769       if (!empty($trace['args'])) {
 770         foreach ($trace['args'] as $arg) {
 771           if (!$showArgs || $skipArgs) {
 772             $args[] = '(' . gettype($arg) . ')';
 773             continue;
 774           }
 775           switch ($type = gettype($arg)) {
 776             case 'boolean':
 777               $args[] = $arg ? 'TRUE' : 'FALSE';
 778               break;
 779
 780             case 'integer':
 781             case 'double':
 782               $args[] = $arg;
 783               break;
 784
 785             case 'string':
 786               $args[] = '"' . CRM_Utils_String::ellipsify(addcslashes((string) $arg, "\r\n\t\""), $maxArgLen) . '"';
 787               break;
 788
 789             case 'array':
 790               $args[] = '(Array:' . count($arg) . ')';
 791               break;
 792
 793             case 'object':
 794               $args[] = 'Object(' . get_class($arg) . ')';
 795               break;
 796
 797             case 'resource':
 798               $args[] = 'Resource';
 799               break;
 800
 801             case 'NULL':
 802               $args[] = 'NULL';
 803               break;
 804
 805             default:
 806               $args[] = "($type)";
 807               break;
 808           }
 809         }
 810       }
 811
 812       $ret[] = sprintf(
 813         "%s(%s): %s%s(%s)",
 814         CRM_Utils_Array::value('file', $trace, '[internal function]'),
 815         CRM_Utils_Array::value('line', $trace, ''),
 816         $className,
 817         $fnName,
 818         implode(", ", $args)
 819       );
 820     }
 821     return $ret;
 822   }
 823
 824   /**
 825    * Render an exception as HTML string.
 826    *
 827    * @param Exception $e
 828    * @return string
 829    *   printable HTML text
 830    */
 831   public static function formatHtmlException(Exception $e) {
 832     $msg = '';
 833
 834     // Exception metadata
 835
 836     // Exception backtrace
 837     if ($e instanceof PEAR_Exception) {
 838       $ei = $e;
 839       while (is_callable([$ei, 'getCause'])) {
 840         // DB_ERROR doesn't have a getCause but does have a __call function which tricks is_callable.
 841         if (!$ei instanceof DB_Error) {
 842           if ($ei->getCause() instanceof PEAR_Error) {
 843             $msg .= '<table class="crm-db-error">';
 844             $msg .= sprintf('<thead><tr><th>%s</th><th>%s</th></tr></thead>', ts('Error Field'), ts('Error Value'));
 845             $msg .= '<tbody>';
 846             foreach (['Type', 'Code', 'Message', 'Mode', 'UserInfo', 'DebugInfo'] as $f) {
 847               $msg .= sprintf('<tr><td>%s</td><td>%s</td></tr>', $f, call_user_func([$ei->getCause(), "get$f"]));
 848             }
 849             $msg .= '</tbody></table>';
 850           }
 851           $ei = $ei->getCause();
 852         }
 853       }
 854       $msg .= $e->toHtml();
 855     }
 856     else {
 857       $msg .= '<p><b>' . get_class($e) . ': "' . htmlentities($e->getMessage()) . '"</b></p>';
 858       $msg .= '<pre>' . htmlentities(self::formatBacktrace($e->getTrace())) . '</pre>';
 859     }
 860     return $msg;
 861   }
 862
 863   /**
 864    * Write details of an exception to the log.
 865    *
 866    * @param Exception $e
 867    * @return string
 868    *   printable plain text
 869    */
 870   public static function formatTextException(Exception $e) {
 871     $msg = get_class($e) . ": \"" . $e->getMessage() . "\"\n";
 872
 873     $ei = $e;
 874     while (is_callable([$ei, 'getCause'])) {
 875       // DB_ERROR doesn't have a getCause but does have a __call function which tricks is_callable.
 876       if (!$ei instanceof DB_Error) {
 877         if ($ei->getCause() instanceof PEAR_Error) {
 878           foreach (['Type', 'Code', 'Message', 'Mode', 'UserInfo', 'DebugInfo'] as $f) {
 879             $msg .= sprintf(" * ERROR %s: %s\n", strtoupper($f), call_user_func([$ei->getCause(), "get$f"]));
 880           }
 881         }
 882         $ei = $ei->getCause();
 883       }
 884       // if we have reached a DB_Error assume that is the end of the road.
 885       else {
 886         $ei = NULL;
 887       }
 888     }
 889     $msg .= self::formatBacktrace($e->getTrace());
 890     return $msg;
 891   }
 892
 893   /**
 894    * @param $message
 895    * @param int $code
 896    * @param string $level
 897    * @param array $params
 898    *
 899    * @return object
 900    */
 901   public static function createError($message, $code = 8000, $level = 'Fatal', $params = NULL) {
 902     $error = CRM_Core_Error::singleton();
 903     $error->push($code, $level, [$params], $message);
 904     return $error;
 905   }
 906
 907   /**
 908    * Set a status message in the session, then bounce back to the referrer.
 909    *
 910    * @param string $status
 911    *   The status message to set.
 912    *
 913    * @param null $redirect
 914    * @param string $title
 915    */
 916   public static function statusBounce($status, $redirect = NULL, $title = NULL) {
 917     $session = CRM_Core_Session::singleton();
 918     if (!$redirect) {
 919       $redirect = $session->readUserContext();
 920     }
 921     if ($title === NULL) {
 922       $title = ts('Error');
 923     }
 924     $session->setStatus($status, $title, 'alert', ['expires' => 0]);
 925     if (CRM_Utils_Array::value('snippet', $_REQUEST) === CRM_Core_Smarty::PRINT_JSON) {
 926       CRM_Core_Page_AJAX::returnJsonResponse(['status' => 'error']);
 927     }
 928     CRM_Utils_System::redirect($redirect);
 929   }
 930
 931   /**
 932    * Reset the error stack.
 933    *
 934    */
 935   public static function reset() {
 936     $error = self::singleton();
 937     $error->_errors = [];
 938     $error->_errorsByLevel = [];
 939   }
 940
 941   /**
 942    * PEAR error-handler which converts errors to exceptions
 943    *
 944    * @param $pearError
 945    * @throws PEAR_Exception
 946    */
 947   public static function exceptionHandler($pearError) {
 948     CRM_Core_Error::debug_var('Fatal Error Details', self::getErrorDetails($pearError), TRUE, TRUE, '', PEAR_LOG_ERR);
 949     CRM_Core_Error::backtrace('backTrace', TRUE);
 950     throw new PEAR_Exception($pearError->getMessage(), $pearError);
 951   }
 952
 953   /**
 954    * PEAR error-handler to quietly catch otherwise fatal errors. Intended for use with smtp transport.
 955    *
 956    * @param object $obj
 957    *   The PEAR_ERROR object.
 958    * @return object
 959    *   $obj
 960    */
 961   public static function nullHandler($obj) {
 962     CRM_Core_Error::debug_log_message("Ignoring exception thrown by nullHandler: {$obj->code}, {$obj->message}", FALSE, '', PEAR_LOG_ERR);
 963     CRM_Core_Error::backtrace('backTrace', TRUE);
 964     return $obj;
 965   }
 966
 967   /**
 968    * @deprecated
 969    * This function is no longer used by v3 api.
 970    * @fixme Some core files call it but it should be re-thought & renamed or removed
 971    *
 972    * @param $msg
 973    * @param null $data
 974    *
 975    * @return array
 976    * @throws Exception
 977    */
 978   public static function &createAPIError($msg, $data = NULL) {
 979     if (self::$modeException) {
 980       throw new Exception($msg, $data);
 981     }
 982
 983     $values = [];
 984
 985     $values['is_error'] = 1;
 986     $values['error_message'] = $msg;
 987     if (isset($data)) {
 988       $values = array_merge($values, $data);
 989     }
 990     return $values;
 991   }
 992
 993   /**
 994    * @param $file
 995    */
 996   public static function movedSiteError($file) {
 997     $url = CRM_Utils_System::url('civicrm/admin/setting/updateConfigBackend',
 998       'reset=1',
 999       TRUE
1000     );
1001     echo "We could not write $file. Have you moved your site directory or server?<p>";
1002     echo "Please fix the setting by running the <a href=\"$url\">update config script</a>";
1003     exit();
1004   }
1005
1006   /**
1007    * Terminate execution abnormally.
1008    *
1009    * @param string $code
1010    */
1011   protected static function abend($code) {
1012     // do a hard rollback of any pending transactions
1013     // if we've come here, its because of some unexpected PEAR errors
1014     CRM_Core_Transaction::forceRollbackIfEnabled();
1015     CRM_Utils_System::civiExit($code);
1016   }
1017
1018   /**
1019    * @param array $error
1020    * @param int $type
1021    *
1022    * @return bool
1023    */
1024   public static function isAPIError($error, $type = CRM_Core_Error::FATAL_ERROR) {
1025     if (is_array($error) && !empty($error['is_error'])) {
1026       $code = $error['error_message']['code'];
1027       if ($code == $type) {
1028         return TRUE;
1029       }
1030     }
1031     return FALSE;
1032   }
1033
1034   /**
1035    * Output a deprecated function warning to log file.  Deprecated class:function is automatically generated from calling function.
1036    *
1037    * @param string $newMethod
1038    *   description of new method (eg. "buildOptions() method in the appropriate BAO object").
1039    * @param string $oldMethod
1040    *   optional description of old method (if not the calling method). eg. CRM_MyClass::myOldMethodToGetTheOptions()
1041    */
1042   public static function deprecatedFunctionWarning($newMethod, $oldMethod = NULL) {
1043     if (!$oldMethod) {
1044       $dbt = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 2);
1045       $callerFunction = $dbt[1]['function'] ?? NULL;
1046       $callerClass = $dbt[1]['class'] ?? NULL;
1047       $oldMethod = "{$callerClass}::{$callerFunction}";
1048     }
1049     Civi::log()->warning("Deprecated function $oldMethod, use $newMethod.", ['civi.tag' => 'deprecated']);
1050   }
1051
1052 }
1053
1054 $e = new PEAR_ErrorStack('CRM');
1055 $e->singleton('CRM', FALSE, NULL, 'CRM_Core_Error');