1: <?php
  2: /**
  3:  * Framework debugging and PHP error-handling class
  4:  *
  5:  * Provides enhanced logging, stack traces, and rendering debug views
  6:  *
  7:  * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
  8:  * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
  9:  *
 10:  * Licensed under The MIT License
 11:  * For full copyright and license information, please see the LICENSE.txt
 12:  * Redistributions of files must retain the above copyright notice.
 13:  *
 14:  * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 15:  * @link          http://cakephp.org CakePHP(tm) Project
 16:  * @package       Cake.Utility
 17:  * @since         CakePHP(tm) v 1.2.4560
 18:  * @license       http://www.opensource.org/licenses/mit-license.php MIT License
 19:  */
 20: 
 21: App::uses('CakeLog', 'Log');
 22: App::uses('String', 'Utility');
 23: 
 24: /**
 25:  * Provide custom logging and error handling.
 26:  *
 27:  * Debugger overrides PHP's default error handling to provide stack traces and enhanced logging
 28:  *
 29:  * @package       Cake.Utility
 30:  * @link          http://book.cakephp.org/2.0/en/development/debugging.html#debugger-class
 31:  */
 32: class Debugger {
 33: 
 34: /**
 35:  * A list of errors generated by the application.
 36:  *
 37:  * @var array
 38:  */
 39:     public $errors = array();
 40: 
 41: /**
 42:  * The current output format.
 43:  *
 44:  * @var string
 45:  */
 46:     protected $_outputFormat = 'js';
 47: 
 48: /**
 49:  * Templates used when generating trace or error strings. Can be global or indexed by the format
 50:  * value used in $_outputFormat.
 51:  *
 52:  * @var string
 53:  */
 54:     protected $_templates = array(
 55:         'log' => array(
 56:             'trace' => '{:reference} - {:path}, line {:line}',
 57:             'error' => "{:error} ({:code}): {:description} in [{:file}, line {:line}]"
 58:         ),
 59:         'js' => array(
 60:             'error' => '',
 61:             'info' => '',
 62:             'trace' => '<pre class="stack-trace">{:trace}</pre>',
 63:             'code' => '',
 64:             'context' => '',
 65:             'links' => array(),
 66:             'escapeContext' => true,
 67:         ),
 68:         'html' => array(
 69:             'trace' => '<pre class="cake-error trace"><b>Trace</b> <p>{:trace}</p></pre>',
 70:             'context' => '<pre class="cake-error context"><b>Context</b> <p>{:context}</p></pre>',
 71:             'escapeContext' => true,
 72:         ),
 73:         'txt' => array(
 74:             'error' => "{:error}: {:code} :: {:description} on line {:line} of {:path}\n{:info}",
 75:             'code' => '',
 76:             'info' => ''
 77:         ),
 78:         'base' => array(
 79:             'traceLine' => '{:reference} - {:path}, line {:line}',
 80:             'trace' => "Trace:\n{:trace}\n",
 81:             'context' => "Context:\n{:context}\n",
 82:         )
 83:     );
 84: 
 85: /**
 86:  * Holds current output data when outputFormat is false.
 87:  *
 88:  * @var string
 89:  */
 90:     protected $_data = array();
 91: 
 92: /**
 93:  * Constructor.
 94:  *
 95:  */
 96:     public function __construct() {
 97:         $docRef = ini_get('docref_root');
 98: 
 99:         if (empty($docRef) && function_exists('ini_set')) {
100:             ini_set('docref_root', 'http://php.net/');
101:         }
102:         if (!defined('E_RECOVERABLE_ERROR')) {
103:             define('E_RECOVERABLE_ERROR', 4096);
104:         }
105: 
106:         $e = '<pre class="cake-error">';
107:         $e .= '<a href="javascript:void(0);" onclick="document.getElementById(\'{:id}-trace\')';
108:         $e .= '.style.display = (document.getElementById(\'{:id}-trace\').style.display == ';
109:         $e .= '\'none\' ? \'\' : \'none\');"><b>{:error}</b> ({:code})</a>: {:description} ';
110:         $e .= '[<b>{:path}</b>, line <b>{:line}</b>]';
111: 
112:         $e .= '<div id="{:id}-trace" class="cake-stack-trace" style="display: none;">';
113:         $e .= '{:links}{:info}</div>';
114:         $e .= '</pre>';
115:         $this->_templates['js']['error'] = $e;
116: 
117:         $t = '<div id="{:id}-trace" class="cake-stack-trace" style="display: none;">';
118:         $t .= '{:context}{:code}{:trace}</div>';
119:         $this->_templates['js']['info'] = $t;
120: 
121:         $links = array();
122:         $link = '<a href="javascript:void(0);" onclick="document.getElementById(\'{:id}-code\')';
123:         $link .= '.style.display = (document.getElementById(\'{:id}-code\').style.display == ';
124:         $link .= '\'none\' ? \'\' : \'none\')">Code</a>';
125:         $links['code'] = $link;
126: 
127:         $link = '<a href="javascript:void(0);" onclick="document.getElementById(\'{:id}-context\')';
128:         $link .= '.style.display = (document.getElementById(\'{:id}-context\').style.display == ';
129:         $link .= '\'none\' ? \'\' : \'none\')">Context</a>';
130:         $links['context'] = $link;
131: 
132:         $this->_templates['js']['links'] = $links;
133: 
134:         $this->_templates['js']['context'] = '<pre id="{:id}-context" class="cake-context" ';
135:         $this->_templates['js']['context'] .= 'style="display: none;">{:context}</pre>';
136: 
137:         $this->_templates['js']['code'] = '<pre id="{:id}-code" class="cake-code-dump" ';
138:         $this->_templates['js']['code'] .= 'style="display: none;">{:code}</pre>';
139: 
140:         $e = '<pre class="cake-error"><b>{:error}</b> ({:code}) : {:description} ';
141:         $e .= '[<b>{:path}</b>, line <b>{:line}]</b></pre>';
142:         $this->_templates['html']['error'] = $e;
143: 
144:         $this->_templates['html']['context'] = '<pre class="cake-context"><b>Context</b> ';
145:         $this->_templates['html']['context'] .= '<p>{:context}</p></pre>';
146:     }
147: 
148: /**
149:  * Returns a reference to the Debugger singleton object instance.
150:  *
151:  * @param string $class
152:  * @return object
153:  */
154:     public static function getInstance($class = null) {
155:         static $instance = array();
156:         if (!empty($class)) {
157:             if (!$instance || strtolower($class) != strtolower(get_class($instance[0]))) {
158:                 $instance[0] = new $class();
159:             }
160:         }
161:         if (!$instance) {
162:             $instance[0] = new Debugger();
163:         }
164:         return $instance[0];
165:     }
166: 
167: /**
168:  * Recursively formats and outputs the contents of the supplied variable.
169:  *
170:  *
171:  * @param mixed $var the variable to dump
172:  * @return void
173:  * @see Debugger::exportVar()
174:  * @link http://book.cakephp.org/2.0/en/development/debugging.html#Debugger::dump
175:  */
176:     public static function dump($var) {
177:         pr(self::exportVar($var));
178:     }
179: 
180: /**
181:  * Creates an entry in the log file. The log entry will contain a stack trace from where it was called.
182:  * as well as export the variable using exportVar. By default the log is written to the debug log.
183:  *
184:  * @param mixed $var Variable or content to log
185:  * @param integer $level type of log to use. Defaults to LOG_DEBUG
186:  * @return void
187:  * @link http://book.cakephp.org/2.0/en/development/debugging.html#Debugger::log
188:  */
189:     public static function log($var, $level = LOG_DEBUG) {
190:         $source = self::trace(array('start' => 1)) . "\n";
191:         CakeLog::write($level, "\n" . $source . self::exportVar($var));
192:     }
193: 
194: /**
195:  * Overrides PHP's default error handling.
196:  *
197:  * @param integer $code Code of error
198:  * @param string $description Error description
199:  * @param string $file File on which error occurred
200:  * @param integer $line Line that triggered the error
201:  * @param array $context Context
202:  * @return boolean true if error was handled
203:  * @deprecated Will be removed in 3.0. This function is superseded by Debugger::outputError().
204:  */
205:     public static function showError($code, $description, $file = null, $line = null, $context = null) {
206:         $self = Debugger::getInstance();
207: 
208:         if (empty($file)) {
209:             $file = '[internal]';
210:         }
211:         if (empty($line)) {
212:             $line = '??';
213:         }
214: 
215:         $info = compact('code', 'description', 'file', 'line');
216:         if (!in_array($info, $self->errors)) {
217:             $self->errors[] = $info;
218:         } else {
219:             return;
220:         }
221: 
222:         switch ($code) {
223:             case E_PARSE:
224:             case E_ERROR:
225:             case E_CORE_ERROR:
226:             case E_COMPILE_ERROR:
227:             case E_USER_ERROR:
228:                 $error = 'Fatal Error';
229:                 $level = LOG_ERR;
230:                 break;
231:             case E_WARNING:
232:             case E_USER_WARNING:
233:             case E_COMPILE_WARNING:
234:             case E_RECOVERABLE_ERROR:
235:                 $error = 'Warning';
236:                 $level = LOG_WARNING;
237:                 break;
238:             case E_NOTICE:
239:             case E_USER_NOTICE:
240:                 $error = 'Notice';
241:                 $level = LOG_NOTICE;
242:                 break;
243:             case E_DEPRECATED:
244:             case E_USER_DEPRECATED:
245:                 $error = 'Deprecated';
246:                 $level = LOG_NOTICE;
247:                 break;
248:             default:
249:                 return;
250:         }
251: 
252:         $data = compact(
253:             'level', 'error', 'code', 'description', 'file', 'path', 'line', 'context'
254:         );
255:         echo $self->outputError($data);
256: 
257:         if ($error === 'Fatal Error') {
258:             exit();
259:         }
260:         return true;
261:     }
262: 
263: /**
264:  * Outputs a stack trace based on the supplied options.
265:  *
266:  * ### Options
267:  *
268:  * - `depth` - The number of stack frames to return. Defaults to 999
269:  * - `format` - The format you want the return. Defaults to the currently selected format. If
270:  *    format is 'array' or 'points' the return will be an array.
271:  * - `args` - Should arguments for functions be shown?  If true, the arguments for each method call
272:  *   will be displayed.
273:  * - `start` - The stack frame to start generating a trace from. Defaults to 0
274:  *
275:  * @param array $options Format for outputting stack trace
276:  * @return mixed Formatted stack trace
277:  * @link http://book.cakephp.org/2.0/en/development/debugging.html#Debugger::trace
278:  */
279:     public static function trace($options = array()) {
280:         $self = Debugger::getInstance();
281:         $defaults = array(
282:             'depth'     => 999,
283:             'format'    => $self->_outputFormat,
284:             'args'      => false,
285:             'start'     => 0,
286:             'scope'     => null,
287:             'exclude'   => array('call_user_func_array', 'trigger_error')
288:         );
289:         $options = Hash::merge($defaults, $options);
290: 
291:         $backtrace = debug_backtrace();
292:         $count = count($backtrace);
293:         $back = array();
294: 
295:         $_trace = array(
296:             'line' => '??',
297:             'file' => '[internal]',
298:             'class' => null,
299:             'function' => '[main]'
300:         );
301: 
302:         for ($i = $options['start']; $i < $count && $i < $options['depth']; $i++) {
303:             $trace = array_merge(array('file' => '[internal]', 'line' => '??'), $backtrace[$i]);
304:             $signature = $reference = '[main]';
305: 
306:             if (isset($backtrace[$i + 1])) {
307:                 $next = array_merge($_trace, $backtrace[$i + 1]);
308:                 $signature = $reference = $next['function'];
309: 
310:                 if (!empty($next['class'])) {
311:                     $signature = $next['class'] . '::' . $next['function'];
312:                     $reference = $signature . '(';
313:                     if ($options['args'] && isset($next['args'])) {
314:                         $args = array();
315:                         foreach ($next['args'] as $arg) {
316:                             $args[] = Debugger::exportVar($arg);
317:                         }
318:                         $reference .= implode(', ', $args);
319:                     }
320:                     $reference .= ')';
321:                 }
322:             }
323:             if (in_array($signature, $options['exclude'])) {
324:                 continue;
325:             }
326:             if ($options['format'] === 'points' && $trace['file'] !== '[internal]') {
327:                 $back[] = array('file' => $trace['file'], 'line' => $trace['line']);
328:             } elseif ($options['format'] === 'array') {
329:                 $back[] = $trace;
330:             } else {
331:                 if (isset($self->_templates[$options['format']]['traceLine'])) {
332:                     $tpl = $self->_templates[$options['format']]['traceLine'];
333:                 } else {
334:                     $tpl = $self->_templates['base']['traceLine'];
335:                 }
336:                 $trace['path'] = self::trimPath($trace['file']);
337:                 $trace['reference'] = $reference;
338:                 unset($trace['object'], $trace['args']);
339:                 $back[] = String::insert($tpl, $trace, array('before' => '{:', 'after' => '}'));
340:             }
341:         }
342: 
343:         if ($options['format'] === 'array' || $options['format'] === 'points') {
344:             return $back;
345:         }
346:         return implode("\n", $back);
347:     }
348: 
349: /**
350:  * Shortens file paths by replacing the application base path with 'APP', and the CakePHP core
351:  * path with 'CORE'.
352:  *
353:  * @param string $path Path to shorten
354:  * @return string Normalized path
355:  */
356:     public static function trimPath($path) {
357:         if (!defined('CAKE_CORE_INCLUDE_PATH') || !defined('APP')) {
358:             return $path;
359:         }
360: 
361:         if (strpos($path, APP) === 0) {
362:             return str_replace(APP, 'APP' . DS, $path);
363:         } elseif (strpos($path, CAKE_CORE_INCLUDE_PATH) === 0) {
364:             return str_replace(CAKE_CORE_INCLUDE_PATH, 'CORE', $path);
365:         } elseif (strpos($path, ROOT) === 0) {
366:             return str_replace(ROOT, 'ROOT', $path);
367:         }
368: 
369:         return $path;
370:     }
371: 
372: /**
373:  * Grabs an excerpt from a file and highlights a given line of code.
374:  *
375:  * Usage:
376:  *
377:  * `Debugger::excerpt('/path/to/file', 100, 4);`
378:  *
379:  * The above would return an array of 8 items. The 4th item would be the provided line,
380:  * and would be wrapped in `<span class="code-highlight"></span>`. All of the lines
381:  * are processed with highlight_string() as well, so they have basic PHP syntax highlighting
382:  * applied.
383:  *
384:  * @param string $file Absolute path to a PHP file
385:  * @param integer $line Line number to highlight
386:  * @param integer $context Number of lines of context to extract above and below $line
387:  * @return array Set of lines highlighted
388:  * @see http://php.net/highlight_string
389:  * @link http://book.cakephp.org/2.0/en/development/debugging.html#Debugger::excerpt
390:  */
391:     public static function excerpt($file, $line, $context = 2) {
392:         $lines = array();
393:         if (!file_exists($file)) {
394:             return array();
395:         }
396:         $data = file_get_contents($file);
397:         if (empty($data)) {
398:             return $lines;
399:         }
400:         if (strpos($data, "\n") !== false) {
401:             $data = explode("\n", $data);
402:         }
403:         if (!isset($data[$line])) {
404:             return $lines;
405:         }
406:         for ($i = $line - ($context + 1); $i < $line + $context; $i++) {
407:             if (!isset($data[$i])) {
408:                 continue;
409:             }
410:             $string = str_replace(array("\r\n", "\n"), "", self::_highlight($data[$i]));
411:             if ($i == $line) {
412:                 $lines[] = '<span class="code-highlight">' . $string . '</span>';
413:             } else {
414:                 $lines[] = $string;
415:             }
416:         }
417:         return $lines;
418:     }
419: 
420: /**
421:  * Wraps the highlight_string function in case the server API does not
422:  * implement the function as it is the case of the HipHop interpreter
423:  *
424:  * @param string $str the string to convert
425:  * @return string
426:  */
427:     protected static function _highlight($str) {
428:         if (function_exists('hphp_log') || function_exists('hphp_gettid')) {
429:             return htmlentities($str);
430:         }
431:         $added = false;
432:         if (strpos($str, '<?php') === false) {
433:             $added = true;
434:             $str = "<?php \n" . $str;
435:         }
436:         $highlight = highlight_string($str, true);
437:         if ($added) {
438:             $highlight = str_replace(
439:                 '&lt;?php&nbsp;<br />',
440:                 '',
441:                 $highlight
442:             );
443:         }
444:         return $highlight;
445:     }
446: 
447: /**
448:  * Converts a variable to a string for debug output.
449:  *
450:  * *Note:* The following keys will have their contents
451:  * replaced with `*****`:
452:  *
453:  *  - password
454:  *  - login
455:  *  - host
456:  *  - database
457:  *  - port
458:  *  - prefix
459:  *  - schema
460:  *
461:  * This is done to protect database credentials, which could be accidentally
462:  * shown in an error message if CakePHP is deployed in development mode.
463:  *
464:  * @param string $var Variable to convert
465:  * @param integer $depth The depth to output to. Defaults to 3.
466:  * @return string Variable as a formatted string
467:  * @link http://book.cakephp.org/2.0/en/development/debugging.html#Debugger::exportVar
468:  */
469:     public static function exportVar($var, $depth = 3) {
470:         return self::_export($var, $depth, 0);
471:     }
472: 
473: /**
474:  * Protected export function used to keep track of indentation and recursion.
475:  *
476:  * @param mixed $var The variable to dump.
477:  * @param integer $depth The remaining depth.
478:  * @param integer $indent The current indentation level.
479:  * @return string The dumped variable.
480:  */
481:     protected static function _export($var, $depth, $indent) {
482:         switch (self::getType($var)) {
483:             case 'boolean':
484:                 return ($var) ? 'true' : 'false';
485:             case 'integer':
486:                 return '(int) ' . $var;
487:             case 'float':
488:                 return '(float) ' . $var;
489:             case 'string':
490:                 if (trim($var) === '') {
491:                     return "''";
492:                 }
493:                 return "'" . $var . "'";
494:             case 'array':
495:                 return self::_array($var, $depth - 1, $indent + 1);
496:             case 'resource':
497:                 return strtolower(gettype($var));
498:             case 'null':
499:                 return 'null';
500:             case 'unknown':
501:                 return 'unknown';
502:             default:
503:                 return self::_object($var, $depth - 1, $indent + 1);
504:         }
505:     }
506: 
507: /**
508:  * Export an array type object. Filters out keys used in datasource configuration.
509:  *
510:  * The following keys are replaced with ***'s
511:  *
512:  * - password
513:  * - login
514:  * - host
515:  * - database
516:  * - port
517:  * - prefix
518:  * - schema
519:  *
520:  * @param array $var The array to export.
521:  * @param integer $depth The current depth, used for recursion tracking.
522:  * @param integer $indent The current indentation level.
523:  * @return string Exported array.
524:  */
525:     protected static function _array(array $var, $depth, $indent) {
526:         $secrets = array(
527:             'password' => '*****',
528:             'login' => '*****',
529:             'host' => '*****',
530:             'database' => '*****',
531:             'port' => '*****',
532:             'prefix' => '*****',
533:             'schema' => '*****'
534:         );
535:         $replace = array_intersect_key($secrets, $var);
536:         $var = $replace + $var;
537: 
538:         $out = "array(";
539:         $break = $end = null;
540:         if (!empty($var)) {
541:             $break = "\n" . str_repeat("\t", $indent);
542:             $end = "\n" . str_repeat("\t", $indent - 1);
543:         }
544:         $vars = array();
545: 
546:         if ($depth >= 0) {
547:             foreach ($var as $key => $val) {
548:                 // Sniff for globals as !== explodes in < 5.4
549:                 if ($key === 'GLOBALS' && is_array($val) && isset($val['GLOBALS'])) {
550:                     $val = '[recursion]';
551:                 } elseif ($val !== $var) {
552:                     $val = self::_export($val, $depth, $indent);
553:                 }
554:                 $vars[] = $break . self::exportVar($key) .
555:                     ' => ' .
556:                     $val;
557:             }
558:         } else {
559:             $vars[] = $break . '[maximum depth reached]';
560:         }
561:         return $out . implode(',', $vars) . $end . ')';
562:     }
563: 
564: /**
565:  * Handles object to string conversion.
566:  *
567:  * @param string $var Object to convert
568:  * @param integer $depth The current depth, used for tracking recursion.
569:  * @param integer $indent The current indentation level.
570:  * @return string
571:  * @see Debugger::exportVar()
572:  */
573:     protected static function _object($var, $depth, $indent) {
574:         $out = '';
575:         $props = array();
576: 
577:         $className = get_class($var);
578:         $out .= 'object(' . $className . ') {';
579: 
580:         if ($depth > 0) {
581:             $end = "\n" . str_repeat("\t", $indent - 1);
582:             $break = "\n" . str_repeat("\t", $indent);
583:             $objectVars = get_object_vars($var);
584:             foreach ($objectVars as $key => $value) {
585:                 $value = self::_export($value, $depth - 1, $indent);
586:                 $props[] = "$key => " . $value;
587:             }
588: 
589:             if (version_compare(PHP_VERSION, '5.3.0') >= 0) {
590:                 $ref = new ReflectionObject($var);
591: 
592:                 $filters = array(
593:                     ReflectionProperty::IS_PROTECTED => 'protected',
594:                     ReflectionProperty::IS_PRIVATE => 'private',
595:                 );
596:                 foreach ($filters as $filter => $visibility) {
597:                     $reflectionProperties = $ref->getProperties($filter);
598:                     foreach ($reflectionProperties as $reflectionProperty) {
599:                         $reflectionProperty->setAccessible(true);
600:                         $property = $reflectionProperty->getValue($var);
601: 
602:                         $value = self::_export($property, $depth - 1, $indent);
603:                         $key = $reflectionProperty->name;
604:                         $props[] = sprintf('[%s] %s => %s', $visibility, $key, $value);
605:                     }
606:                 }
607:             }
608: 
609:             $out .= $break . implode($break, $props) . $end;
610:         }
611:         $out .= '}';
612:         return $out;
613:     }
614: 
615: /**
616:  * Get/Set the output format for Debugger error rendering.
617:  *
618:  * @param string $format The format you want errors to be output as.
619:  *   Leave null to get the current format.
620:  * @return mixed Returns null when setting. Returns the current format when getting.
621:  * @throws CakeException when choosing a format that doesn't exist.
622:  */
623:     public static function outputAs($format = null) {
624:         $self = Debugger::getInstance();
625:         if ($format === null) {
626:             return $self->_outputFormat;
627:         }
628:         if ($format !== false && !isset($self->_templates[$format])) {
629:             throw new CakeException(__d('cake_dev', 'Invalid Debugger output format.'));
630:         }
631:         $self->_outputFormat = $format;
632:     }
633: 
634: /**
635:  * Add an output format or update a format in Debugger.
636:  *
637:  * `Debugger::addFormat('custom', $data);`
638:  *
639:  * Where $data is an array of strings that use String::insert() variable
640:  * replacement. The template vars should be in a `{:id}` style.
641:  * An error formatter can have the following keys:
642:  *
643:  * - 'error' - Used for the container for the error message. Gets the following template
644:  *   variables: `id`, `error`, `code`, `description`, `path`, `line`, `links`, `info`
645:  * - 'info' - A combination of `code`, `context` and `trace`. Will be set with
646:  *   the contents of the other template keys.
647:  * - 'trace' - The container for a stack trace. Gets the following template
648:  *   variables: `trace`
649:  * - 'context' - The container element for the context variables.
650:  *   Gets the following templates: `id`, `context`
651:  * - 'links' - An array of HTML links that are used for creating links to other resources.
652:  *   Typically this is used to create javascript links to open other sections.
653:  *   Link keys, are: `code`, `context`, `help`. See the js output format for an
654:  *   example.
655:  * - 'traceLine' - Used for creating lines in the stacktrace. Gets the following
656:  *   template variables: `reference`, `path`, `line`
657:  *
658:  * Alternatively if you want to use a custom callback to do all the formatting, you can use
659:  * the callback key, and provide a callable:
660:  *
661:  * `Debugger::addFormat('custom', array('callback' => array($foo, 'outputError'));`
662:  *
663:  * The callback can expect two parameters. The first is an array of all
664:  * the error data. The second contains the formatted strings generated using
665:  * the other template strings. Keys like `info`, `links`, `code`, `context` and `trace`
666:  * will be present depending on the other templates in the format type.
667:  *
668:  * @param string $format Format to use, including 'js' for JavaScript-enhanced HTML, 'html' for
669:  *    straight HTML output, or 'txt' for unformatted text.
670:  * @param array $strings Template strings, or a callback to be used for the output format.
671:  * @return The resulting format string set.
672:  */
673:     public static function addFormat($format, array $strings) {
674:         $self = Debugger::getInstance();
675:         if (isset($self->_templates[$format])) {
676:             if (isset($strings['links'])) {
677:                 $self->_templates[$format]['links'] = array_merge(
678:                     $self->_templates[$format]['links'],
679:                     $strings['links']
680:                 );
681:                 unset($strings['links']);
682:             }
683:             $self->_templates[$format] = array_merge($self->_templates[$format], $strings);
684:         } else {
685:             $self->_templates[$format] = $strings;
686:         }
687:         return $self->_templates[$format];
688:     }
689: 
690: /**
691:  * Switches output format, updates format strings.
692:  * Can be used to switch the active output format:
693:  *
694:  * @param string $format Format to use, including 'js' for JavaScript-enhanced HTML, 'html' for
695:  *    straight HTML output, or 'txt' for unformatted text.
696:  * @param array $strings Template strings to be used for the output format.
697:  * @return string
698:  * @deprecated Use Debugger::outputAs() and Debugger::addFormat(). Will be removed
699:  *   in 3.0
700:  */
701:     public static function output($format = null, $strings = array()) {
702:         $self = Debugger::getInstance();
703:         $data = null;
704: 
705:         if ($format === null) {
706:             return Debugger::outputAs();
707:         }
708: 
709:         if (!empty($strings)) {
710:             return Debugger::addFormat($format, $strings);
711:         }
712: 
713:         if ($format === true && !empty($self->_data)) {
714:             $data = $self->_data;
715:             $self->_data = array();
716:             $format = false;
717:         }
718:         Debugger::outputAs($format);
719:         return $data;
720:     }
721: 
722: /**
723:  * Takes a processed array of data from an error and displays it in the chosen format.
724:  *
725:  * @param string $data
726:  * @return void
727:  */
728:     public function outputError($data) {
729:         $defaults = array(
730:             'level' => 0,
731:             'error' => 0,
732:             'code' => 0,
733:             'description' => '',
734:             'file' => '',
735:             'line' => 0,
736:             'context' => array(),
737:             'start' => 2,
738:         );
739:         $data += $defaults;
740: 
741:         $files = $this->trace(array('start' => $data['start'], 'format' => 'points'));
742:         $code = '';
743:         $file = null;
744:         if (isset($files[0]['file'])) {
745:             $file = $files[0];
746:         } elseif (isset($files[1]['file'])) {
747:             $file = $files[1];
748:         }
749:         if ($file) {
750:             $code = $this->excerpt($file['file'], $file['line'] - 1, 1);
751:         }
752:         $trace = $this->trace(array('start' => $data['start'], 'depth' => '20'));
753:         $insertOpts = array('before' => '{:', 'after' => '}');
754:         $context = array();
755:         $links = array();
756:         $info = '';
757: 
758:         foreach ((array)$data['context'] as $var => $value) {
759:             $context[] = "\${$var} = " . $this->exportVar($value, 3);
760:         }
761: 
762:         switch ($this->_outputFormat) {
763:             case false:
764:                 $this->_data[] = compact('context', 'trace') + $data;
765:                 return;
766:             case 'log':
767:                 $this->log(compact('context', 'trace') + $data);
768:                 return;
769:         }
770: 
771:         $data['trace'] = $trace;
772:         $data['id'] = 'cakeErr' . uniqid();
773:         $tpl = array_merge($this->_templates['base'], $this->_templates[$this->_outputFormat]);
774: 
775:         if (isset($tpl['links'])) {
776:             foreach ($tpl['links'] as $key => $val) {
777:                 $links[$key] = String::insert($val, $data, $insertOpts);
778:             }
779:         }
780: 
781:         if (!empty($tpl['escapeContext'])) {
782:             $context = h($context);
783:         }
784: 
785:         $infoData = compact('code', 'context', 'trace');
786:         foreach ($infoData as $key => $value) {
787:             if (empty($value) || !isset($tpl[$key])) {
788:                 continue;
789:             }
790:             if (is_array($value)) {
791:                 $value = implode("\n", $value);
792:             }
793:             $info .= String::insert($tpl[$key], array($key => $value) + $data, $insertOpts);
794:         }
795:         $links = implode(' ', $links);
796: 
797:         if (isset($tpl['callback']) && is_callable($tpl['callback'])) {
798:             return call_user_func($tpl['callback'], $data, compact('links', 'info'));
799:         }
800:         echo String::insert($tpl['error'], compact('links', 'info') + $data, $insertOpts);
801:     }
802: 
803: /**
804:  * Get the type of the given variable. Will return the class name
805:  * for objects.
806:  *
807:  * @param mixed $var The variable to get the type of
808:  * @return string The type of variable.
809:  */
810:     public static function getType($var) {
811:         if (is_object($var)) {
812:             return get_class($var);
813:         }
814:         if ($var === null) {
815:             return 'null';
816:         }
817:         if (is_string($var)) {
818:             return 'string';
819:         }
820:         if (is_array($var)) {
821:             return 'array';
822:         }
823:         if (is_int($var)) {
824:             return 'integer';
825:         }
826:         if (is_bool($var)) {
827:             return 'boolean';
828:         }
829:         if (is_float($var)) {
830:             return 'float';
831:         }
832:         if (is_resource($var)) {
833:             return 'resource';
834:         }
835:         return 'unknown';
836:     }
837: 
838: /**
839:  * Verifies that the application's salt and cipher seed value has been changed from the default value.
840:  *
841:  * @return void
842:  */
843:     public static function checkSecurityKeys() {
844:         if (Configure::read('Security.salt') === 'DYhG93b0qyJfIxfs2guVoUubWwvniR2G0FgaC9mi') {
845:             trigger_error(__d('cake_dev', 'Please change the value of %s in %s to a salt value specific to your application.', '\'Security.salt\'', 'APP/Config/core.php'), E_USER_NOTICE);
846:         }
847: 
848:         if (Configure::read('Security.cipherSeed') === '76859309657453542496749683645') {
849:             trigger_error(__d('cake_dev', 'Please change the value of %s in %s to a numeric (digits only) seed value specific to your application.', '\'Security.cipherSeed\'', 'APP/Config/core.php'), E_USER_NOTICE);
850:         }
851:     }
852: 
853: }
854: