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  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 $class Debugger class name.
152:  * @return object
153:  */
154:     public static function getInstance($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:  * @param mixed $var the variable to dump
171:  * @param int $depth The depth to output to. Defaults to 3.
172:  * @return void
173:  * @see Debugger::exportVar()
174:  * @link http://book.cakephp.org/2.0/en/development/debugging.html#Debugger::dump
175:  */
176:     public static function dump($var, $depth = 3) {
177:         pr(self::exportVar($var, $depth));
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 int $level type of log to use. Defaults to LOG_DEBUG
186:  * @param int $depth The depth to output to. Defaults to 3.
187:  * @return void
188:  * @link http://book.cakephp.org/2.0/en/development/debugging.html#Debugger::log
189:  */
190:     public static function log($var, $level = LOG_DEBUG, $depth = 3) {
191:         $source = self::trace(array('start' => 1)) . "\n";
192:         CakeLog::write($level, "\n" . $source . self::exportVar($var, $depth));
193:     }
194: 
195: /**
196:  * Overrides PHP's default error handling.
197:  *
198:  * @param int $code Code of error
199:  * @param string $description Error description
200:  * @param string $file File on which error occurred
201:  * @param int $line Line that triggered the error
202:  * @param array $context Context
203:  * @return bool true if error was handled
204:  * @deprecated 3.0.0 Will be removed in 3.0. This function is superseded by Debugger::outputError().
205:  */
206:     public static function showError($code, $description, $file = null, $line = null, $context = null) {
207:         $self = Debugger::getInstance();
208: 
209:         if (empty($file)) {
210:             $file = '[internal]';
211:         }
212:         if (empty($line)) {
213:             $line = '??';
214:         }
215: 
216:         $info = compact('code', 'description', 'file', 'line');
217:         if (!in_array($info, $self->errors)) {
218:             $self->errors[] = $info;
219:         } else {
220:             return;
221:         }
222: 
223:         switch ($code) {
224:             case E_PARSE:
225:             case E_ERROR:
226:             case E_CORE_ERROR:
227:             case E_COMPILE_ERROR:
228:             case E_USER_ERROR:
229:                 $error = 'Fatal Error';
230:                 $level = LOG_ERR;
231:                 break;
232:             case E_WARNING:
233:             case E_USER_WARNING:
234:             case E_COMPILE_WARNING:
235:             case E_RECOVERABLE_ERROR:
236:                 $error = 'Warning';
237:                 $level = LOG_WARNING;
238:                 break;
239:             case E_NOTICE:
240:             case E_USER_NOTICE:
241:                 $error = 'Notice';
242:                 $level = LOG_NOTICE;
243:                 break;
244:             case E_DEPRECATED:
245:             case E_USER_DEPRECATED:
246:                 $error = 'Deprecated';
247:                 $level = LOG_NOTICE;
248:                 break;
249:             default:
250:                 return;
251:         }
252: 
253:         $data = compact(
254:             'level', 'error', 'code', 'description', 'file', 'path', 'line', 'context'
255:         );
256:         echo $self->outputError($data);
257: 
258:         if ($error === 'Fatal Error') {
259:             exit();
260:         }
261:         return true;
262:     }
263: 
264: /**
265:  * Outputs a stack trace based on the supplied options.
266:  *
267:  * ### Options
268:  *
269:  * - `depth` - The number of stack frames to return. Defaults to 999
270:  * - `format` - The format you want the return. Defaults to the currently selected format. If
271:  *    format is 'array' or 'points' the return will be an array.
272:  * - `args` - Should arguments for functions be shown?  If true, the arguments for each method call
273:  *   will be displayed.
274:  * - `start` - The stack frame to start generating a trace from. Defaults to 0
275:  *
276:  * @param array $options Format for outputting stack trace
277:  * @return mixed Formatted stack trace
278:  * @link http://book.cakephp.org/2.0/en/development/debugging.html#Debugger::trace
279:  */
280:     public static function trace($options = array()) {
281:         $self = Debugger::getInstance();
282:         $defaults = array(
283:             'depth'     => 999,
284:             'format'    => $self->_outputFormat,
285:             'args'      => false,
286:             'start'     => 0,
287:             'scope'     => null,
288:             'exclude'   => array('call_user_func_array', 'trigger_error')
289:         );
290:         $options = Hash::merge($defaults, $options);
291: 
292:         $backtrace = debug_backtrace();
293:         $count = count($backtrace);
294:         $back = array();
295: 
296:         $_trace = array(
297:             'line' => '??',
298:             'file' => '[internal]',
299:             'class' => null,
300:             'function' => '[main]'
301:         );
302: 
303:         for ($i = $options['start']; $i < $count && $i < $options['depth']; $i++) {
304:             $trace = array_merge(array('file' => '[internal]', 'line' => '??'), $backtrace[$i]);
305:             $signature = $reference = '[main]';
306: 
307:             if (isset($backtrace[$i + 1])) {
308:                 $next = array_merge($_trace, $backtrace[$i + 1]);
309:                 $signature = $reference = $next['function'];
310: 
311:                 if (!empty($next['class'])) {
312:                     $signature = $next['class'] . '::' . $next['function'];
313:                     $reference = $signature . '(';
314:                     if ($options['args'] && isset($next['args'])) {
315:                         $args = array();
316:                         foreach ($next['args'] as $arg) {
317:                             $args[] = Debugger::exportVar($arg);
318:                         }
319:                         $reference .= implode(', ', $args);
320:                     }
321:                     $reference .= ')';
322:                 }
323:             }
324:             if (in_array($signature, $options['exclude'])) {
325:                 continue;
326:             }
327:             if ($options['format'] === 'points' && $trace['file'] !== '[internal]') {
328:                 $back[] = array('file' => $trace['file'], 'line' => $trace['line']);
329:             } elseif ($options['format'] === 'array') {
330:                 $back[] = $trace;
331:             } else {
332:                 if (isset($self->_templates[$options['format']]['traceLine'])) {
333:                     $tpl = $self->_templates[$options['format']]['traceLine'];
334:                 } else {
335:                     $tpl = $self->_templates['base']['traceLine'];
336:                 }
337:                 $trace['path'] = self::trimPath($trace['file']);
338:                 $trace['reference'] = $reference;
339:                 unset($trace['object'], $trace['args']);
340:                 $back[] = String::insert($tpl, $trace, array('before' => '{:', 'after' => '}'));
341:             }
342:         }
343: 
344:         if ($options['format'] === 'array' || $options['format'] === 'points') {
345:             return $back;
346:         }
347:         return implode("\n", $back);
348:     }
349: 
350: /**
351:  * Shortens file paths by replacing the application base path with 'APP', and the CakePHP core
352:  * path with 'CORE'.
353:  *
354:  * @param string $path Path to shorten
355:  * @return string Normalized path
356:  */
357:     public static function trimPath($path) {
358:         if (!defined('CAKE_CORE_INCLUDE_PATH') || !defined('APP')) {
359:             return $path;
360:         }
361: 
362:         if (strpos($path, APP) === 0) {
363:             return str_replace(APP, 'APP' . DS, $path);
364:         } elseif (strpos($path, CAKE_CORE_INCLUDE_PATH) === 0) {
365:             return str_replace(CAKE_CORE_INCLUDE_PATH, 'CORE', $path);
366:         } elseif (strpos($path, ROOT) === 0) {
367:             return str_replace(ROOT, 'ROOT', $path);
368:         }
369: 
370:         return $path;
371:     }
372: 
373: /**
374:  * Grabs an excerpt from a file and highlights a given line of code.
375:  *
376:  * Usage:
377:  *
378:  * `Debugger::excerpt('/path/to/file', 100, 4);`
379:  *
380:  * The above would return an array of 8 items. The 4th item would be the provided line,
381:  * and would be wrapped in `<span class="code-highlight"></span>`. All of the lines
382:  * are processed with highlight_string() as well, so they have basic PHP syntax highlighting
383:  * applied.
384:  *
385:  * @param string $file Absolute path to a PHP file
386:  * @param int $line Line number to highlight
387:  * @param int $context Number of lines of context to extract above and below $line
388:  * @return array Set of lines highlighted
389:  * @see http://php.net/highlight_string
390:  * @link http://book.cakephp.org/2.0/en/development/debugging.html#Debugger::excerpt
391:  */
392:     public static function excerpt($file, $line, $context = 2) {
393:         $lines = array();
394:         if (!file_exists($file)) {
395:             return array();
396:         }
397:         $data = file_get_contents($file);
398:         if (empty($data)) {
399:             return $lines;
400:         }
401:         if (strpos($data, "\n") !== false) {
402:             $data = explode("\n", $data);
403:         }
404:         if (!isset($data[$line])) {
405:             return $lines;
406:         }
407:         for ($i = $line - ($context + 1); $i < $line + $context; $i++) {
408:             if (!isset($data[$i])) {
409:                 continue;
410:             }
411:             $string = str_replace(array("\r\n", "\n"), "", self::_highlight($data[$i]));
412:             if ($i == $line) {
413:                 $lines[] = '<span class="code-highlight">' . $string . '</span>';
414:             } else {
415:                 $lines[] = $string;
416:             }
417:         }
418:         return $lines;
419:     }
420: 
421: /**
422:  * Wraps the highlight_string function in case the server API does not
423:  * implement the function as it is the case of the HipHop interpreter
424:  *
425:  * @param string $str the string to convert
426:  * @return string
427:  */
428:     protected static function _highlight($str) {
429:         if (function_exists('hphp_log') || function_exists('hphp_gettid')) {
430:             return htmlentities($str);
431:         }
432:         $added = false;
433:         if (strpos($str, '<?php') === false) {
434:             $added = true;
435:             $str = "<?php \n" . $str;
436:         }
437:         $highlight = highlight_string($str, true);
438:         if ($added) {
439:             $highlight = str_replace(
440:                 '&lt;?php&nbsp;<br />',
441:                 '',
442:                 $highlight
443:             );
444:         }
445:         return $highlight;
446:     }
447: 
448: /**
449:  * Converts a variable to a string for debug output.
450:  *
451:  * *Note:* The following keys will have their contents
452:  * replaced with `*****`:
453:  *
454:  *  - password
455:  *  - login
456:  *  - host
457:  *  - database
458:  *  - port
459:  *  - prefix
460:  *  - schema
461:  *
462:  * This is done to protect database credentials, which could be accidentally
463:  * shown in an error message if CakePHP is deployed in development mode.
464:  *
465:  * @param string $var Variable to convert
466:  * @param int $depth The depth to output to. Defaults to 3.
467:  * @return string Variable as a formatted string
468:  * @link http://book.cakephp.org/2.0/en/development/debugging.html#Debugger::exportVar
469:  */
470:     public static function exportVar($var, $depth = 3) {
471:         return self::_export($var, $depth, 0);
472:     }
473: 
474: /**
475:  * Protected export function used to keep track of indentation and recursion.
476:  *
477:  * @param mixed $var The variable to dump.
478:  * @param int $depth The remaining depth.
479:  * @param int $indent The current indentation level.
480:  * @return string The dumped variable.
481:  */
482:     protected static function _export($var, $depth, $indent) {
483:         switch (self::getType($var)) {
484:             case 'boolean':
485:                 return ($var) ? 'true' : 'false';
486:             case 'integer':
487:                 return '(int) ' . $var;
488:             case 'float':
489:                 return '(float) ' . $var;
490:             case 'string':
491:                 if (trim($var) === '') {
492:                     return "''";
493:                 }
494:                 return "'" . $var . "'";
495:             case 'array':
496:                 return self::_array($var, $depth - 1, $indent + 1);
497:             case 'resource':
498:                 return strtolower(gettype($var));
499:             case 'null':
500:                 return 'null';
501:             case 'unknown':
502:                 return 'unknown';
503:             default:
504:                 return self::_object($var, $depth - 1, $indent + 1);
505:         }
506:     }
507: 
508: /**
509:  * Export an array type object. Filters out keys used in datasource configuration.
510:  *
511:  * The following keys are replaced with ***'s
512:  *
513:  * - password
514:  * - login
515:  * - host
516:  * - database
517:  * - port
518:  * - prefix
519:  * - schema
520:  *
521:  * @param array $var The array to export.
522:  * @param int $depth The current depth, used for recursion tracking.
523:  * @param int $indent The current indentation level.
524:  * @return string Exported array.
525:  */
526:     protected static function _array(array $var, $depth, $indent) {
527:         $secrets = array(
528:             'password' => '*****',
529:             'login' => '*****',
530:             'host' => '*****',
531:             'database' => '*****',
532:             'port' => '*****',
533:             'prefix' => '*****',
534:             'schema' => '*****'
535:         );
536:         $replace = array_intersect_key($secrets, $var);
537:         $var = $replace + $var;
538: 
539:         $out = "array(";
540:         $break = $end = null;
541:         if (!empty($var)) {
542:             $break = "\n" . str_repeat("\t", $indent);
543:             $end = "\n" . str_repeat("\t", $indent - 1);
544:         }
545:         $vars = array();
546: 
547:         if ($depth >= 0) {
548:             foreach ($var as $key => $val) {
549:                 // Sniff for globals as !== explodes in < 5.4
550:                 if ($key === 'GLOBALS' && is_array($val) && isset($val['GLOBALS'])) {
551:                     $val = '[recursion]';
552:                 } elseif ($val !== $var) {
553:                     $val = self::_export($val, $depth, $indent);
554:                 }
555:                 $vars[] = $break . self::exportVar($key) .
556:                     ' => ' .
557:                     $val;
558:             }
559:         } else {
560:             $vars[] = $break . '[maximum depth reached]';
561:         }
562:         return $out . implode(',', $vars) . $end . ')';
563:     }
564: 
565: /**
566:  * Handles object to string conversion.
567:  *
568:  * @param string $var Object to convert
569:  * @param int $depth The current depth, used for tracking recursion.
570:  * @param int $indent The current indentation level.
571:  * @return string
572:  * @see Debugger::exportVar()
573:  */
574:     protected static function _object($var, $depth, $indent) {
575:         $out = '';
576:         $props = array();
577: 
578:         $className = get_class($var);
579:         $out .= 'object(' . $className . ') {';
580: 
581:         if ($depth > 0) {
582:             $end = "\n" . str_repeat("\t", $indent - 1);
583:             $break = "\n" . str_repeat("\t", $indent);
584:             $objectVars = get_object_vars($var);
585:             foreach ($objectVars as $key => $value) {
586:                 $value = self::_export($value, $depth - 1, $indent);
587:                 $props[] = "$key => " . $value;
588:             }
589: 
590:             if (version_compare(PHP_VERSION, '5.3.0') >= 0) {
591:                 $ref = new ReflectionObject($var);
592: 
593:                 $filters = array(
594:                     ReflectionProperty::IS_PROTECTED => 'protected',
595:                     ReflectionProperty::IS_PRIVATE => 'private',
596:                 );
597:                 foreach ($filters as $filter => $visibility) {
598:                     $reflectionProperties = $ref->getProperties($filter);
599:                     foreach ($reflectionProperties as $reflectionProperty) {
600:                         $reflectionProperty->setAccessible(true);
601:                         $property = $reflectionProperty->getValue($var);
602: 
603:                         $value = self::_export($property, $depth - 1, $indent);
604:                         $key = $reflectionProperty->name;
605:                         $props[] = sprintf('[%s] %s => %s', $visibility, $key, $value);
606:                     }
607:                 }
608:             }
609: 
610:             $out .= $break . implode($break, $props) . $end;
611:         }
612:         $out .= '}';
613:         return $out;
614:     }
615: 
616: /**
617:  * Get/Set the output format for Debugger error rendering.
618:  *
619:  * @param string $format The format you want errors to be output as.
620:  *   Leave null to get the current format.
621:  * @return mixed Returns null when setting. Returns the current format when getting.
622:  * @throws CakeException when choosing a format that doesn't exist.
623:  */
624:     public static function outputAs($format = null) {
625:         $self = Debugger::getInstance();
626:         if ($format === null) {
627:             return $self->_outputFormat;
628:         }
629:         if ($format !== false && !isset($self->_templates[$format])) {
630:             throw new CakeException(__d('cake_dev', 'Invalid Debugger output format.'));
631:         }
632:         $self->_outputFormat = $format;
633:     }
634: 
635: /**
636:  * Add an output format or update a format in Debugger.
637:  *
638:  * `Debugger::addFormat('custom', $data);`
639:  *
640:  * Where $data is an array of strings that use String::insert() variable
641:  * replacement. The template vars should be in a `{:id}` style.
642:  * An error formatter can have the following keys:
643:  *
644:  * - 'error' - Used for the container for the error message. Gets the following template
645:  *   variables: `id`, `error`, `code`, `description`, `path`, `line`, `links`, `info`
646:  * - 'info' - A combination of `code`, `context` and `trace`. Will be set with
647:  *   the contents of the other template keys.
648:  * - 'trace' - The container for a stack trace. Gets the following template
649:  *   variables: `trace`
650:  * - 'context' - The container element for the context variables.
651:  *   Gets the following templates: `id`, `context`
652:  * - 'links' - An array of HTML links that are used for creating links to other resources.
653:  *   Typically this is used to create javascript links to open other sections.
654:  *   Link keys, are: `code`, `context`, `help`. See the js output format for an
655:  *   example.
656:  * - 'traceLine' - Used for creating lines in the stacktrace. Gets the following
657:  *   template variables: `reference`, `path`, `line`
658:  *
659:  * Alternatively if you want to use a custom callback to do all the formatting, you can use
660:  * the callback key, and provide a callable:
661:  *
662:  * `Debugger::addFormat('custom', array('callback' => array($foo, 'outputError'));`
663:  *
664:  * The callback can expect two parameters. The first is an array of all
665:  * the error data. The second contains the formatted strings generated using
666:  * the other template strings. Keys like `info`, `links`, `code`, `context` and `trace`
667:  * will be present depending on the other templates in the format type.
668:  *
669:  * @param string $format Format to use, including 'js' for JavaScript-enhanced HTML, 'html' for
670:  *    straight HTML output, or 'txt' for unformatted text.
671:  * @param array $strings Template strings, or a callback to be used for the output format.
672:  * @return The resulting format string set.
673:  */
674:     public static function addFormat($format, array $strings) {
675:         $self = Debugger::getInstance();
676:         if (isset($self->_templates[$format])) {
677:             if (isset($strings['links'])) {
678:                 $self->_templates[$format]['links'] = array_merge(
679:                     $self->_templates[$format]['links'],
680:                     $strings['links']
681:                 );
682:                 unset($strings['links']);
683:             }
684:             $self->_templates[$format] = array_merge($self->_templates[$format], $strings);
685:         } else {
686:             $self->_templates[$format] = $strings;
687:         }
688:         return $self->_templates[$format];
689:     }
690: 
691: /**
692:  * Switches output format, updates format strings.
693:  * Can be used to switch the active output format:
694:  *
695:  * @param string $format Format to use, including 'js' for JavaScript-enhanced HTML, 'html' for
696:  *    straight HTML output, or 'txt' for unformatted text.
697:  * @param array $strings Template strings to be used for the output format.
698:  * @return string
699:  * @deprecated 3.0.0 Use Debugger::outputAs() and Debugger::addFormat(). Will be removed
700:  *   in 3.0
701:  */
702:     public static function output($format = null, $strings = array()) {
703:         $self = Debugger::getInstance();
704:         $data = null;
705: 
706:         if ($format === null) {
707:             return Debugger::outputAs();
708:         }
709: 
710:         if (!empty($strings)) {
711:             return Debugger::addFormat($format, $strings);
712:         }
713: 
714:         if ($format === true && !empty($self->_data)) {
715:             $data = $self->_data;
716:             $self->_data = array();
717:             $format = false;
718:         }
719:         Debugger::outputAs($format);
720:         return $data;
721:     }
722: 
723: /**
724:  * Takes a processed array of data from an error and displays it in the chosen format.
725:  *
726:  * @param string $data Data to output.
727:  * @return void
728:  */
729:     public function outputError($data) {
730:         $defaults = array(
731:             'level' => 0,
732:             'error' => 0,
733:             'code' => 0,
734:             'description' => '',
735:             'file' => '',
736:             'line' => 0,
737:             'context' => array(),
738:             'start' => 2,
739:         );
740:         $data += $defaults;
741: 
742:         $files = $this->trace(array('start' => $data['start'], 'format' => 'points'));
743:         $code = '';
744:         $file = null;
745:         if (isset($files[0]['file'])) {
746:             $file = $files[0];
747:         } elseif (isset($files[1]['file'])) {
748:             $file = $files[1];
749:         }
750:         if ($file) {
751:             $code = $this->excerpt($file['file'], $file['line'] - 1, 1);
752:         }
753:         $trace = $this->trace(array('start' => $data['start'], 'depth' => '20'));
754:         $insertOpts = array('before' => '{:', 'after' => '}');
755:         $context = array();
756:         $links = array();
757:         $info = '';
758: 
759:         foreach ((array)$data['context'] as $var => $value) {
760:             $context[] = "\${$var} = " . $this->exportVar($value, 3);
761:         }
762: 
763:         switch ($this->_outputFormat) {
764:             case false:
765:                 $this->_data[] = compact('context', 'trace') + $data;
766:                 return;
767:             case 'log':
768:                 $this->log(compact('context', 'trace') + $data);
769:                 return;
770:         }
771: 
772:         $data['trace'] = $trace;
773:         $data['id'] = 'cakeErr' . uniqid();
774:         $tpl = array_merge($this->_templates['base'], $this->_templates[$this->_outputFormat]);
775: 
776:         if (isset($tpl['links'])) {
777:             foreach ($tpl['links'] as $key => $val) {
778:                 $links[$key] = String::insert($val, $data, $insertOpts);
779:             }
780:         }
781: 
782:         if (!empty($tpl['escapeContext'])) {
783:             $context = h($context);
784:         }
785: 
786:         $infoData = compact('code', 'context', 'trace');
787:         foreach ($infoData as $key => $value) {
788:             if (empty($value) || !isset($tpl[$key])) {
789:                 continue;
790:             }
791:             if (is_array($value)) {
792:                 $value = implode("\n", $value);
793:             }
794:             $info .= String::insert($tpl[$key], array($key => $value) + $data, $insertOpts);
795:         }
796:         $links = implode(' ', $links);
797: 
798:         if (isset($tpl['callback']) && is_callable($tpl['callback'])) {
799:             return call_user_func($tpl['callback'], $data, compact('links', 'info'));
800:         }
801:         echo String::insert($tpl['error'], compact('links', 'info') + $data, $insertOpts);
802:     }
803: 
804: /**
805:  * Get the type of the given variable. Will return the class name
806:  * for objects.
807:  *
808:  * @param mixed $var The variable to get the type of
809:  * @return string The type of variable.
810:  */
811:     public static function getType($var) {
812:         if (is_object($var)) {
813:             return get_class($var);
814:         }
815:         if ($var === null) {
816:             return 'null';
817:         }
818:         if (is_string($var)) {
819:             return 'string';
820:         }
821:         if (is_array($var)) {
822:             return 'array';
823:         }
824:         if (is_int($var)) {
825:             return 'integer';
826:         }
827:         if (is_bool($var)) {
828:             return 'boolean';
829:         }
830:         if (is_float($var)) {
831:             return 'float';
832:         }
833:         if (is_resource($var)) {
834:             return 'resource';
835:         }
836:         return 'unknown';
837:     }
838: 
839: /**
840:  * Verifies that the application's salt and cipher seed value has been changed from the default value.
841:  *
842:  * @return void
843:  */
844:     public static function checkSecurityKeys() {
845:         if (Configure::read('Security.salt') === 'DYhG93b0qyJfIxfs2guVoUubWwvniR2G0FgaC9mi') {
846:             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);
847:         }
848: 
849:         if (Configure::read('Security.cipherSeed') === '76859309657453542496749683645') {
850:             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);
851:         }
852:     }
853: 
854: }
855: 
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