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<?php

/**

 * Framework debugging and PHP error-handling class

 *

 * Provides enhanced logging, stack traces, and rendering debug views

 *

 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)

 * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)

 *

 * Licensed under The MIT License

 * For full copyright and license information, please see the LICENSE.txt

 * Redistributions of files must retain the above copyright notice.

 *

 * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)

 * @link          http://cakephp.org CakePHP(tm) Project

 * @package       Cake.Utility

 * @since         CakePHP(tm) v 1.2.4560

 * @license       http://www.opensource.org/licenses/mit-license.php MIT License

 */

App::uses('CakeLog', 'Log');

App::uses('String', 'Utility');

/**

 * Provide custom logging and error handling.

 *

 * Debugger overrides PHP's default error handling to provide stack traces and enhanced logging

 *

 * @package       Cake.Utility

 * @link          http://book.cakephp.org/2.0/en/development/debugging.html#debugger-class

 */

class Debugger {

/**

 * A list of errors generated by the application.

 *

 * @var array

 */

	public $errors = array();

/**

 * The current output format.

 *

 * @var string

 */

	protected $_outputFormat = 'js';

/**

 * Templates used when generating trace or error strings. Can be global or indexed by the format

 * value used in $_outputFormat.

 *

 * @var string

 */

	protected $_templates = array(

		'log' => array(

			'trace' => '{:reference} - {:path}, line {:line}',

			'error' => "{:error} ({:code}): {:description} in [{:file}, line {:line}]"

		),

		'js' => array(

			'error' => '',

			'info' => '',

			'trace' => '<pre class="stack-trace">{:trace}</pre>',

			'code' => '',

			'context' => '',

			'links' => array(),

			'escapeContext' => true,

		),

		'html' => array(

			'trace' => '<pre class="cake-error trace"><b>Trace</b> <p>{:trace}</p></pre>',

			'context' => '<pre class="cake-error context"><b>Context</b> <p>{:context}</p></pre>',

			'escapeContext' => true,

		),

		'txt' => array(

			'error' => "{:error}: {:code} :: {:description} on line {:line} of {:path}\n{:info}",

			'code' => '',

			'info' => ''

		),

		'base' => array(

			'traceLine' => '{:reference} - {:path}, line {:line}',

			'trace' => "Trace:\n{:trace}\n",

			'context' => "Context:\n{:context}\n",

		),

		'log' => array(),

	);

/**

 * Holds current output data when outputFormat is false.

 *

 * @var string

 */

	protected $_data = array();

/**

 * Constructor.

 *

 */

	public function __construct() {

		$docRef = ini_get('docref_root');

		if (empty($docRef) && function_exists('ini_set')) {

			ini_set('docref_root', 'http://php.net/');

		}

		if (!defined('E_RECOVERABLE_ERROR')) {

			define('E_RECOVERABLE_ERROR', 4096);

		}

		$e = '<pre class="cake-error">';

		$e .= '<a href="javascript:void(0);" onclick="document.getElementById(\'{:id}-trace\')';

		$e .= '.style.display = (document.getElementById(\'{:id}-trace\').style.display == ';

		$e .= '\'none\' ? \'\' : \'none\');"><b>{:error}</b> ({:code})</a>: {:description} ';

		$e .= '[<b>{:path}</b>, line <b>{:line}</b>]';

		$e .= '<div id="{:id}-trace" class="cake-stack-trace" style="display: none;">';

		$e .= '{:links}{:info}</div>';

		$e .= '</pre>';

		$this->_templates['js']['error'] = $e;

		$t = '<div id="{:id}-trace" class="cake-stack-trace" style="display: none;">';

		$t .= '{:context}{:code}{:trace}</div>';

		$this->_templates['js']['info'] = $t;

		$links = array();

		$link = '<a href="javascript:void(0);" onclick="document.getElementById(\'{:id}-code\')';

		$link .= '.style.display = (document.getElementById(\'{:id}-code\').style.display == ';

		$link .= '\'none\' ? \'\' : \'none\')">Code</a>';

		$links['code'] = $link;

		$link = '<a href="javascript:void(0);" onclick="document.getElementById(\'{:id}-context\')';

		$link .= '.style.display = (document.getElementById(\'{:id}-context\').style.display == ';

		$link .= '\'none\' ? \'\' : \'none\')">Context</a>';

		$links['context'] = $link;

		$this->_templates['js']['links'] = $links;

		$this->_templates['js']['context'] = '<pre id="{:id}-context" class="cake-context" ';

		$this->_templates['js']['context'] .= 'style="display: none;">{:context}</pre>';

		$this->_templates['js']['code'] = '<pre id="{:id}-code" class="cake-code-dump" ';

		$this->_templates['js']['code'] .= 'style="display: none;">{:code}</pre>';

		$e = '<pre class="cake-error"><b>{:error}</b> ({:code}) : {:description} ';

		$e .= '[<b>{:path}</b>, line <b>{:line}]</b></pre>';

		$this->_templates['html']['error'] = $e;

		$this->_templates['html']['context'] = '<pre class="cake-context"><b>Context</b> ';

		$this->_templates['html']['context'] .= '<p>{:context}</p></pre>';

	}

/**

 * Returns a reference to the Debugger singleton object instance.

 *

 * @param string $class

 * @return object

 */

	public static function getInstance($class = null) {

		static $instance = array();

		if (!empty($class)) {

			if (!$instance || strtolower($class) != strtolower(get_class($instance[0]))) {

				$instance[0] = new $class();

			}

		}

		if (!$instance) {

			$instance[0] = new Debugger();

		}

		return $instance[0];

	}

/**

 * Recursively formats and outputs the contents of the supplied variable.

 *

 *

 * @param mixed $var the variable to dump

 * @return void

 * @see Debugger::exportVar()

 * @link http://book.cakephp.org/2.0/en/development/debugging.html#Debugger::dump

 */

	public static function dump($var) {

		pr(self::exportVar($var));

	}

/**

 * Creates an entry in the log file. The log entry will contain a stack trace from where it was called.

 * as well as export the variable using exportVar. By default the log is written to the debug log.

 *

 * @param mixed $var Variable or content to log

 * @param integer $level type of log to use. Defaults to LOG_DEBUG

 * @return void

 * @link http://book.cakephp.org/2.0/en/development/debugging.html#Debugger::log

 */

	public static function log($var, $level = LOG_DEBUG) {

		$source = self::trace(array('start' => 1)) . "\n";

		CakeLog::write($level, "\n" . $source . self::exportVar($var));

	}

/**

 * Overrides PHP's default error handling.

 *

 * @param integer $code Code of error

 * @param string $description Error description

 * @param string $file File on which error occurred

 * @param integer $line Line that triggered the error

 * @param array $context Context

 * @return boolean true if error was handled

 * @deprecated Will be removed in 3.0. This function is superseded by Debugger::outputError().

 */

	public static function showError($code, $description, $file = null, $line = null, $context = null) {

		$self = Debugger::getInstance();

		if (empty($file)) {

			$file = '[internal]';

		}

		if (empty($line)) {

			$line = '??';

		}

		$info = compact('code', 'description', 'file', 'line');

		if (!in_array($info, $self->errors)) {

			$self->errors[] = $info;

		} else {

			return;

		}

		switch ($code) {

			case E_PARSE:

			case E_ERROR:

			case E_CORE_ERROR:

			case E_COMPILE_ERROR:

			case E_USER_ERROR:

				$error = 'Fatal Error';

				$level = LOG_ERR;

				break;

			case E_WARNING:

			case E_USER_WARNING:

			case E_COMPILE_WARNING:

			case E_RECOVERABLE_ERROR:

				$error = 'Warning';

				$level = LOG_WARNING;

				break;

			case E_NOTICE:

			case E_USER_NOTICE:

				$error = 'Notice';

				$level = LOG_NOTICE;

				break;

			case E_DEPRECATED:

			case E_USER_DEPRECATED:

				$error = 'Deprecated';

				$level = LOG_NOTICE;

				break;

			default:

				return;

		}

		$data = compact(

			'level', 'error', 'code', 'description', 'file', 'path', 'line', 'context'

		);

		echo $self->outputError($data);

		if ($error === 'Fatal Error') {

			exit();

		}

		return true;

	}

/**

 * Outputs a stack trace based on the supplied options.

 *

 * ### Options

 *

 * - `depth` - The number of stack frames to return. Defaults to 999

 * - `format` - The format you want the return. Defaults to the currently selected format. If

 *    format is 'array' or 'points' the return will be an array.

 * - `args` - Should arguments for functions be shown?  If true, the arguments for each method call

 *   will be displayed.

 * - `start` - The stack frame to start generating a trace from. Defaults to 0

 *

 * @param array $options Format for outputting stack trace

 * @return mixed Formatted stack trace

 * @link http://book.cakephp.org/2.0/en/development/debugging.html#Debugger::trace

 */

	public static function trace($options = array()) {

		$self = Debugger::getInstance();

		$defaults = array(

			'depth'		=> 999,

			'format'	=> $self->_outputFormat,

			'args'		=> false,

			'start'		=> 0,

			'scope'		=> null,

			'exclude'	=> array('call_user_func_array', 'trigger_error')

		);

		$options = Hash::merge($defaults, $options);

		$backtrace = debug_backtrace();

		$count = count($backtrace);

		$back = array();

		$_trace = array(

			'line' => '??',

			'file' => '[internal]',

			'class' => null,

			'function' => '[main]'

		);

		for ($i = $options['start']; $i < $count && $i < $options['depth']; $i++) {

			$trace = array_merge(array('file' => '[internal]', 'line' => '??'), $backtrace[$i]);

			$signature = $reference = '[main]';

			if (isset($backtrace[$i + 1])) {

				$next = array_merge($_trace, $backtrace[$i + 1]);

				$signature = $reference = $next['function'];

				if (!empty($next['class'])) {

					$signature = $next['class'] . '::' . $next['function'];

					$reference = $signature . '(';

					if ($options['args'] && isset($next['args'])) {

						$args = array();

						foreach ($next['args'] as $arg) {

							$args[] = Debugger::exportVar($arg);

						}

						$reference .= implode(', ', $args);

					}

					$reference .= ')';

				}

			}

			if (in_array($signature, $options['exclude'])) {

				continue;

			}

			if ($options['format'] === 'points' && $trace['file'] !== '[internal]') {

				$back[] = array('file' => $trace['file'], 'line' => $trace['line']);

			} elseif ($options['format'] === 'array') {

				$back[] = $trace;

			} else {

				if (isset($self->_templates[$options['format']]['traceLine'])) {

					$tpl = $self->_templates[$options['format']]['traceLine'];

				} else {

					$tpl = $self->_templates['base']['traceLine'];

				}

				$trace['path'] = self::trimPath($trace['file']);

				$trace['reference'] = $reference;

				unset($trace['object'], $trace['args']);

				$back[] = String::insert($tpl, $trace, array('before' => '{:', 'after' => '}'));

			}

		}

		if ($options['format'] === 'array' || $options['format'] === 'points') {

			return $back;

		}

		return implode("\n", $back);

	}

/**

 * Shortens file paths by replacing the application base path with 'APP', and the CakePHP core

 * path with 'CORE'.

 *

 * @param string $path Path to shorten

 * @return string Normalized path

 */

	public static function trimPath($path) {

		if (!defined('CAKE_CORE_INCLUDE_PATH') || !defined('APP')) {

			return $path;

		}

		if (strpos($path, APP) === 0) {

			return str_replace(APP, 'APP' . DS, $path);

		} elseif (strpos($path, CAKE_CORE_INCLUDE_PATH) === 0) {

			return str_replace(CAKE_CORE_INCLUDE_PATH, 'CORE', $path);

		} elseif (strpos($path, ROOT) === 0) {

			return str_replace(ROOT, 'ROOT', $path);

		}

		return $path;

	}

/**

 * Grabs an excerpt from a file and highlights a given line of code.

 *

 * Usage:

 *

 * `Debugger::excerpt('/path/to/file', 100, 4);`

 *

 * The above would return an array of 8 items. The 4th item would be the provided line,

 * and would be wrapped in `<span class="code-highlight"></span>`. All of the lines

 * are processed with highlight_string() as well, so they have basic PHP syntax highlighting

 * applied.

 *

 * @param string $file Absolute path to a PHP file

 * @param integer $line Line number to highlight

 * @param integer $context Number of lines of context to extract above and below $line

 * @return array Set of lines highlighted

 * @see http://php.net/highlight_string

 * @link http://book.cakephp.org/2.0/en/development/debugging.html#Debugger::excerpt

 */

	public static function excerpt($file, $line, $context = 2) {

		$lines = array();

		if (!file_exists($file)) {

			return array();

		}

		$data = file_get_contents($file);

		if (empty($data)) {

			return $lines;

		}

		if (strpos($data, "\n") !== false) {

			$data = explode("\n", $data);

		}

		if (!isset($data[$line])) {

			return $lines;

		}

		for ($i = $line - ($context + 1); $i < $line + $context; $i++) {

			if (!isset($data[$i])) {

				continue;

			}

			$string = str_replace(array("\r\n", "\n"), "", self::_highlight($data[$i]));

			if ($i == $line) {

				$lines[] = '<span class="code-highlight">' . $string . '</span>';

			} else {

				$lines[] = $string;

			}

		}

		return $lines;

	}

/**

 * Wraps the highlight_string function in case the server API does not

 * implement the function as it is the case of the HipHop interpreter

 *

 * @param string $str the string to convert

 * @return string

 */

	protected static function _highlight($str) {

		if (function_exists('hphp_log') || function_exists('hphp_gettid')) {

			return htmlentities($str);

		}

		$added = false;

		if (strpos($str, '<?php') === false) {

			$added = true;

			$str = "<?php \n" . $str;

		}

		$highlight = highlight_string($str, true);

		if ($added) {

			$highlight = str_replace(

				'&lt;?php&nbsp;<br />',

				'',

				$highlight

			);

		}

		return $highlight;

	}

/**

 * Converts a variable to a string for debug output.

 *

 * *Note:* The following keys will have their contents

 * replaced with `*****`:

 *

 *  - password

 *  - login

 *  - host

 *  - database

 *  - port

 *  - prefix

 *  - schema

 *

 * This is done to protect database credentials, which could be accidentally

 * shown in an error message if CakePHP is deployed in development mode.

 *

 * @param string $var Variable to convert

 * @param integer $depth The depth to output to. Defaults to 3.

 * @return string Variable as a formatted string

 * @link http://book.cakephp.org/2.0/en/development/debugging.html#Debugger::exportVar

 */

	public static function exportVar($var, $depth = 3) {

		return self::_export($var, $depth, 0);

	}

/**

 * Protected export function used to keep track of indentation and recursion.

 *

 * @param mixed $var The variable to dump.

 * @param integer $depth The remaining depth.

 * @param integer $indent The current indentation level.

 * @return string The dumped variable.

 */

	protected static function _export($var, $depth, $indent) {

		switch (self::getType($var)) {

			case 'boolean':

				return ($var) ? 'true' : 'false';

			case 'integer':

				return '(int) ' . $var;

			case 'float':

				return '(float) ' . $var;

			case 'string':

				if (trim($var) === '') {

					return "''";

				}

				return "'" . $var . "'";

			case 'array':

				return self::_array($var, $depth - 1, $indent + 1);

			case 'resource':

				return strtolower(gettype($var));

			case 'null':

				return 'null';

			case 'unknown':

				return 'unknown';

			default:

				return self::_object($var, $depth - 1, $indent + 1);

		}

	}

/**

 * Export an array type object. Filters out keys used in datasource configuration.

 *

 * The following keys are replaced with ***'s

 *

 * - password

 * - login

 * - host

 * - database

 * - port

 * - prefix

 * - schema

 *

 * @param array $var The array to export.

 * @param integer $depth The current depth, used for recursion tracking.

 * @param integer $indent The current indentation level.

 * @return string Exported array.

 */

	protected static function _array(array $var, $depth, $indent) {

		$secrets = array(

			'password' => '*****',

			'login' => '*****',

			'host' => '*****',

			'database' => '*****',

			'port' => '*****',

			'prefix' => '*****',

			'schema' => '*****'

		);

		$replace = array_intersect_key($secrets, $var);

		$var = $replace + $var;

		$out = "array(";

		$n = $break = $end = null;

		if (!empty($var)) {

			$n = "\n";

			$break = "\n" . str_repeat("\t", $indent);

			$end = "\n" . str_repeat("\t", $indent - 1);

		}

		$vars = array();

		if ($depth >= 0) {

			foreach ($var as $key => $val) {

				// Sniff for globals as !== explodes in < 5.4

				if ($key === 'GLOBALS' && is_array($val) && isset($val['GLOBALS'])) {

					$val = '[recursion]';

				} elseif ($val !== $var) {

					$val = self::_export($val, $depth, $indent);

				}

				$vars[] = $break . self::exportVar($key) .

					' => ' .

					$val;

			}

		} else {

			$vars[] = $break . '[maximum depth reached]';

		}

		return $out . implode(',', $vars) . $end . ')';

	}

/**

 * Handles object to string conversion.

 *

 * @param string $var Object to convert

 * @param integer $depth The current depth, used for tracking recursion.

 * @param integer $indent The current indentation level.

 * @return string

 * @see Debugger::exportVar()

 */

	protected static function _object($var, $depth, $indent) {

		$out = '';

		$props = array();

		$className = get_class($var);

		$out .= 'object(' . $className . ') {';

		if ($depth > 0) {

			$end = "\n" . str_repeat("\t", $indent - 1);

			$break = "\n" . str_repeat("\t", $indent);

			$objectVars = get_object_vars($var);

			foreach ($objectVars as $key => $value) {

				$value = self::_export($value, $depth - 1, $indent);

				$props[] = "$key => " . $value;

			}

			if (version_compare(PHP_VERSION, '5.3.0') >= 0) {

				$ref = new ReflectionObject($var);

				$filters = array(

					ReflectionProperty::IS_PROTECTED => 'protected',

					ReflectionProperty::IS_PRIVATE => 'private',

				);

				foreach ($filters as $filter => $visibility) {

					$reflectionProperties = $ref->getProperties($filter);

					foreach ($reflectionProperties as $reflectionProperty) {

						$reflectionProperty->setAccessible(true);

						$property = $reflectionProperty->getValue($var);

						$value = self::_export($property, $depth - 1, $indent);

						$key = $reflectionProperty->name;

						$props[] = sprintf('[%s] %s => %s', $visibility, $key, $value);

					}

				}

			}

			$out .= $break . implode($break, $props) . $end;

		}

		$out .= '}';

		return $out;

	}

/**

 * Get/Set the output format for Debugger error rendering.

 *

 * @param string $format The format you want errors to be output as.

 *   Leave null to get the current format.

 * @return mixed Returns null when setting. Returns the current format when getting.

 * @throws CakeException when choosing a format that doesn't exist.

 */

	public static function outputAs($format = null) {

		$self = Debugger::getInstance();

		if ($format === null) {

			return $self->_outputFormat;

		}

		if ($format !== false && !isset($self->_templates[$format])) {

			throw new CakeException(__d('cake_dev', 'Invalid Debugger output format.'));

		}

		$self->_outputFormat = $format;

	}

/**

 * Add an output format or update a format in Debugger.

 *

 * `Debugger::addFormat('custom', $data);`

 *

 * Where $data is an array of strings that use String::insert() variable

 * replacement. The template vars should be in a `{:id}` style.

 * An error formatter can have the following keys:

 *

 * - 'error' - Used for the container for the error message. Gets the following template

 *   variables: `id`, `error`, `code`, `description`, `path`, `line`, `links`, `info`

 * - 'info' - A combination of `code`, `context` and `trace`. Will be set with

 *   the contents of the other template keys.

 * - 'trace' - The container for a stack trace. Gets the following template

 *   variables: `trace`

 * - 'context' - The container element for the context variables.

 *   Gets the following templates: `id`, `context`

 * - 'links' - An array of HTML links that are used for creating links to other resources.

 *   Typically this is used to create javascript links to open other sections.

 *   Link keys, are: `code`, `context`, `help`. See the js output format for an

 *   example.

 * - 'traceLine' - Used for creating lines in the stacktrace. Gets the following

 *   template variables: `reference`, `path`, `line`

 *

 * Alternatively if you want to use a custom callback to do all the formatting, you can use

 * the callback key, and provide a callable:

 *

 * `Debugger::addFormat('custom', array('callback' => array($foo, 'outputError'));`

 *

 * The callback can expect two parameters. The first is an array of all

 * the error data. The second contains the formatted strings generated using

 * the other template strings. Keys like `info`, `links`, `code`, `context` and `trace`

 * will be present depending on the other templates in the format type.

 *

 * @param string $format Format to use, including 'js' for JavaScript-enhanced HTML, 'html' for

 *    straight HTML output, or 'txt' for unformatted text.

 * @param array $strings Template strings, or a callback to be used for the output format.

 * @return The resulting format string set.

 */

	public static function addFormat($format, array $strings) {

		$self = Debugger::getInstance();

		if (isset($self->_templates[$format])) {

			if (isset($strings['links'])) {

				$self->_templates[$format]['links'] = array_merge(

					$self->_templates[$format]['links'],

					$strings['links']

				);

				unset($strings['links']);

			}

			$self->_templates[$format] = array_merge($self->_templates[$format], $strings);

		} else {

			$self->_templates[$format] = $strings;

		}

		return $self->_templates[$format];

	}

/**

 * Switches output format, updates format strings.

 * Can be used to switch the active output format:

 *

 * @param string $format Format to use, including 'js' for JavaScript-enhanced HTML, 'html' for

 *    straight HTML output, or 'txt' for unformatted text.

 * @param array $strings Template strings to be used for the output format.

 * @return string

 * @deprecated Use Debugger::outputAs() and Debugger::addFormat(). Will be removed

 *   in 3.0

 */

	public function output($format = null, $strings = array()) {

		$self = Debugger::getInstance();

		$data = null;

		if ($format === null) {

			return Debugger::outputAs();

		}

		if (!empty($strings)) {

			return Debugger::addFormat($format, $strings);

		}

		if ($format === true && !empty($self->_data)) {

			$data = $self->_data;

			$self->_data = array();

			$format = false;

		}

		Debugger::outputAs($format);

		return $data;

	}

/**

 * Takes a processed array of data from an error and displays it in the chosen format.

 *

 * @param string $data

 * @return void

 */

	public function outputError($data) {

		$defaults = array(

			'level' => 0,

			'error' => 0,

			'code' => 0,

			'description' => '',

			'file' => '',

			'line' => 0,

			'context' => array(),

			'start' => 2,

		);

		$data += $defaults;

		$files = $this->trace(array('start' => $data['start'], 'format' => 'points'));

		$code = '';

		$file = null;

		if (isset($files[0]['file'])) {

			$file = $files[0];

		} elseif (isset($files[1]['file'])) {

			$file = $files[1];

		}

		if ($file) {

			$code = $this->excerpt($file['file'], $file['line'] - 1, 1);

		}

		$trace = $this->trace(array('start' => $data['start'], 'depth' => '20'));

		$insertOpts = array('before' => '{:', 'after' => '}');

		$context = array();

		$links = array();

		$info = '';

		foreach ((array)$data['context'] as $var => $value) {

			$context[] = "\${$var} = " . $this->exportVar($value, 3);

		}

		switch ($this->_outputFormat) {

			case false:

				$this->_data[] = compact('context', 'trace') + $data;

				return;

			case 'log':

				$this->log(compact('context', 'trace') + $data);

				return;

		}

		$data['trace'] = $trace;

		$data['id'] = 'cakeErr' . uniqid();

		$tpl = array_merge($this->_templates['base'], $this->_templates[$this->_outputFormat]);

		if (isset($tpl['links'])) {

			foreach ($tpl['links'] as $key => $val) {

				$links[$key] = String::insert($val, $data, $insertOpts);

			}

		}

		if (!empty($tpl['escapeContext'])) {

			$context = h($context);

		}

		$infoData = compact('code', 'context', 'trace');

		foreach ($infoData as $key => $value) {

			if (empty($value) || !isset($tpl[$key])) {

				continue;

			}

			if (is_array($value)) {

				$value = implode("\n", $value);

			}

			$info .= String::insert($tpl[$key], array($key => $value) + $data, $insertOpts);

		}

		$links = implode(' ', $links);

		if (isset($tpl['callback']) && is_callable($tpl['callback'])) {

			return call_user_func($tpl['callback'], $data, compact('links', 'info'));

		}

		echo String::insert($tpl['error'], compact('links', 'info') + $data, $insertOpts);

	}

/**

 * Get the type of the given variable. Will return the class name

 * for objects.

 *

 * @param mixed $var The variable to get the type of

 * @return string The type of variable.

 */

	public static function getType($var) {

		if (is_object($var)) {

			return get_class($var);

		}

		if ($var === null) {

			return 'null';

		}

		if (is_string($var)) {

			return 'string';

		}

		if (is_array($var)) {

			return 'array';

		}

		if (is_int($var)) {

			return 'integer';

		}

		if (is_bool($var)) {

			return 'boolean';

		}

		if (is_float($var)) {

			return 'float';

		}

		if (is_resource($var)) {

			return 'resource';

		}

		return 'unknown';

	}

/**

 * Verifies that the application's salt and cipher seed value has been changed from the default value.

 *

 * @return void

 */

	public static function checkSecurityKeys() {

		if (Configure::read('Security.salt') === 'DYhG93b0qyJfIxfs2guVoUubWwvniR2G0FgaC9mi') {

			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);

		}

		if (Configure::read('Security.cipherSeed') === '76859309657453542496749683645') {

			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);

		}

	}

}