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<?php
/**
* Error Stack Implementation
*
* This is an incredibly simple implementation of a very complex error handling
* facility. It contains the ability
* to track multiple errors from multiple packages simultaneously. In addition,
* it can track errors of many levels, save data along with the error, context
* information such as the exact file, line number, class and function that
* generated the error, and if necessary, it can raise a traditional PEAR_Error.
* It has built-in support for PEAR::Log, to log errors as they occur
*
* Since version 0.2alpha, it is also possible to selectively ignore errors,
* through the use of an error callback, see {@link pushCallback()}
*
* Since version 0.3alpha, it is possible to specify the exception class
* returned from {@link push()}
*
* Since version PEAR1.3.2, ErrorStack no longer instantiates an exception class. This can
* still be done quite handily in an error callback or by manipulating the returned array
* @category Debugging
* @package PEAR_ErrorStack
* @author Greg Beaver <cellog@php.net>
* @copyright 2004-2008 Greg Beaver
* @license http://opensource.org/licenses/bsd-license.php New BSD License
* @link http://pear.php.net/package/PEAR_ErrorStack
*/
/**
* Singleton storage
*
* Format:
* <pre>
* array(
* 'package1' => PEAR_ErrorStack object,
* 'package2' => PEAR_ErrorStack object,
* ...
* )
* </pre>
* @access private
* @global array $GLOBALS['_PEAR_ERRORSTACK_SINGLETON']
*/
$GLOBALS['_PEAR_ERRORSTACK_SINGLETON'] = array();
/**
* Global error callback (default)
*
* This is only used if set to non-false. * is the default callback for
* all packages, whereas specific packages may set a default callback
* for all instances, regardless of whether they are a singleton or not.
*
* To exclude non-singletons, only set the local callback for the singleton
* @see PEAR_ErrorStack::setDefaultCallback()
* @access private
* @global array $GLOBALS['_PEAR_ERRORSTACK_DEFAULT_CALLBACK']
*/
$GLOBALS['_PEAR_ERRORSTACK_DEFAULT_CALLBACK'] = array(
'*' => false,
);
/**
* Global Log object (default)
*
* This is only used if set to non-false. Use to set a default log object for
* all stacks, regardless of instantiation order or location
* @see PEAR_ErrorStack::setDefaultLogger()
* @access private
* @global array $GLOBALS['_PEAR_ERRORSTACK_DEFAULT_LOGGER']
*/
$GLOBALS['_PEAR_ERRORSTACK_DEFAULT_LOGGER'] = false;
/**
* Global Overriding Callback
*
* This callback will override any error callbacks that specific loggers have set.
* Use with EXTREME caution
* @see PEAR_ErrorStack::staticPushCallback()
* @access private
* @global array $GLOBALS['_PEAR_ERRORSTACK_DEFAULT_LOGGER']
*/
$GLOBALS['_PEAR_ERRORSTACK_OVERRIDE_CALLBACK'] = array();
/**#@+
* One of four possible return values from the error Callback
* @see PEAR_ErrorStack::_errorCallback()
*/
/**
* If this is returned, then the error will be both pushed onto the stack
* and logged.
*/
define('PEAR_ERRORSTACK_PUSHANDLOG', 1);
/**
* If this is returned, then the error will only be pushed onto the stack,
* and not logged.
*/
define('PEAR_ERRORSTACK_PUSH', 2);
/**
* If this is returned, then the error will only be logged, but not pushed
* onto the error stack.
*/
define('PEAR_ERRORSTACK_LOG', 3);
/**
* If this is returned, then the error is completely ignored.
*/
define('PEAR_ERRORSTACK_IGNORE', 4);
/**
* If this is returned, then the error is logged and die() is called.
*/
define('PEAR_ERRORSTACK_DIE', 5);
/**#@-*/
/**
* Error code for an attempt to instantiate a non-class as a PEAR_ErrorStack in
* the singleton method.
*/
define('PEAR_ERRORSTACK_ERR_NONCLASS', 1);
/**
* Error code for an attempt to pass an object into {@link PEAR_ErrorStack::getMessage()}
* that has no __toString() method
*/
define('PEAR_ERRORSTACK_ERR_OBJTOSTRING', 2);
/**
* Error Stack Implementation
*
* Usage:
* <code>
* // global error stack
* $global_stack = &PEAR_ErrorStack::singleton('MyPackage');
* // local error stack
* $local_stack = new PEAR_ErrorStack('MyPackage');
* </code>
* @author Greg Beaver <cellog@php.net>
* @version 1.10.16
* @package PEAR_ErrorStack
* @category Debugging
* @copyright 2004-2008 Greg Beaver
* @license http://opensource.org/licenses/bsd-license.php New BSD License
* @link http://pear.php.net/package/PEAR_ErrorStack
*/
class PEAR_ErrorStack {
/**
* Errors are stored in the order that they are pushed on the stack.
* @since 0.4alpha Errors are no longer organized by error level.
* This renders pop() nearly unusable, and levels could be more easily
* handled in a callback anyway
* @var array
* @access private
*/
var $_errors = array();
/**
* Storage of errors by level.
*
* Allows easy retrieval and deletion of only errors from a particular level
* @since PEAR 1.4.0dev
* @var array
* @access private
*/
var $_errorsByLevel = array();
/**
* Package name this error stack represents
* @var string
* @access protected
*/
var $_package;
/**
* Determines whether a PEAR_Error is thrown upon every error addition
* @var boolean
* @access private
*/
var $_compat = false;
/**
* If set to a valid callback, this will be used to generate the error
* message from the error code, otherwise the message passed in will be
* used
* @var false|string|array
* @access private
*/
var $_msgCallback = false;
/**
* If set to a valid callback, this will be used to generate the error
* context for an error. For PHP-related errors, this will be a file
* and line number as retrieved from debug_backtrace(), but can be
* customized for other purposes. The error might actually be in a separate
* configuration file, or in a database query.
* @var false|string|array
* @access protected
*/
var $_contextCallback = false;
/**
* If set to a valid callback, this will be called every time an error
* is pushed onto the stack. The return value will be used to determine
* whether to allow an error to be pushed or logged.
*
* The return value must be one an PEAR_ERRORSTACK_* constant
* @see PEAR_ERRORSTACK_PUSHANDLOG, PEAR_ERRORSTACK_PUSH, PEAR_ERRORSTACK_LOG
* @var false|string|array
* @access protected
*/
var $_errorCallback = array();
/**
* PEAR::Log object for logging errors
* @var false|Log
* @access protected
*/
var $_logger = false;
/**
* Error messages - designed to be overridden
* @var array
* @abstract
*/
var $_errorMsgs = array();
/**
* Set up a new error stack
*
* @param string $package name of the package this error stack represents
* @param callback $msgCallback callback used for error message generation
* @param callback $contextCallback callback used for context generation,
* defaults to {@link getFileLine()}
* @param boolean $throwPEAR_Error
*/
function __construct($package, $msgCallback = false, $contextCallback = false,
$throwPEAR_Error = false)
{
$this->_package = $package;
$this->setMessageCallback($msgCallback);
$this->setContextCallback($contextCallback);
$this->_compat = $throwPEAR_Error;
}
/**
* Return a single error stack for this package.
*
* Note that all parameters are ignored if the stack for package $package
* has already been instantiated
* @param string $package name of the package this error stack represents
* @param callback $msgCallback callback used for error message generation
* @param callback $contextCallback callback used for context generation,
* defaults to {@link getFileLine()}
* @param boolean $throwPEAR_Error
* @param string $stackClass class to instantiate
*
* @return PEAR_ErrorStack
*/
public static function &singleton(
$package, $msgCallback = false, $contextCallback = false,
$throwPEAR_Error = false, $stackClass = 'PEAR_ErrorStack'
) {
if (isset($GLOBALS['_PEAR_ERRORSTACK_SINGLETON'][$package])) {
return $GLOBALS['_PEAR_ERRORSTACK_SINGLETON'][$package];
}
if (!class_exists($stackClass)) {
if (function_exists('debug_backtrace')) {
$trace = debug_backtrace();
}
PEAR_ErrorStack::staticPush('PEAR_ErrorStack', PEAR_ERRORSTACK_ERR_NONCLASS,
'exception', array('stackclass' => $stackClass),
'stack class "%stackclass%" is not a valid class name (should be like PEAR_ErrorStack)',
false, $trace);
}
$GLOBALS['_PEAR_ERRORSTACK_SINGLETON'][$package] =
new $stackClass($package, $msgCallback, $contextCallback, $throwPEAR_Error);
return $GLOBALS['_PEAR_ERRORSTACK_SINGLETON'][$package];
}
/**
* Internal error handler for PEAR_ErrorStack class
*
* Dies if the error is an exception (and would have died anyway)
* @access private
*/
function _handleError($err)
{
if ($err['level'] == 'exception') {
$message = $err['message'];
if (isset($_SERVER['REQUEST_URI'])) {
echo '<br />';
} else {
echo "\n";
}
var_dump($err['context']);
die($message);
}
}
/**
* Set up a PEAR::Log object for all error stacks that don't have one
* @param Log $log
*/
public static function setDefaultLogger(&$log)
{
if (is_object($log) && method_exists($log, 'log') ) {
$GLOBALS['_PEAR_ERRORSTACK_DEFAULT_LOGGER'] = &$log;
} elseif (is_callable($log)) {
$GLOBALS['_PEAR_ERRORSTACK_DEFAULT_LOGGER'] = &$log;
}
}
/**
* Set up a PEAR::Log object for this error stack
* @param Log $log
*/
function setLogger(&$log)
{
if (is_object($log) && method_exists($log, 'log') ) {
$this->_logger = &$log;
} elseif (is_callable($log)) {
$this->_logger = &$log;
}
}
/**
* Set an error code => error message mapping callback
*
* This method sets the callback that can be used to generate error
* messages for any instance
* @param array|string Callback function/method
*/
function setMessageCallback($msgCallback)
{
if (!$msgCallback) {
$this->_msgCallback = array(&$this, 'getErrorMessage');
} else {
if (is_callable($msgCallback)) {
$this->_msgCallback = $msgCallback;
}
}
}
/**
* Get an error code => error message mapping callback
*
* This method returns the current callback that can be used to generate error
* messages
* @return array|string|false Callback function/method or false if none
*/
function getMessageCallback()
{
return $this->_msgCallback;
}
/**
* Sets a default callback to be used by all error stacks
*
* This method sets the callback that can be used to generate error
* messages for a singleton
* @param array|string Callback function/method
* @param string Package name, or false for all packages
*/
public static function setDefaultCallback($callback = false, $package = false)
{
if (!is_callable($callback)) {
$callback = false;
}
$package = $package ? $package : '*';
$GLOBALS['_PEAR_ERRORSTACK_DEFAULT_CALLBACK'][$package] = $callback;
}
/**
* Set a callback that generates context information (location of error) for an error stack
*
* This method sets the callback that can be used to generate context
* information for an error. Passing in NULL will disable context generation
* and remove the expensive call to debug_backtrace()
* @param array|string|null Callback function/method
*/
function setContextCallback($contextCallback)
{
if ($contextCallback === null) {
return $this->_contextCallback = false;
}
if (!$contextCallback) {
$this->_contextCallback = array(&$this, 'getFileLine');
} else {
if (is_callable($contextCallback)) {
$this->_contextCallback = $contextCallback;
}
}
}
/**
* Set an error Callback
* If set to a valid callback, this will be called every time an error
* is pushed onto the stack. The return value will be used to determine
* whether to allow an error to be pushed or logged.
*
* The return value must be one of the ERRORSTACK_* constants.
*
* This functionality can be used to emulate PEAR's pushErrorHandling, and
* the PEAR_ERROR_CALLBACK mode, without affecting the integrity of
* the error stack or logging
* @see PEAR_ERRORSTACK_PUSHANDLOG, PEAR_ERRORSTACK_PUSH, PEAR_ERRORSTACK_LOG
* @see popCallback()
* @param string|array $cb
*/
function pushCallback($cb)
{
array_push($this->_errorCallback, $cb);
}
/**
* Remove a callback from the error callback stack
* @see pushCallback()
* @return array|string|false
*/
function popCallback()
{
if (!count($this->_errorCallback)) {
return false;
}
return array_pop($this->_errorCallback);
}
/**
* Set a temporary overriding error callback for every package error stack
*
* Use this to temporarily disable all existing callbacks (can be used
* to emulate the @ operator, for instance)
* @see PEAR_ERRORSTACK_PUSHANDLOG, PEAR_ERRORSTACK_PUSH, PEAR_ERRORSTACK_LOG
* @see staticPopCallback(), pushCallback()
* @param string|array $cb
*/
public static function staticPushCallback($cb)
{
array_push($GLOBALS['_PEAR_ERRORSTACK_OVERRIDE_CALLBACK'], $cb);
}
/**
* Remove a temporary overriding error callback
* @see staticPushCallback()
* @return array|string|false
*/
public static function staticPopCallback()
{
$ret = array_pop($GLOBALS['_PEAR_ERRORSTACK_OVERRIDE_CALLBACK']);
if (!is_array($GLOBALS['_PEAR_ERRORSTACK_OVERRIDE_CALLBACK'])) {
$GLOBALS['_PEAR_ERRORSTACK_OVERRIDE_CALLBACK'] = array();
}
return $ret;
}
/**
* Add an error to the stack
*
* If the message generator exists, it is called with 2 parameters.
* - the current Error Stack object
* - an array that is in the same format as an error. Available indices
* are 'code', 'package', 'time', 'params', 'level', and 'context'
*
* Next, if the error should contain context information, this is
* handled by the context grabbing method.
* Finally, the error is pushed onto the proper error stack
* @param int $code Package-specific error code
* @param string $level Error level. This is NOT spell-checked
* @param array $params associative array of error parameters
* @param string $msg Error message, or a portion of it if the message
* is to be generated
* @param array $repackage If this error re-packages an error pushed by
* another package, place the array returned from
* {@link pop()} in this parameter
* @param array $backtrace Protected parameter: use this to pass in the
* {@link debug_backtrace()} that should be used
* to find error context
* @return PEAR_Error|array if compatibility mode is on, a PEAR_Error is also
* thrown. If a PEAR_Error is returned, the userinfo
* property is set to the following array:
*
* <code>
* array(
* 'code' => $code,
* 'params' => $params,
* 'package' => $this->_package,
* 'level' => $level,
* 'time' => time(),
* 'context' => $context,
* 'message' => $msg,
* //['repackage' => $err] repackaged error array/Exception class
* );
* </code>
*
* Normally, the previous array is returned.
*/
function push($code, $level = 'error', $params = array(), $msg = false,
$repackage = false, $backtrace = false)
{
$context = false;
// grab error context
if ($this->_contextCallback) {
if (!$backtrace) {
$backtrace = debug_backtrace();
}
$context = call_user_func($this->_contextCallback, $code, $params, $backtrace);
}
// save error
$time = explode(' ', microtime());
$time = $time[1] + $time[0];
$err = array(
'code' => $code,
'params' => $params,
'package' => $this->_package,
'level' => $level,
'time' => $time,
'context' => $context,
'message' => $msg,
);
if ($repackage) {
$err['repackage'] = $repackage;
}
// set up the error message, if necessary
if ($this->_msgCallback) {
$msg = call_user_func_array($this->_msgCallback,
array(&$this, $err));
$err['message'] = $msg;
}
$push = $log = true;
$die = false;
// try the overriding callback first
$callback = $this->staticPopCallback();
if ($callback) {
$this->staticPushCallback($callback);
}
if (!is_callable($callback)) {
// try the local callback next
$callback = $this->popCallback();
if (is_callable($callback)) {
$this->pushCallback($callback);
} else {
// try the default callback
$callback = isset($GLOBALS['_PEAR_ERRORSTACK_DEFAULT_CALLBACK'][$this->_package]) ?
$GLOBALS['_PEAR_ERRORSTACK_DEFAULT_CALLBACK'][$this->_package] :
$GLOBALS['_PEAR_ERRORSTACK_DEFAULT_CALLBACK']['*'];
}
}
if (is_callable($callback)) {
switch(call_user_func($callback, $err)){
case PEAR_ERRORSTACK_IGNORE:
return $err;
break;
case PEAR_ERRORSTACK_PUSH:
$log = false;
break;
case PEAR_ERRORSTACK_LOG:
$push = false;
break;
case PEAR_ERRORSTACK_DIE:
$die = true;
break;
// anything else returned has the same effect as pushandlog
}
}
if ($push) {
array_unshift($this->_errors, $err);
if (!isset($this->_errorsByLevel[$err['level']])) {
$this->_errorsByLevel[$err['level']] = array();
}
$this->_errorsByLevel[$err['level']][] = &$this->_errors[0];
}
if ($log) {
if ($this->_logger || $GLOBALS['_PEAR_ERRORSTACK_DEFAULT_LOGGER']) {
$this->_log($err);
}
}
if ($die) {
die();
}
if ($this->_compat && $push) {
return $this->raiseError($msg, $code, null, null, $err);
}
return $err;
}
/**
* Static version of {@link push()}
*
* @param string $package Package name this error belongs to
* @param int $code Package-specific error code
* @param string $level Error level. This is NOT spell-checked
* @param array $params associative array of error parameters
* @param string $msg Error message, or a portion of it if the message
* is to be generated
* @param array $repackage If this error re-packages an error pushed by
* another package, place the array returned from
* {@link pop()} in this parameter
* @param array $backtrace Protected parameter: use this to pass in the
* {@link debug_backtrace()} that should be used
* to find error context
* @return PEAR_Error|array if compatibility mode is on, a PEAR_Error is also
* thrown. see docs for {@link push()}
*/
public static function staticPush(
$package, $code, $level = 'error', $params = array(),
$msg = false, $repackage = false, $backtrace = false
) {
$s = &PEAR_ErrorStack::singleton($package);
if ($s->_contextCallback) {
if (!$backtrace) {
if (function_exists('debug_backtrace')) {
$backtrace = debug_backtrace();
}
}
}
return $s->push($code, $level, $params, $msg, $repackage, $backtrace);
}
/**
* Log an error using PEAR::Log
* @param array $err Error array
* @param array $levels Error level => Log constant map
* @access protected
*/
function _log($err)
{
if ($this->_logger) {
$logger = &$this->_logger;
} else {
$logger = &$GLOBALS['_PEAR_ERRORSTACK_DEFAULT_LOGGER'];
}
if (is_a($logger, 'Log')) {
$levels = array(
'exception' => PEAR_LOG_CRIT,
'alert' => PEAR_LOG_ALERT,
'critical' => PEAR_LOG_CRIT,
'error' => PEAR_LOG_ERR,
'warning' => PEAR_LOG_WARNING,
'notice' => PEAR_LOG_NOTICE,
'info' => PEAR_LOG_INFO,
'debug' => PEAR_LOG_DEBUG);
if (isset($levels[$err['level']])) {
$level = $levels[$err['level']];
} else {
$level = PEAR_LOG_INFO;
}
$logger->log($err['message'], $level, $err);
} else { // support non-standard logs
call_user_func($logger, $err);
}
}
/**
* Pop an error off of the error stack
*
* @return false|array
* @since 0.4alpha it is no longer possible to specify a specific error
* level to return - the last error pushed will be returned, instead
*/
function pop()
{
$err = @array_shift($this->_errors);
if (!is_null($err)) {
@array_pop($this->_errorsByLevel[$err['level']]);
if (!count($this->_errorsByLevel[$err['level']])) {
unset($this->_errorsByLevel[$err['level']]);
}
}
return $err;
}
/**
* Pop an error off of the error stack, static method
*
* @param string package name
* @return boolean
* @since PEAR1.5.0a1
*/
static function staticPop($package)
{
if ($package) {
if (!isset($GLOBALS['_PEAR_ERRORSTACK_SINGLETON'][$package])) {
return false;
}
return $GLOBALS['_PEAR_ERRORSTACK_SINGLETON'][$package]->pop();
}
}
/**
* Determine whether there are any errors on the stack
* @param string|array Level name. Use to determine if any errors
* of level (string), or levels (array) have been pushed
* @return boolean
*/
function hasErrors($level = false)
{
if ($level) {
return isset($this->_errorsByLevel[$level]);
}
return count($this->_errors);
}
/**
* Retrieve all errors since last purge
*
* @param boolean set in order to empty the error stack
* @param string level name, to return only errors of a particular severity
* @return array
*/
function getErrors($purge = false, $level = false)
{
if (!$purge) {
if ($level) {
if (!isset($this->_errorsByLevel[$level])) {
return array();
} else {
return $this->_errorsByLevel[$level];
}
} else {
return $this->_errors;
}
}
if ($level) {
$ret = $this->_errorsByLevel[$level];
foreach ($this->_errorsByLevel[$level] as $i => $unused) {
// entries are references to the $_errors array
$this->_errorsByLevel[$level][$i] = false;
}
// array_filter removes all entries === false
$this->_errors = array_filter($this->_errors);
unset($this->_errorsByLevel[$level]);
return $ret;
}
$ret = $this->_errors;
$this->_errors = array();
$this->_errorsByLevel = array();
return $ret;
}
/**
* Determine whether there are any errors on a single error stack, or on any error stack
*
* The optional parameter can be used to test the existence of any errors without the need of
* singleton instantiation
* @param string|false Package name to check for errors
* @param string Level name to check for a particular severity
* @return boolean
*/
public static function staticHasErrors($package = false, $level = false)
{
if ($package) {
if (!isset($GLOBALS['_PEAR_ERRORSTACK_SINGLETON'][$package])) {
return false;
}
return $GLOBALS['_PEAR_ERRORSTACK_SINGLETON'][$package]->hasErrors($level);
}
foreach ($GLOBALS['_PEAR_ERRORSTACK_SINGLETON'] as $package => $obj) {
if ($obj->hasErrors($level)) {
return true;
}
}
return false;
}
/**
* Get a list of all errors since last purge, organized by package
* @since PEAR 1.4.0dev BC break! $level is now in the place $merge used to be
* @param boolean $purge Set to purge the error stack of existing errors
* @param string $level Set to a level name in order to retrieve only errors of a particular level
* @param boolean $merge Set to return a flat array, not organized by package
* @param array $sortfunc Function used to sort a merged array - default
* sorts by time, and should be good for most cases
*
* @return array
*/
public static function staticGetErrors(
$purge = false, $level = false, $merge = false,
$sortfunc = array('PEAR_ErrorStack', '_sortErrors')
) {
$ret = array();
if (!is_callable($sortfunc)) {
$sortfunc = array('PEAR_ErrorStack', '_sortErrors');
}
foreach ($GLOBALS['_PEAR_ERRORSTACK_SINGLETON'] as $package => $obj) {
$test = $GLOBALS['_PEAR_ERRORSTACK_SINGLETON'][$package]->getErrors($purge, $level);
if ($test) {
if ($merge) {
$ret = array_merge($ret, $test);
} else {
$ret[$package] = $test;
}
}
}
if ($merge) {
usort($ret, $sortfunc);
}
return $ret;
}
/**
* Error sorting function, sorts by time
* @access private
*/
public static function _sortErrors($a, $b)
{
if ($a['time'] == $b['time']) {
return 0;
}
if ($a['time'] < $b['time']) {
return 1;
}
return -1;
}
/**
* Standard file/line number/function/class context callback
*
* This function uses a backtrace generated from {@link debug_backtrace()}
* and so will not work at all in PHP < 4.3.0. The frame should
* reference the frame that contains the source of the error.
* @return array|false either array('file' => file, 'line' => line,
* 'function' => function name, 'class' => class name) or
* if this doesn't work, then false
* @param unused
* @param integer backtrace frame.
* @param array Results of debug_backtrace()
*/
public static function getFileLine($code, $params, $backtrace = null)
{
if ($backtrace === null) {
return false;
}
$frame = 0;
$functionframe = 1;
if (!isset($backtrace[1])) {
$functionframe = 0;
} else {
while (isset($backtrace[$functionframe]['function']) &&
$backtrace[$functionframe]['function'] == 'eval' &&
isset($backtrace[$functionframe + 1])) {
$functionframe++;
}
}
if (isset($backtrace[$frame])) {
if (!isset($backtrace[$frame]['file'])) {
$frame++;
}
$funcbacktrace = $backtrace[$functionframe];
$filebacktrace = $backtrace[$frame];
$ret = array('file' => $filebacktrace['file'],
'line' => $filebacktrace['line']);
// rearrange for eval'd code or create function errors
if (strpos($filebacktrace['file'], '(') &&
preg_match(';^(.*?)\((\d+)\) : (.*?)\\z;', $filebacktrace['file'],
$matches)) {
$ret['file'] = $matches[1];
$ret['line'] = $matches[2] + 0;
}
if (isset($funcbacktrace['function']) && isset($backtrace[1])) {
if ($funcbacktrace['function'] != 'eval') {
if ($funcbacktrace['function'] == '__lambda_func') {
$ret['function'] = 'create_function() code';
} else {
$ret['function'] = $funcbacktrace['function'];
}
}
}
if (isset($funcbacktrace['class']) && isset($backtrace[1])) {
$ret['class'] = $funcbacktrace['class'];
}
return $ret;
}
return false;
}
/**
* Standard error message generation callback
*
* This method may also be called by a custom error message generator
* to fill in template values from the params array, simply
* set the third parameter to the error message template string to use
*
* The special variable %__msg% is reserved: use it only to specify
* where a message passed in by the user should be placed in the template,
* like so:
*
* Error message: %msg% - internal error
*
* If the message passed like so:
*
* <code>
* $stack->push(ERROR_CODE, 'error', array(), 'server error 500');
* </code>
*
* The returned error message will be "Error message: server error 500 -
* internal error"
* @param PEAR_ErrorStack
* @param array
* @param string|false Pre-generated error message template
*
* @return string
*/
public static function getErrorMessage(&$stack, $err, $template = false)
{
if ($template) {
$mainmsg = $template;
} else {
$mainmsg = $stack->getErrorMessageTemplate($err['code']);
}
$mainmsg = str_replace('%__msg%', $err['message'], $mainmsg);
if (is_array($err['params']) && count($err['params'])) {
foreach ($err['params'] as $name => $val) {
if (is_array($val)) {
// @ is needed in case $val is a multi-dimensional array
$val = @implode(', ', $val);
}
if (is_object($val)) {
if (method_exists($val, '__toString')) {
$val = $val->__toString();
} else {
PEAR_ErrorStack::staticPush('PEAR_ErrorStack', PEAR_ERRORSTACK_ERR_OBJTOSTRING,
'warning', array('obj' => get_class($val)),
'object %obj% passed into getErrorMessage, but has no __toString() method');
$val = 'Object';
}
}
$mainmsg = str_replace('%' . $name . '%', $val, $mainmsg);
}
}
return $mainmsg;
}
/**
* Standard Error Message Template generator from code
* @return string
*/
function getErrorMessageTemplate($code)
{
if (!isset($this->_errorMsgs[$code])) {
return '%__msg%';
}
return $this->_errorMsgs[$code];
}
/**
* Set the Error Message Template array
*
* The array format must be:
* <pre>
* array(error code => 'message template',...)
* </pre>
*
* Error message parameters passed into {@link push()} will be used as input
* for the error message. If the template is 'message %foo% was %bar%', and the
* parameters are array('foo' => 'one', 'bar' => 'six'), the error message returned will
* be 'message one was six'
* @return string
*/
function setErrorMessageTemplate($template)
{
$this->_errorMsgs = $template;
}
/**
* emulate PEAR::raiseError()
*
* @return PEAR_Error
*/
function raiseError()
{
require_once 'PEAR.php';
$args = func_get_args();
return call_user_func_array(array('PEAR', 'raiseError'), $args);
}
}
$stack = &PEAR_ErrorStack::singleton('PEAR_ErrorStack');
$stack->pushCallback(array('PEAR_ErrorStack', '_handleError'));
?>