2 /* vim: set expandtab tabstop=4 shiftwidth=4 foldmethod=marker: */
10 * @author Tomas V. V. Cox <cox@idecnet.com>
11 * @author Hans Lellelid <hans@velum.net>
12 * @author Bertrand Mansion <bmansion@mamasam.com>
13 * @author Greg Beaver <cellog@php.net>
14 * @copyright 1997-2009 The Authors
15 * @license http://opensource.org/licenses/bsd-license.php New BSD License
16 * @version CVS: $Id: Exception.php 307683 2011-01-23 21:56:12Z dufuz $
17 * @link http://pear.php.net/package/PEAR
18 * @since File available since Release 1.3.3
23 * Base PEAR_Exception Class
27 * - Nestable exceptions (throw new PEAR_Exception($msg, $prev_exception))
28 * - Definable triggers, shot when exceptions occur
29 * - Pretty and informative error messages
30 * - Added more context info available (like class, method or cause)
31 * - cause can be a PEAR_Exception or an array of mixed
32 * PEAR_Exceptions/PEAR_ErrorStack warnings
33 * - callbacks for specific exception classes and their children
37 * - Maybe a way to define a 'template' for the output
39 * 3) Inherited properties from PHP Exception Class:
47 * 4) Inherited methods from PHP Exception Class:
56 * getTraceSafeAsString
62 * require_once 'PEAR/Exception.php';
66 * throw new PEAR_Exception('Error Message', ERROR_CODE);
70 * function myLogger($pear_exception) {
71 * echo $pear_exception->getMessage();
73 * // each time a exception is thrown the 'myLogger' will be called
74 * // (its use is completely optional)
75 * PEAR_Exception::addObserver('myLogger');
79 * } catch (PEAR_Exception $e) {
86 * @author Tomas V.V.Cox <cox@idecnet.com>
87 * @author Hans Lellelid <hans@velum.net>
88 * @author Bertrand Mansion <bmansion@mamasam.com>
89 * @author Greg Beaver <cellog@php.net>
90 * @copyright 1997-2009 The Authors
91 * @license http://opensource.org/licenses/bsd-license.php New BSD License
92 * @version Release: 1.9.2
93 * @link http://pear.php.net/package/PEAR
94 * @since Class available since Release 1.3.3
97 class PEAR_Exception extends Exception
99 const OBSERVER_PRINT = -2;
100 const OBSERVER_TRIGGER = -4;
101 const OBSERVER_DIE = -8;
103 private static $_observers = array();
104 private static $_uniqueid = 0;
108 * Supported signatures:
109 * - PEAR_Exception(string $message);
110 * - PEAR_Exception(string $message, int $code);
111 * - PEAR_Exception(string $message, Exception $cause);
112 * - PEAR_Exception(string $message, Exception $cause, int $code);
113 * - PEAR_Exception(string $message, PEAR_Error $cause);
114 * - PEAR_Exception(string $message, PEAR_Error $cause, int $code);
115 * - PEAR_Exception(string $message, array $causes);
116 * - PEAR_Exception(string $message, array $causes, int $code);
117 * @param string exception message
118 * @param int|Exception|PEAR_Error|array|null exception cause
119 * @param int|null exception code or null
121 public function __construct($message, $p2 = null, $p3 = null)
126 } elseif (is_object($p2) || is_array($p2)) {
127 // using is_object allows both Exception and PEAR_Error
128 if (is_object($p2) && !($p2 instanceof Exception)) {
129 if (!class_exists('PEAR_Error') || !($p2 instanceof PEAR_Error)) {
130 throw new PEAR_Exception('exception cause must be Exception, ' .
131 'array, or PEAR_Error');
135 if (is_array($p2) && isset($p2['message'])) {
136 // fix potential problem of passing in a single warning
144 parent::__construct($message, $code);
149 * @param mixed $callback - A valid php callback, see php func is_callable()
150 * - A PEAR_Exception::OBSERVER_* constant
151 * - An array(const PEAR_Exception::OBSERVER_*,
153 * @param string $label The name of the observer. Use this if you want
154 * to remove it later with removeObserver()
156 public static function addObserver($callback, $label = 'default')
158 self::$_observers[$label] = $callback;
161 public static function removeObserver($label = 'default')
163 unset(self::$_observers[$label]);
167 * @return int unique identifier for an observer
169 public static function getUniqueId()
171 return self::$_uniqueid++;
174 private function signal()
176 foreach (self::$_observers as $func) {
177 if (is_callable($func)) {
178 call_user_func($func, $this);
181 settype($func, 'array');
183 case self::OBSERVER_PRINT :
184 $f = (isset($func[1])) ? $func[1] : '%s';
185 printf($f, $this->getMessage());
187 case self::OBSERVER_TRIGGER :
188 $f = (isset($func[1])) ? $func[1] : E_USER_NOTICE;
189 trigger_error($this->getMessage(), $f);
191 case self::OBSERVER_DIE :
192 $f = (isset($func[1])) ? $func[1] : '%s';
193 die(printf($f, $this->getMessage()));
196 trigger_error('invalid observer type', E_USER_WARNING);
202 * Return specific error information that can be used for more detailed
203 * error messages or translation.
205 * This method may be overridden in child exception classes in order
206 * to add functionality not present in PEAR_Exception and is a placeholder
209 * The returned array must be an associative array of parameter => value like so:
211 * array('name' => $name, 'context' => array(...))
215 public function getErrorData()
221 * Returns the exception that caused this exception to be thrown
223 * @return Exception|array The context of the exception
225 public function getCause()
231 * Function must be public to call on caused exceptions
234 public function getCauseMessage(&$causes)
236 $trace = $this->getTraceSafe();
237 $cause = array('class' => get_class($this),
238 'message' => $this->message,
240 'line' => 'unknown');
241 if (isset($trace[0])) {
242 if (isset($trace[0]['file'])) {
243 $cause['file'] = $trace[0]['file'];
244 $cause['line'] = $trace[0]['line'];
248 if ($this->cause instanceof PEAR_Exception) {
249 $this->cause->getCauseMessage($causes);
250 } elseif ($this->cause instanceof Exception) {
251 $causes[] = array('class' => get_class($this->cause),
252 'message' => $this->cause->getMessage(),
253 'file' => $this->cause->getFile(),
254 'line' => $this->cause->getLine());
255 } elseif (class_exists('PEAR_Error') && $this->cause instanceof PEAR_Error) {
256 $causes[] = array('class' => get_class($this->cause),
257 'message' => $this->cause->getMessage(),
259 'line' => 'unknown');
260 } elseif (is_array($this->cause)) {
261 foreach ($this->cause as $cause) {
262 if ($cause instanceof PEAR_Exception) {
263 $cause->getCauseMessage($causes);
264 } elseif ($cause instanceof Exception) {
265 $causes[] = array('class' => get_class($cause),
266 'message' => $cause->getMessage(),
267 'file' => $cause->getFile(),
268 'line' => $cause->getLine());
269 } elseif (class_exists('PEAR_Error') && $cause instanceof PEAR_Error) {
270 $causes[] = array('class' => get_class($cause),
271 'message' => $cause->getMessage(),
273 'line' => 'unknown');
274 } elseif (is_array($cause) && isset($cause['message'])) {
275 // PEAR_ErrorStack warning
277 'class' => $cause['package'],
278 'message' => $cause['message'],
279 'file' => isset($cause['context']['file']) ?
280 $cause['context']['file'] :
282 'line' => isset($cause['context']['line']) ?
283 $cause['context']['line'] :
291 public function getTraceSafe()
293 if (!isset($this->_trace)) {
294 $this->_trace = $this->getTrace();
295 if (empty($this->_trace)) {
296 $backtrace = debug_backtrace();
297 $this->_trace = array($backtrace[count($backtrace)-1]);
300 return $this->_trace;
303 public function getErrorClass()
305 $trace = $this->getTraceSafe();
306 return $trace[0]['class'];
309 public function getErrorMethod()
311 $trace = $this->getTraceSafe();
312 return $trace[0]['function'];
315 public function __toString()
317 if (isset($_SERVER['REQUEST_URI'])) {
318 return $this->toHtml();
320 return $this->toText();
323 public function toHtml()
325 $trace = $this->getTraceSafe();
327 $this->getCauseMessage($causes);
328 $html = '<table style="border: 1px" cellspacing="0">' . "\n";
329 foreach ($causes as $i => $cause) {
330 $html .= '<tr><td colspan="3" style="background: #ff9999">'
331 . str_repeat('-', $i) . ' <b>' . $cause['class'] . '</b>: '
332 . htmlspecialchars($cause['message']) . ' in <b>' . $cause['file'] . '</b> '
333 . 'on line <b>' . $cause['line'] . '</b>'
336 $html .= '<tr><td colspan="3" style="background-color: #aaaaaa; text-align: center; font-weight: bold;">Exception trace</td></tr>' . "\n"
337 . '<tr><td style="text-align: center; background: #cccccc; width:20px; font-weight: bold;">#</td>'
338 . '<td style="text-align: center; background: #cccccc; font-weight: bold;">Function</td>'
339 . '<td style="text-align: center; background: #cccccc; font-weight: bold;">Location</td></tr>' . "\n";
341 foreach ($trace as $k => $v) {
342 $html .= '<tr><td style="text-align: center;">' . $k . '</td>'
344 if (!empty($v['class'])) {
345 $html .= $v['class'] . $v['type'];
347 $html .= $v['function'];
349 if (!empty($v['args'])) {
350 foreach ($v['args'] as $arg) {
351 if (is_null($arg)) $args[] = 'null';
352 elseif (is_array($arg)) $args[] = 'Array';
353 elseif (is_object($arg)) $args[] = 'Object('.get_class($arg).')';
354 elseif (is_bool($arg)) $args[] = $arg ? 'true' : 'false';
355 elseif (is_int($arg) || is_double($arg)) $args[] = $arg;
358 $str = htmlspecialchars(substr($arg, 0, 16));
359 if (strlen($arg) > 16) $str .= '…';
360 $args[] = "'" . $str . "'";
364 $html .= '(' . implode(', ',$args) . ')'
366 . '<td>' . (isset($v['file']) ? $v['file'] : 'unknown')
367 . ':' . (isset($v['line']) ? $v['line'] : 'unknown')
368 . '</td></tr>' . "\n";
370 $html .= '<tr><td style="text-align: center;">' . ($k+1) . '</td>'
372 . '<td> </td></tr>' . "\n"
377 public function toText()
380 $this->getCauseMessage($causes);
382 foreach ($causes as $i => $cause) {
383 $causeMsg .= str_repeat(' ', $i) . $cause['class'] . ': '
384 . $cause['message'] . ' in ' . $cause['file']
385 . ' on line ' . $cause['line'] . "\n";
387 return $causeMsg . $this->getTraceAsString();