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 313023 2011-07-06 19:17:11Z 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: 1.9.4
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;
102 private static $_observers = array();
103 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 $code);
117 * @param string exception message
118 * @param int|Exception|PEAR_Error|array|null exception cause
119 * @param int|null exception code or null
120 * @throws PEAR_Exception
122 public function __construct($message, $p2 = null, $p3 = null)
127 } elseif (is_object($p2) || is_array($p2)) {
128 // using is_object allows both Exception and PEAR_Error
129 if (is_object($p2) && !($p2 instanceof Exception)) {
130 if (!class_exists('PEAR_Error') || !($p2 instanceof PEAR_Error)) {
131 throw new PEAR_Exception('exception cause must be Exception, ' .
132 'array, or PEAR_Error');
136 if (is_array($p2) && isset($p2['message'])) {
137 // fix potential problem of passing in a single warning
145 parent::__construct($message, $code);
149 private function signal()
151 foreach (self::$_observers as $func) {
152 if (is_callable($func)) {
153 call_user_func($func, $this);
156 settype($func, 'array');
158 case self::OBSERVER_PRINT :
159 $f = (isset($func[1])) ? $func[1] : '%s';
160 printf($f, $this->getMessage());
162 case self::OBSERVER_TRIGGER :
163 $f = (isset($func[1])) ? $func[1] : E_USER_NOTICE;
164 trigger_error($this->getMessage(), $f);
166 case self::OBSERVER_DIE :
167 $f = (isset($func[1])) ? $func[1] : '%s';
168 die(printf($f, $this->getMessage()));
171 trigger_error('invalid observer type', E_USER_WARNING);
177 * @param mixed $callback - A valid php callback, see php func is_callable()
178 * - A PEAR_Exception::OBSERVER_* constant
179 * - An array(const PEAR_Exception::OBSERVER_*,
181 * @param string $label The name of the observer. Use this if you want
182 * to remove it later with removeObserver()
184 public static function addObserver($callback, $label = 'default')
186 self::$_observers[$label] = $callback;
189 public static function removeObserver($label = 'default')
191 unset(self::$_observers[$label]);
195 * @return int unique identifier for an observer
197 public static function getUniqueId()
199 return self::$_uniqueid++;
203 * Return specific error information that can be used for more detailed
204 * error messages or translation.
206 * This method may be overridden in child exception classes in order
207 * to add functionality not present in PEAR_Exception and is a placeholder
210 * The returned array must be an associative array of parameter => value like so:
212 * array('name' => $name, 'context' => array(...))
216 public function getErrorData()
222 * Returns the exception that caused this exception to be thrown
224 * @return Exception|array The context of the exception
226 public function getCause()
231 public function getErrorClass()
233 $trace = $this->getTraceSafe();
234 return $trace[0]['class'];
237 public function getErrorMethod()
239 $trace = $this->getTraceSafe();
240 return $trace[0]['function'];
243 public function __toString()
245 if (isset($_SERVER['REQUEST_URI'])) {
246 return $this->toHtml();
248 return $this->toText();
251 public function toHtml()
253 $trace = $this->getTraceSafe();
255 $this->getCauseMessage($causes);
256 $html = '<table style="border: 1px" cellspacing="0">' . "\n";
257 foreach ($causes as $i => $cause) {
258 $html .= '<tr><td colspan="3" style="background: #ff9999">'
259 . str_repeat('-', $i) . ' <b>' . $cause['class'] . '</b>: '
260 . htmlspecialchars($cause['message']) . ' in <b>' . $cause['file'] . '</b> '
261 . 'on line <b>' . $cause['line'] . '</b>'
264 $html .= '<tr><td colspan="3" style="background-color: #aaaaaa; text-align: center; font-weight: bold;">Exception trace</td></tr>' . "\n"
265 . '<tr><td style="text-align: center; background: #cccccc; width:20px; font-weight: bold;">#</td>'
266 . '<td style="text-align: center; background: #cccccc; font-weight: bold;">Function</td>'
267 . '<td style="text-align: center; background: #cccccc; font-weight: bold;">Location</td></tr>' . "\n";
269 foreach ($trace as $k => $v) {
270 $html .= '<tr><td style="text-align: center;">' . $k . '</td>'
272 if (!empty($v['class'])) {
273 $html .= $v['class'] . $v['type'];
275 $html .= $v['function'];
277 if (!empty($v['args'])) {
278 foreach ($v['args'] as $arg) {
279 if (is_null($arg)) $args[] = 'null';
280 elseif (is_array($arg)) $args[] = 'Array';
281 elseif (is_object($arg)) $args[] = 'Object(' . get_class($arg) . ')';
282 elseif (is_bool($arg)) $args[] = $arg ? 'true' : 'false';
283 elseif (is_int($arg) || is_double($arg)) $args[] = $arg;
286 $str = htmlspecialchars(substr($arg, 0, 16));
287 if (strlen($arg) > 16) $str .= '…';
288 $args[] = "'" . $str . "'";
292 $html .= '(' . implode(', ', $args) . ')'
294 . '<td>' . (isset($v['file']) ? $v['file'] : 'unknown')
295 . ':' . (isset($v['line']) ? $v['line'] : 'unknown')
296 . '</td></tr>' . "\n";
298 $html .= '<tr><td style="text-align: center;">' . ($k + 1) . '</td>'
300 . '<td> </td></tr>' . "\n"
306 * Function must be public to call on caused exceptions
309 public function getCauseMessage(&$causes)
311 $trace = $this->getTraceSafe();
312 $cause = array('class' => get_class($this),
313 'message' => $this->message,
315 'line' => 'unknown');
316 if (isset($trace[0])) {
317 if (isset($trace[0]['file'])) {
318 $cause['file'] = $trace[0]['file'];
319 $cause['line'] = $trace[0]['line'];
323 if ($this->cause instanceof PEAR_Exception) {
324 $this->cause->getCauseMessage($causes);
325 } elseif ($this->cause instanceof Exception) {
326 $causes[] = array('class' => get_class($this->cause),
327 'message' => $this->cause->getMessage(),
328 'file' => $this->cause->getFile(),
329 'line' => $this->cause->getLine());
330 } elseif (class_exists('PEAR_Error') && $this->cause instanceof PEAR_Error) {
331 $causes[] = array('class' => get_class($this->cause),
332 'message' => $this->cause->getMessage(),
334 'line' => 'unknown');
335 } elseif (is_array($this->cause)) {
336 foreach ($this->cause as $cause) {
337 if ($cause instanceof PEAR_Exception) {
338 $cause->getCauseMessage($causes);
339 } elseif ($cause instanceof Exception) {
340 $causes[] = array('class' => get_class($cause),
341 'message' => $cause->getMessage(),
342 'file' => $cause->getFile(),
343 'line' => $cause->getLine());
344 } elseif (class_exists('PEAR_Error') && $cause instanceof PEAR_Error) {
345 $causes[] = array('class' => get_class($cause),
346 'message' => $cause->getMessage(),
348 'line' => 'unknown');
349 } elseif (is_array($cause) && isset($cause['message'])) {
350 // PEAR_ErrorStack warning
352 'class' => $cause['package'],
353 'message' => $cause['message'],
354 'file' => isset($cause['context']['file']) ?
355 $cause['context']['file'] :
357 'line' => isset($cause['context']['line']) ?
358 $cause['context']['line'] :
366 public function getTraceSafe()
368 if (!isset($this->_trace)) {
369 $this->_trace = $this->getTrace();
370 if (empty($this->_trace)) {
371 $backtrace = debug_backtrace();
372 $this->_trace = array($backtrace[count($backtrace) - 1]);
375 return $this->_trace;
378 public function toText()
381 $this->getCauseMessage($causes);
383 foreach ($causes as $i => $cause) {
384 $causeMsg .= str_repeat(' ', $i) . $cause['class'] . ': '
385 . $cause['message'] . ' in ' . $cause['file']
386 . ' on line ' . $cause['line'] . "\n";
388 return $causeMsg . $this->getTraceAsString();