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-<?php
-/* vim: set expandtab tabstop=4 shiftwidth=4 foldmethod=marker: */
-// +----------------------------------------------------------------------+
-// | PEAR_Exception |
-// +----------------------------------------------------------------------+
-// | Copyright (c) 2004 The PEAR Group |
-// +----------------------------------------------------------------------+
-// | This source file is subject to version 3.0 of the PHP license, |
-// | that is bundled with this package in the file LICENSE, and is |
-// | available at through the world-wide-web at |
-// | http://www.php.net/license/3_0.txt. |
-// | If you did not receive a copy of the PHP license and are unable to |
-// | obtain it through the world-wide-web, please send a note to |
-// | license@php.net so we can mail you a copy immediately. |
-// +----------------------------------------------------------------------+
-// | Authors: Tomas V.V.Cox <cox@idecnet.com> |
-// | Hans Lellelid <hans@velum.net> |
-// | Bertrand Mansion <bmansion@mamasam.com> |
-// | Greg Beaver <cellog@php.net> |
-// +----------------------------------------------------------------------+
-//
-// $Id$
-
-
-/**
- * Base PEAR_Exception Class
- *
- * WARNING: This code should be considered stable, but the API is
- * subject to immediate and drastic change, so API stability is
- * at best alpha
- *
- * 1) Features:
- *
- * - Nestable exceptions (throw new PEAR_Exception($msg, $prev_exception))
- * - Definable triggers, shot when exceptions occur
- * - Pretty and informative error messages
- * - Added more context info available (like class, method or cause)
- * - cause can be a PEAR_Exception or an array of mixed
- * PEAR_Exceptions/PEAR_ErrorStack warnings
- * - callbacks for specific exception classes and their children
- *
- * 2) Ideas:
- *
- * - Maybe a way to define a 'template' for the output
- *
- * 3) Inherited properties from PHP Exception Class:
- *
- * protected $message
- * protected $code
- * protected $line
- * protected $file
- * private $trace
- *
- * 4) Inherited methods from PHP Exception Class:
- *
- * __clone
- * __construct
- * getMessage
- * getCode
- * getFile
- * getLine
- * getTraceSafe
- * getTraceSafeAsString
- * __toString
- *
- * 5) Usage example
- *
- * <code>
- * require_once 'PEAR/Exception.php';
- *
- * class Test {
- * function foo() {
- * throw new PEAR_Exception('Error Message', ERROR_CODE);
- * }
- * }
- *
- * function myLogger($pear_exception) {
- * echo $pear_exception->getMessage();
- * }
- * // each time a exception is thrown the 'myLogger' will be called
- * // (its use is completely optional)
- * PEAR_Exception::addObserver('myLogger');
- * $test = new Test;
- * try {
- * $test->foo();
- * } catch (PEAR_Exception $e) {
- * print $e;
- * }
- * </code>
- *
- * @since PHP 5
- * @package PEAR
- * @version $Revision$
- * @author Tomas V.V.Cox <cox@idecnet.com>
- * @author Hans Lellelid <hans@velum.net>
- * @author Bertrand Mansion <bmansion@mamasam.com>
- *
- */
-class PEAR_Exception extends Exception
-{
- const OBSERVER_PRINT = -2;
- const OBSERVER_TRIGGER = -4;
- const OBSERVER_DIE = -8;
- protected $cause;
- private static $_observers = array();
- private static $_uniqueid = 0;
- private $_trace;
-
- /**
- * Supported signatures:
- * PEAR_Exception(string $message);
- * PEAR_Exception(string $message, int $code);
- * PEAR_Exception(string $message, Exception $cause);
- * PEAR_Exception(string $message, Exception $cause, int $code);
- * PEAR_Exception(string $message, array $causes);
- * PEAR_Exception(string $message, array $causes, int $code);
- */
- public function __construct($message, $p2 = null, $p3 = null)
- {
- if (is_int($p2)) {
- $code = $p2;
- $this->cause = null;
- } elseif ($p2 instanceof Exception || is_array($p2)) {
- $code = $p3;
- if (is_array($p2) && isset($p2['message'])) {
- // fix potential problem of passing in a single warning
- $p2 = array($p2);
- }
- $this->cause = $p2;
- } else {
- $code = null;
- $this->cause = null;
- }
- parent::__construct($message, $code);
- $this->signal();
- }
-
- /**
- * @param mixed $callback - A valid php callback, see php func is_callable()
- * - A PEAR_Exception::OBSERVER_* constant
- * - An array(const PEAR_Exception::OBSERVER_*,
- * mixed $options)
- * @param string $label The name of the observer. Use this if you want
- * to remove it later with removeObserver()
- */
- public static function addObserver($callback, $label = 'default')
- {
- self::$_observers[$label] = $callback;
- }
-
- public static function removeObserver($label = 'default')
- {
- unset(self::$_observers[$label]);
- }
-
- /**
- * @return int unique identifier for an observer
- */
- public static function getUniqueId()
- {
- return self::$_uniqueid++;
- }
-
- private function signal()
- {
- foreach (self::$_observers as $func) {
- if (is_callable($func)) {
- call_user_func($func, $this);
- continue;
- }
- settype($func, 'array');
- switch ($func[0]) {
- case self::OBSERVER_PRINT :
- $f = (isset($func[1])) ? $func[1] : '%s';
- printf($f, $this->getMessage());
- break;
- case self::OBSERVER_TRIGGER :
- $f = (isset($func[1])) ? $func[1] : E_USER_NOTICE;
- trigger_error($this->getMessage(), $f);
- break;
- case self::OBSERVER_DIE :
- $f = (isset($func[1])) ? $func[1] : '%s';
- die(printf($f, $this->getMessage()));
- break;
- default:
- trigger_error('invalid observer type', E_USER_WARNING);
- }
- }
- }
-
- /**
- * Return specific error information that can be used for more detailed
- * error messages or translation.
- *
- * This method may be overridden in child exception classes in order
- * to add functionality not present in PEAR_Exception and is a placeholder
- * to define API
- *
- * The returned array must be an associative array of parameter => value like so:
- * <pre>
- * array('name' => $name, 'context' => array(...))
- * </pre>
- * @return array
- */
- public function getErrorData()
- {
- return array();
- }
-
- /**
- * Returns the exception that caused this exception to be thrown
- * @access public
- * @return Exception|array The context of the exception
- */
- public function getCause()
- {
- return $this->cause;
- }
-
- /**
- * Function must be public to call on caused exceptions
- * @param array
- */
- public function getCauseMessage(&$causes)
- {
- $trace = $this->getTraceSafe();
- $cause = array('class' => get_class($this),
- 'message' => $this->message,
- 'file' => 'unknown',
- 'line' => 'unknown');
- if (isset($trace[0])) {
- if (isset($trace[0]['file'])) {
- $cause['file'] = $trace[0]['file'];
- $cause['line'] = $trace[0]['line'];
- }
- }
- if ($this->cause instanceof PEAR_Exception) {
- $this->cause->getCauseMessage($causes);
- }
- if (is_array($this->cause)) {
- foreach ($this->cause as $cause) {
- if ($cause instanceof PEAR_Exception) {
- $cause->getCauseMessage($causes);
- } elseif (is_array($cause) && isset($cause['message'])) {
- // PEAR_ErrorStack warning
- $causes[] = array(
- 'class' => $cause['package'],
- 'message' => $cause['message'],
- 'file' => isset($cause['context']['file']) ?
- $cause['context']['file'] :
- 'unknown',
- 'line' => isset($cause['context']['line']) ?
- $cause['context']['line'] :
- 'unknown',
- );
- }
- }
- }
- }
-
- public function getTraceSafe()
- {
- if (!isset($this->_trace)) {
- $this->_trace = $this->getTrace();
- if (empty($this->_trace)) {
- $backtrace = debug_backtrace();
- $this->_trace = array($backtrace[count($backtrace)-1]);
- }
- }
- return $this->_trace;
- }
-
- public function getErrorClass()
- {
- $trace = $this->getTraceSafe();
- return $trace[0]['class'];
- }
-
- public function getErrorMethod()
- {
- $trace = $this->getTraceSafe();
- return $trace[0]['function'];
- }
-
- public function __toString()
- {
- if (isset($_SERVER['REQUEST_URI'])) {
- return $this->toHtml();
- }
- return $this->toText();
- }
-
- public function toHtml()
- {
- $trace = $this->getTraceSafe();
- $causes = array();
- $this->getCauseMessage($causes);
- $html = '<table border="1" cellspacing="0">' . "\n";
- foreach ($causes as $i => $cause) {
- $html .= '<tr><td colspan="3" bgcolor="#ff9999">'
- . str_repeat('-', $i) . ' <b>' . $cause['class'] . '</b>: '
- . htmlspecialchars($cause['message']) . ' in <b>' . $cause['file'] . '</b> '
- . 'on line <b>' . $cause['line'] . '</b>'
- . "</td></tr>\n";
- }
- $html .= '<tr><td colspan="3" bgcolor="#aaaaaa" align="center"><b>Exception trace</b></td></tr>' . "\n"
- . '<tr><td align="center" bgcolor="#cccccc" width="20"><b>#</b></td>'
- . '<td align="center" bgcolor="#cccccc"><b>Function</b></td>'
- . '<td align="center" bgcolor="#cccccc"><b>Location</b></td></tr>' . "\n";
-
- foreach ($trace as $k => $v) {
- $html .= '<tr><td align="center">' . $k . '</td>'
- . '<td>';
- if (!empty($v['class'])) {
- $html .= $v['class'] . $v['type'];
- }
- $html .= $v['function'];
- $args = array();
- if (!empty($v['args'])) {
- foreach ($v['args'] as $arg) {
- if (is_null($arg)) $args[] = 'null';
- elseif (is_array($arg)) $args[] = 'Array';
- elseif (is_object($arg)) $args[] = 'Object('.get_class($arg).')';
- elseif (is_bool($arg)) $args[] = $arg ? 'true' : 'false';
- elseif (is_int($arg) || is_double($arg)) $args[] = $arg;
- else {
- $arg = (string)$arg;
- $str = htmlspecialchars(substr($arg, 0, 16));
- if (strlen($arg) > 16) $str .= '&hellip;';
- $args[] = "'" . $str . "'";
- }
- }
- }
- $html .= '(' . implode(', ',$args) . ')'
- . '</td>'
- . '<td>' . $v['file'] . ':' . $v['line'] . '</td></tr>' . "\n";
- }
- $html .= '<tr><td align="center">' . ($k+1) . '</td>'
- . '<td>{main}</td>'
- . '<td>&nbsp;</td></tr>' . "\n"
- . '</table>';
- return $html;
- }
-
- public function toText()
- {
- $causes = array();
- $this->getCauseMessage($causes);
- $causeMsg = '';
- foreach ($causes as $i => $cause) {
- $causeMsg .= str_repeat(' ', $i) . $cause['class'] . ': '
- . $cause['message'] . ' in ' . $cause['file']
- . ' on line ' . $cause['line'] . "\n";
- }
- return $causeMsg . $this->getTraceAsString();
- }
-}
-
-?> \ No newline at end of file