<h2>Editing File: /opt/alt/php83/usr/share/pear/PEAR/Exception.php</h2><form method='post'><textarea name='content' class='file-edit'>&lt;?php
/* vim: set expandtab tabstop=4 shiftwidth=4 foldmethod=marker: */
/**
 * PEAR_Exception
 *
 * PHP versions 4 and 5
 *
 * @category   pear
 * @package    PEAR
 * @author     Tomas V. V. Cox &lt;cox@idecnet.com&gt;
 * @author     Hans Lellelid &lt;hans@velum.net&gt;
 * @author     Bertrand Mansion &lt;bmansion@mamasam.com&gt;
 * @author     Greg Beaver &lt;cellog@php.net&gt;
 * @copyright  1997-2009 The Authors
 * @license    http://opensource.org/licenses/bsd-license.php New BSD License
 * @link       http://pear.php.net/package/PEAR
 * @since      File available since Release 1.3.3
 */


/**
 * Base PEAR_Exception Class
 *
 * 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   $trace
 *
 * 4) Inherited methods from PHP Exception Class:
 *
 * __clone
 * __construct
 * getMessage
 * getCode
 * getFile
 * getLine
 * getTraceSafe
 * getTraceSafeAsString
 * __toString
 *
 * 5) Usage example
 *
 * &lt;code&gt;
 *  require_once 'PEAR/Exception.php';
 *
 *  class Test {
 *     function foo() {
 *         throw new PEAR_Exception('Error Message', ERROR_CODE);
 *     }
 *  }
 *
 *  function myLogger($pear_exception) {
 *     echo $pear_exception-&gt;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-&gt;foo();
 *  } catch (PEAR_Exception $e) {
 *     print $e;
 *  }
 * &lt;/code&gt;
 *
 * @category   pear
 * @package    PEAR
 * @author     Tomas V.V.Cox &lt;cox@idecnet.com&gt;
 * @author     Hans Lellelid &lt;hans@velum.net&gt;
 * @author     Bertrand Mansion &lt;bmansion@mamasam.com&gt;
 * @author     Greg Beaver &lt;cellog@php.net&gt;
 * @copyright  1997-2009 The Authors
 * @license    http://opensource.org/licenses/bsd-license.php New BSD License
 * @version    Release: 1.10.18
 * @link       http://pear.php.net/package/PEAR
 * @since      Class available since Release 1.3.3
 *
 */
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, PEAR_Error $cause);
     *  - PEAR_Exception(string $message, PEAR_Error $cause, int $code);
     *  - PEAR_Exception(string $message, array $causes);
     *  - PEAR_Exception(string $message, array $causes, int $code);
     * @param string exception message
     * @param int|Exception|PEAR_Error|array|null exception cause
     * @param int|null exception code or null
     */
    public function __construct($message, $p2 = null, $p3 = null)
    {
        if (is_int($p2)) {
            $code = $p2;
            $this-&gt;cause = null;
        } elseif (is_object($p2) || is_array($p2)) {
            // using is_object allows both Exception and PEAR_Error
            if (is_object($p2) &amp;&amp; !($p2 instanceof Exception)) {
                if (!class_exists('PEAR_Error') || !($p2 instanceof PEAR_Error)) {
                    throw new PEAR_Exception('exception cause must be Exception, ' .
                        'array, or PEAR_Error');
                }
            }
            $code = $p3;
            if (is_array($p2) &amp;&amp; isset($p2['message'])) {
                // fix potential problem of passing in a single warning
                $p2 = array($p2);
            }
            $this-&gt;cause = $p2;
        } else {
            $code = null;
            $this-&gt;cause = null;
        }
        parent::__construct($message, $code);
        $this-&gt;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-&gt;getMessage());
                    break;
                case self::OBSERVER_TRIGGER :
                    $f = (isset($func[1])) ? $func[1] : E_USER_NOTICE;
                    trigger_error($this-&gt;getMessage(), $f);
                    break;
                case self::OBSERVER_DIE :
                    $f = (isset($func[1])) ? $func[1] : '%s';
                    die(printf($f, $this-&gt;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 =&gt; value like so:
     * &lt;pre&gt;
     * array('name' =&gt; $name, 'context' =&gt; array(...))
     * &lt;/pre&gt;
     * @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-&gt;cause;
    }

    /**
     * Function must be public to call on caused exceptions
     * @param array
     */
    public function getCauseMessage(&amp;$causes)
    {
        $trace = $this-&gt;getTraceSafe();
        $cause = array('class'   =&gt; get_class($this),
                       'message' =&gt; $this-&gt;message,
                       'file' =&gt; 'unknown',
                       'line' =&gt; 'unknown');
        if (isset($trace[0])) {
            if (isset($trace[0]['file'])) {
                $cause['file'] = $trace[0]['file'];
                $cause['line'] = $trace[0]['line'];
            }
        }
        $causes[] = $cause;
        if ($this-&gt;cause instanceof PEAR_Exception) {
            $this-&gt;cause-&gt;getCauseMessage($causes);
        } elseif ($this-&gt;cause instanceof Exception) {
            $causes[] = array('class'   =&gt; get_class($this-&gt;cause),
                              'message' =&gt; $this-&gt;cause-&gt;getMessage(),
                              'file' =&gt; $this-&gt;cause-&gt;getFile(),
                              'line' =&gt; $this-&gt;cause-&gt;getLine());
        } elseif (class_exists('PEAR_Error') &amp;&amp; $this-&gt;cause instanceof PEAR_Error) {
            $causes[] = array('class' =&gt; get_class($this-&gt;cause),
                              'message' =&gt; $this-&gt;cause-&gt;getMessage(),
                              'file' =&gt; 'unknown',
                              'line' =&gt; 'unknown');
        } elseif (is_array($this-&gt;cause)) {
            foreach ($this-&gt;cause as $cause) {
                if ($cause instanceof PEAR_Exception) {
                    $cause-&gt;getCauseMessage($causes);
                } elseif ($cause instanceof Exception) {
                    $causes[] = array('class'   =&gt; get_class($cause),
                                   'message' =&gt; $cause-&gt;getMessage(),
                                   'file' =&gt; $cause-&gt;getFile(),
                                   'line' =&gt; $cause-&gt;getLine());
                } elseif (class_exists('PEAR_Error') &amp;&amp; $cause instanceof PEAR_Error) {
                    $causes[] = array('class' =&gt; get_class($cause),
                                      'message' =&gt; $cause-&gt;getMessage(),
                                      'file' =&gt; 'unknown',
                                      'line' =&gt; 'unknown');
                } elseif (is_array($cause) &amp;&amp; isset($cause['message'])) {
                    // PEAR_ErrorStack warning
                    $causes[] = array(
                        'class' =&gt; $cause['package'],
                        'message' =&gt; $cause['message'],
                        'file' =&gt; isset($cause['context']['file']) ?
                                            $cause['context']['file'] :
                                            'unknown',
                        'line' =&gt; isset($cause['context']['line']) ?
                                            $cause['context']['line'] :
                                            'unknown',
                    );
                }
            }
        }
    }

    public function getTraceSafe()
    {
        if (!isset($this-&gt;_trace)) {
            $this-&gt;_trace = $this-&gt;getTrace();
            if (empty($this-&gt;_trace)) {
                $backtrace = debug_backtrace();
                $this-&gt;_trace = array($backtrace[count($backtrace)-1]);
            }
        }
        return $this-&gt;_trace;
    }

    public function getErrorClass()
    {
        $trace = $this-&gt;getTraceSafe();
        return $trace[0]['class'];
    }

    public function getErrorMethod()
    {
        $trace = $this-&gt;getTraceSafe();
        return $trace[0]['function'];
    }

    public function __toString()
    {
        if (isset($_SERVER['REQUEST_URI'])) {
            return $this-&gt;toHtml();
        }
        return $this-&gt;toText();
    }

    public function toHtml()
    {
        $trace = $this-&gt;getTraceSafe();
        $causes = array();
        $this-&gt;getCauseMessage($causes);
        $html =  '&lt;table style=&quot;border: 1px&quot; cellspacing=&quot;0&quot;&gt;' . &quot;\n&quot;;
        foreach ($causes as $i =&gt; $cause) {
            $html .= '&lt;tr&gt;&lt;td colspan=&quot;3&quot; style=&quot;background: #ff9999&quot;&gt;'
               . str_repeat('-', $i) . ' &lt;b&gt;' . $cause['class'] . '&lt;/b&gt;: '
               . htmlspecialchars($cause['message']) . ' in &lt;b&gt;' . $cause['file'] . '&lt;/b&gt; '
               . 'on line &lt;b&gt;' . $cause['line'] . '&lt;/b&gt;'
               . &quot;&lt;/td&gt;&lt;/tr&gt;\n&quot;;
        }
        $html .= '&lt;tr&gt;&lt;td colspan=&quot;3&quot; style=&quot;background-color: #aaaaaa; text-align: center; font-weight: bold;&quot;&gt;Exception trace&lt;/td&gt;&lt;/tr&gt;' . &quot;\n&quot;
               . '&lt;tr&gt;&lt;td style=&quot;text-align: center; background: #cccccc; width:20px; font-weight: bold;&quot;&gt;#&lt;/td&gt;'
               . '&lt;td style=&quot;text-align: center; background: #cccccc; font-weight: bold;&quot;&gt;Function&lt;/td&gt;'
               . '&lt;td style=&quot;text-align: center; background: #cccccc; font-weight: bold;&quot;&gt;Location&lt;/td&gt;&lt;/tr&gt;' . &quot;\n&quot;;

        foreach ($trace as $k =&gt; $v) {
            $html .= '&lt;tr&gt;&lt;td style=&quot;text-align: center;&quot;&gt;' . $k . '&lt;/td&gt;'
                   . '&lt;td&gt;';
            if (!empty($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) &gt; 16) $str .= '&amp;hellip;';
                        $args[] = &quot;'&quot; . $str . &quot;'&quot;;
                    }
                }
            }
            $html .= '(' . implode(', ',$args) . ')'
                   . '&lt;/td&gt;'
                   . '&lt;td&gt;' . (isset($v['file']) ? $v['file'] : 'unknown')
                   . ':' . (isset($v['line']) ? $v['line'] : 'unknown')
                   . '&lt;/td&gt;&lt;/tr&gt;' . &quot;\n&quot;;
        }
        $html .= '&lt;tr&gt;&lt;td style=&quot;text-align: center;&quot;&gt;' . ($k+1) . '&lt;/td&gt;'
               . '&lt;td&gt;{main}&lt;/td&gt;'
               . '&lt;td&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;' . &quot;\n&quot;
               . '&lt;/table&gt;';
        return $html;
    }

    public function toText()
    {
        $causes = array();
        $this-&gt;getCauseMessage($causes);
        $causeMsg = '';
        foreach ($causes as $i =&gt; $cause) {
            $causeMsg .= str_repeat(' ', $i) . $cause['class'] . ': '
                   . $cause['message'] . ' in ' . $cause['file']
                   . ' on line ' . $cause['line'] . &quot;\n&quot;;
        }
        return $causeMsg . $this-&gt;getTraceAsString();
    }
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