&＃39; . $message . &＃39;
PHP:&＃39; . $logTrace;
            self::writeErrorLog($messageSave);
        }
        if ($show) {
            self::showError(&＃39;system&＃39;, "
$message
", $showTrace, 0);
        }
        if ($halt) {
            exit();
        } else {
            return $message;
        }
    }
    /**
     * 代码执行过程回溯信息
     *
     * @static
     * @access public
     */
    public static function debugBacktrace() {
        $skipFunc[] = &＃39;Error->debugBacktrace&＃39;;
        $show = $log = &＃39;&＃39;;
        $debugBacktrace = debug_backtrace();
        ksort($debugBacktrace);
        foreach ($debugBacktrace as $k => $error) {
            if (!isset($error[&＃39;file&＃39;])) {
                // 利用反射API来获取方法/函数所在的文件和行数
                try {
                    if (isset($error[&＃39;class&＃39;])) {
                        $reflection = new ReflectionMethod($error[&＃39;class&＃39;], $error[&＃39;function&＃39;]);
                    } else {
                        $reflection = new ReflectionFunction($error[&＃39;function&＃39;]);
                    }
                    $error[&＃39;file&＃39;] = $reflection->getFileName();
                    $error[&＃39;line&＃39;] = $reflection->getStartLine();
                }
                catch(Exception $e) {
                    continue;
                }
            }
            $file = str_replace(SITE_PATH, &＃39;&＃39;, $error[&＃39;file&＃39;]);
            $func = isset($error[&＃39;class&＃39;]) ? $error[&＃39;class&＃39;] : &＃39;&＃39;;
            $func.= isset($error[&＃39;type&＃39;]) ? $error[&＃39;type&＃39;] : &＃39;&＃39;;
            $func.= isset($error[&＃39;function&＃39;]) ? $error[&＃39;function&＃39;] : &＃39;&＃39;;
            if (in_array($func, $skipFunc)) {
                break;
            }
            $error[&＃39;line&＃39;] = sprintf(&＃39;%04d&＃39;, $error[&＃39;line&＃39;]);
            $show.= &＃39;
[Line: &＃39; . $error[&＃39;line&＃39;] . &＃39;]&＃39; . $file . &＃39;(&＃39; . $func . &＃39;)
&＃39;;
            $log.= !empty($log) ? &＃39; -> &＃39; : &＃39;&＃39;;
            $log.= $file . &＃39;:&＃39; . $error[&＃39;line&＃39;];
        }
        return array(
            $show,
            $log
        );
    }
    /**
     * 异常处理
     *
     * @static
     * @access public
     * @param mixed $exception
     */
    public static function exceptionError($exception) {
        if ($exception instanceof DbException) {
            $type = &＃39;db&＃39;;
        } else {
            $type = &＃39;system&＃39;;
        }
        if ($type == &＃39;db&＃39;) {
            $errorMsg = &＃39;(&＃39; . $exception->getCode() . &＃39;) &＃39;;
            $errorMsg.= self::sqlClear($exception->getMessage() , $exception->getDbConfig());
            if ($exception->getSql()) {
                $errorMsg.= &＃39;
&＃39;;
                $errorMsg.= self::sqlClear($exception->getSql() , $exception->getDbConfig());
                $errorMsg.= &＃39;
&＃39;;
            }
        } else {
            $errorMsg = $exception->getMessage();
        }
        $trace = $exception->getTrace();
        krsort($trace);
        $trace[] = array(
            &＃39;file&＃39; => $exception->getFile() ,
            &＃39;line&＃39; => $exception->getLine() ,
            &＃39;function&＃39; => &＃39;break&＃39;
        );
        $phpMsg = array();
        foreach ($trace as $error) {
            if (!empty($error[&＃39;function&＃39;])) {
                $fun = &＃39;&＃39;;
                if (!empty($error[&＃39;class&＃39;])) {
                    $fun.= $error[&＃39;class&＃39;] . $error[&＃39;type&＃39;];
                }
                $fun.= $error[&＃39;function&＃39;] . &＃39;(&＃39;;
                if (!empty($error[&＃39;args&＃39;])) {
                    $mark = &＃39;&＃39;;
                    foreach ($error[&＃39;args&＃39;] as $arg) {
                        $fun.= $mark;
                        if (is_array($arg)) {
                            $fun.= &＃39;Array&＃39;;
                        } elseif (is_bool($arg)) {
                            $fun.= $arg ? &＃39;true&＃39; : &＃39;false&＃39;;
                        } elseif (is_int($arg)) {
                            $fun.= (defined(&＃39;SITE_DEBUG&＃39;) && SITE_DEBUG) ? $arg : &＃39;%d&＃39;;
                        } elseif (is_float($arg)) {
                            $fun.= (defined(&＃39;SITE_DEBUG&＃39;) && SITE_DEBUG) ? $arg : &＃39;%f&＃39;;
                        } else {
                            $fun.= (defined(&＃39;SITE_DEBUG&＃39;) && SITE_DEBUG) ? &＃39;&＃39;&＃39; . htmlspecialchars(substr(self::clear($arg), 0, 10)) . (strlen($arg) > 10 ? &＃39; . . . &＃39; : &＃39;&＃39;) . &＃39;&＃39;&＃39; : &＃39;%s&＃39;;
                        }
                        $mark = &＃39;, &＃39;;
                    }
                }
                $fun.= &＃39;)&＃39;;
                $error[&＃39;function&＃39;] = $fun;
            }
            if (!isset($error[&＃39;line&＃39;])) {
                continue;
            }
            $phpMsg[] = array(
                &＃39;file&＃39; => str_replace(array(
                    SITE_PATH,
                    &＃39;&＃39;
                ) , array(
                    &＃39;&＃39;,
                    &＃39;/&＃39;
                ) , $error[&＃39;file&＃39;]) ,
                &＃39;line&＃39; => $error[&＃39;line&＃39;],
                &＃39;function&＃39; => $error[&＃39;function&＃39;]
            );
        }
        self::showError($type, $errorMsg, $phpMsg);
        exit();
    }
    /**
     * 记录错误日志
     *
     * @static
     * @access public
     * @param string $message
     */
    public static function writeErrorLog($message) {
        return false; // 暂时不写入 http://www.phprm.com
        $message = self::clear($message);
        $time = time();
        $file = LOG_PATH . &＃39;/&＃39; . date(&＃39;Y.m.d&＃39;) . &＃39;_errorlog.php&＃39;;
        $hash = md5($message);
        $userId = 0;
        $ip = get_client_ip();
        $user = &＃39;User: userId=&＃39; . intval($userId) . &＃39;; IP=&＃39; . $ip . &＃39;; RIP:&＃39; . $_SERVER[&＃39;REMOTE_ADDR&＃39;];
        $uri = &＃39;Request: &＃39; . htmlspecialchars(self::clear($_SERVER[&＃39;REQUEST_URI&＃39;]));
        $message = " {$time} $message $hash $user $uri ";
        // 判断该$message是否在时间间隔$maxtime内已记录过，有，则不用再记录了
        if (is_file($file)) {
            $fp = @fopen($file, &＃39;rb&＃39;);
            $lastlen = 50000; // 读取最后的 $lastlen 长度字节内容
            $maxtime = 60 * 10; // 时间间隔：10分钟
            $offset = filesize($file) - $lastlen;
            if ($offset > 0) {
                fseek($fp, $offset);
            }
            if ($data = fread($fp, $lastlen)) {
                $array = explode(" ", $data);
                if (is_array($array)) foreach ($array as $key => $val) {
                    $row = explode(" ", $val);
                    if ($row[0] != &＃39;&＃39;) {
                        continue;
                    }
                    if ($row[3] == $hash && ($row[1] > $time - $maxtime)) {
                        return;
                    }
                }
            }
        }
        error_log($message, 3, $file);
    }
    /**
     * 清除文本部分字符
     *
     * @param string $message
     */
    public static function clear($message) {
        return str_replace(array(
            " ",
            " ",
            " "
        ) , " ", $message);
    }
    /**
     * sql语句字符清理
     *
     * @static
     * @access public
     * @param string $message
     * @param string $dbConfig
     */
    public static function sqlClear($message, $dbConfig) {
        $message = self::clear($message);
        if (!(defined(&＃39;SITE_DEBUG&＃39;) && SITE_DEBUG)) {
            $message = str_replace($dbConfig[&＃39;database&＃39;], &＃39;***&＃39;, $message);
            //$message = str_replace($dbConfig[&＃39;prefix&＃39;], &＃39;***&＃39;, $message);
            $message = str_replace(C(&＃39;DB_PREFIX&＃39;) , &＃39;***&＃39;, $message);
        }
        $message = htmlspecialchars($message);
        return $message;
    }
    /**
     * 显示错误
     *
     * @static
     * @access public
     * @param string $type 错误类型 db,system
     * @param string $errorMsg
     * @param string $phpMsg
     */
    public static function showError($type, $errorMsg, $phpMsg = &＃39;&＃39;) {
        global $_G;
        $errorMsg = str_replace(SITE_PATH, &＃39;&＃39;, $errorMsg);
        ob_end_clean();
        $host = $_SERVER[&＃39;HTTP_HOST&＃39;];
        $title = $type == &＃39;db&＃39; ? &＃39;Database&＃39; : &＃39;System&＃39;;
        echo <<
$title Error
$errorMsg
EOT;
        if (!empty($phpMsg)) {
            echo &＃39;
&＃39;;
            echo &＃39;
PHP Debug
&＃39;;
            echo &＃39;&＃39;;
            if (is_array($phpMsg)) {
                echo &＃39;&＃39;;
                foreach ($phpMsg as $k => $msg) {
                    $k++;
                    echo &＃39;&＃39;;
                    echo &＃39;&＃39;;
                    echo &＃39;&＃39;;
                    echo &＃39;&＃39;;
                    echo &＃39;&＃39;;
                    echo &＃39;&＃39;;
                }
            } else {
                echo &＃39;&＃39;;
            }
            echo &＃39;
No.
File
Line
Code
&＃39; . $k . &＃39;
&＃39; . $msg[&＃39;file&＃39;] . &＃39;
&＃39; . $msg[&＃39;line&＃39;] . &＃39;
&＃39; . $msg[&＃39;function&＃39;] . &＃39;
&＃39; . $phpMsg . &＃39;
&＃39;;
        }
        echo <<


EOT;
        exit();
    }
}
/**
 * DB异常类
 *
 * @author www.phprm.com
 */
class DbException extends Exception {
    protected $sql;
    protected $dbConfig; // 当前数据库配置信息
    public function __construct($message, $code = 0, $sql = &＃39;&＃39;, $dbCOnfig= array()) {
        $this->sql = $sql;
        $this->dbCOnfig= $dbConfig;
        parent::__construct($message, $code);
    }
    public function getSql() {
        return $this->sql;
    }
    public function getDbConfig() {
        return $this->dbConfig;
    }
}
?>

效果图：PHP系统异常处理类程序