自定义PHP系统异常处理类

<?php

// 自定义异常函数
set_exception_handler('handle_exception');

// 自定义错误函数
set_error_handler('handle_error');

/**
 * 异常处理
 *
 * @param mixed $exception 异常对象
 * @author 52php.cnblogs.com
 */
function handle_exception($exception) {
	Error::exceptionError($exception);
}

/**
 * 错误处理
 *
 * @param string $errNo 错误代码
 * @param string $errStr 错误信息
 * @param string $errFile 出错文件
 * @param string $errLine 出错行
 * @author 52php.cnblogs.com
 */
function handle_error($errNo, $errStr, $errFile, $errLine) {
	if ($errNo) {
		Error::systemError($errStr, false, true, false);
	}
}

/**
 * 系统错误处理
 *
 * @author 52php.cnblogs.com
 */
class Error {

	public static function systemError($message, $show = true, $save = true, $halt = true) {

		list($showTrace, $logTrace) = self::debugBacktrace();

		if ($save) {
			$messageSave = '<b>' . $message . '</b><br /><b>PHP:</b>' . $logTrace;
			self::writeErrorLog($messageSave);
		}

		if ($show) {
			self::showError('system', "<li>$message</li>", $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[] = 'Error->debugBacktrace';

		$show = $log = '';
		$debugBacktrace = debug_backtrace();
		ksort($debugBacktrace);
		foreach ($debugBacktrace as $k => $error) {
			if (!isset($error['file'])) {
				// 利用反射API来获取方法/函数所在的文件和行数
				try {
					if (isset($error['class'])) {
						$reflection = new ReflectionMethod($error['class'], $error['function']);
					} else {
						$reflection = new ReflectionFunction($error['function']);
					}
					$error['file'] = $reflection->getFileName();
					$error['line'] = $reflection->getStartLine();
				} catch (Exception $e) {
					continue;
				}
			}

			$file = str_replace(SITE_PATH, '', $error['file']);
			$func = isset($error['class']) ? $error['class'] : '';
			$func .= isset($error['type']) ? $error['type'] : '';
			$func .= isset($error['function']) ? $error['function'] : '';
			if (in_array($func, $skipFunc)) {
				break;
			}
			$error['line'] = sprintf('%04d', $error['line']);

			$show .= '<li>[Line: ' . $error['line'] . ']' . $file . '(' . $func . ')</li>';
			$log .= !empty($log) ? ' -> ' : '';
			$log .= $file . ':' . $error['line'];
		}
		return array($show, $log);
	}

	/**
	 * 异常处理
	 *
	 * @static
	 * @access public
	 * @param mixed $exception
	 */
	public static function exceptionError($exception) {
		if ($exception instanceof DbException) {
			$type = 'db';
		} else {
			$type = 'system';
		}
		if ($type == 'db') {
			$errorMsg = '(' . $exception->getCode() . ') ';
			$errorMsg .= self::sqlClear($exception->getMessage(), $exception->getDbConfig());
			if ($exception->getSql()) {
				$errorMsg .= '<div class="sql">';
				$errorMsg .= self::sqlClear($exception->getSql(), $exception->getDbConfig());
				$errorMsg .= '</div>';
			}
		} else {
			$errorMsg = $exception->getMessage();
		}
		$trace = $exception->getTrace();
		krsort($trace);
		$trace[] = array('file' => $exception->getFile(), 'line' => $exception->getLine(), 'function' => 'break');
		$phpMsg = array();
		foreach ($trace as $error) {
			if (!empty($error['function'])) {
				$fun = '';
				if (!empty($error['class'])) {
					$fun .= $error['class'] . $error['type'];
				}
				$fun .= $error['function'] . '(';
				if (!empty($error['args'])) {
					$mark = '';
					foreach ($error['args'] as $arg) {
						$fun .= $mark;
						if (is_array($arg)) {
							$fun .= 'Array';
						} elseif (is_bool($arg)) {
							$fun .= $arg ? 'true' : 'false';
						} elseif (is_int($arg)) {
							$fun .= (defined('SITE_DEBUG') && SITE_DEBUG) ? $arg : '%d';
						} elseif (is_float($arg)) {
							$fun .= (defined('SITE_DEBUG') && SITE_DEBUG) ? $arg : '%f';
						} else {
							$fun .= (defined('SITE_DEBUG') && SITE_DEBUG) ? '\'' . htmlspecialchars(substr(self::clear($arg), 0, 10)) . (strlen($arg) > 10 ? ' ...' : '') . '\'' : '%s';
						}
						$mark = ', ';
					}
				}
				$fun .= ')';
				$error['function'] = $fun;
			}
			if (!isset($error['line'])) {
				continue;
			}
			$phpMsg[] = array('file' => str_replace(array(SITE_PATH, '\\'), array('', '/'), $error['file']), 'line' => $error['line'], 'function' => $error['function']);
		}
		self::showError($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

		$message = self::clear($message);
		$time = time();
		$file = LOG_PATH . '/' . date('Y.m.d') . '_errorlog.php';
		$hash = md5($message);

		$userId = 0;
		$ip = get_client_ip();

		$user = '<b>User:</b> userId=' . intval($userId) . '; IP=' . $ip . '; RIP:' . $_SERVER['REMOTE_ADDR'];
		$uri = 'Request: ' . htmlspecialchars(self::clear($_SERVER['REQUEST_URI']));
		$message = "<?php exit;?>\t{$time}\t$message\t$hash\t$user $uri\n";

		// 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, 'rb');
			$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("\n", $data);
				if (is_array($array))
					foreach ($array as $key => $val) {
						$row = explode("\t", $val);
						if ($row[0] != '<?php exit;?>') {
							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("\t", "\r", "\n"), " ", $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('SITE_DEBUG') && SITE_DEBUG)) {
			$message = str_replace($dbConfig['database'], '***', $message);
			//$message = str_replace($dbConfig['prefix'], '***', $message);
			$message = str_replace(C('DB_PREFIX'), '***', $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 = '') {
		global $_G;

		$errorMsg = str_replace(SITE_PATH, '', $errorMsg);
		ob_end_clean();
		$host = $_SERVER['HTTP_HOST'];
		$title = $type == 'db' ? 'Database' : 'System';
		echo <<<EOT
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
	<title>$host - $title Error</title>
	<meta http-equiv="Content-Type" content="text/html; charset={$_G['config']['output']['charset']}" />
	<meta name="ROBOTS" content="NOINDEX,NOFOLLOW,NOARCHIVE" />
	<style type="text/css">
	<!--
	body { background-color: white; color: black; font: 9pt/11pt verdana, arial, sans-serif;}
	#container {margin: 10px;}
	#message {width: 1024px; color: black;}
	.red {color: red;}
	a:link {font: 9pt/11pt verdana, arial, sans-serif; color: red;}
	a:visited {font: 9pt/11pt verdana, arial, sans-serif; color: #4e4e4e;}
	h1 {color: #FF0000; font: 18pt "Verdana"; margin-bottom: 0.5em;}
	.bg1 {background-color: #FFFFCC;}
	.bg2 {background-color: #EEEEEE;}
	.table {background: #AAAAAA; font: 11pt Menlo,Consolas,"Lucida Console"}
	.info {
		background: none repeat scroll 0 0 #F3F3F3;
		border: 0px solid #aaaaaa;
		border-radius: 10px 10px 10px 10px;
		color: #000000;
		font-size: 11pt;
		line-height: 160%;
		margin-bottom: 1em;
		padding: 1em;
	}

	.help {
		background: #F3F3F3;
		border-radius: 10px 10px 10px 10px;
		font: 12px verdana, arial, sans-serif;
		text-align: center;
		line-height: 160%;
		padding: 1em;
	}

	.sql {
		background: none repeat scroll 0 0 #FFFFCC;
		border: 1px solid #aaaaaa;
		color: #000000;
		font: arial, sans-serif;
		font-size: 9pt;
		line-height: 160%;
		margin-top: 1em;
		padding: 4px;
	}
	-->
	</style>
</head>
<body>
<div id="container">
<h1>$title Error</h1>
<div class='info'>$errorMsg</div>
EOT;
		if (!empty($phpMsg)) {
			echo '<div class="info">';
			echo '<p><strong>PHP Debug</strong></p>';
			echo '<table cellpadding="5" cellspacing="1" width="100%" class="table"><tbody>';
			if (is_array($phpMsg)) {
				echo '<tr class="bg2"><td>No.</td><td>File</td><td>Line</td><td>Code</td></tr>';
				foreach ($phpMsg as $k => $msg) {
					$k++;
					echo '<tr class="bg1">';
					echo '<td>' . $k . '</td>';
					echo '<td>' . $msg['file'] . '</td>';
					echo '<td>' . $msg['line'] . '</td>';
					echo '<td>' . $msg['function'] . '</td>';
					echo '</tr>';
				}
			} else {
				echo '<tr><td><ul>' . $phpMsg . '</ul></td></tr>';
			}
			echo '</tbody></table></div>';
		}
		echo <<<EOT
</div>
</body>
</html>
EOT;
		exit();
	}
}

/**
 * DB异常类
 *
 * @author 52php.cnblogs.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 = '', $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：