Zend Framework中文手册

Zend_Log_Writer_Stream 写入日志数据到 PHP 流中.

要把日志写入到输出缓冲区,使用URLphp:://output. 或则你可以直接发送日志数据到像STDERR 这样的流中(php://stderr).

$writer = new Zend_Log_Writer_Stream('php://output');
$logger = new Zend_Log($writer);

$logger->info('Informational message');

      

写入日志数据到一个文件,使用Filesystem URLs之一:

$writer = new Zend_Log_Writer_Stream('/path/to/logfile');
$logger = new Zend_Log($writer);

$logger->info('Informational message');

      

默认情况流一个追加("a")的方式打开.要以不同的模式打开,Zend_Log_Writer_Stream 构造函数接受第二个参数作为可选的模式参数.

Zend_Log_Writer_Stream还接受一个现有的流资源:

$stream = @fopen('/path/to/logfile', 'a', false);
if (! $stream) {
    throw new Exception('Failed to open stream');
}

$writer = new Zend_Log_Writer_Stream($stream);
$logger = new Zend_Log($writer);

$logger->info('Informational message');

      

你不能给现有的流资源指定模式.这样作将导致抛出一个Zend_Log_Exception异常.

Zend_Log_Writer_Db使用Zend_Db写入日志信息到数据库表中. Zend_Log_Writer_Db的构造函数接受一个Zend_Db_Adapter 实例,一个表名,和一个数据库字段到事件数据项的映射:

$params = array ('host'     => '127.0.0.1',
                 'username' => 'malory',
                 'password' => '******',
                 'dbname'   => 'camelot');
$db = Zend_Db::factory('PDO_MYSQL', $params);

$columnMapping = array('lvl' => 'priority', 'msg' => 'message');
$writer = new Zend_Log_Writer_Db($db, 'log_table_name', $columnMapping);

$logger = new Zend_Log($writer);

$logger->info('Informational message');

      

上面的例子写入单个行到名称为log_table_name的数据库表中.数据库字段lvs 接收优先级号,名为msg的字段接收日志消息.

Zend_Log_Writer_Firebug sends log data to the Firebug Console.

All data is sent via the Zend_Wildfire_Channel_Httpheaders component which uses HTTP headers to ensure the page content is not disturbed. Debugging AJAX requests that require clean json and XML responses is possible with this approach.

Requirements:

// Place this in your bootstrap file before dispatching your front controller
$writer = new Zend_Log_Writer_Firebug();
$logger = new Zend_Log($writer);

// Use this in your model, view and controller files
$logger->log('This is a log message!', Zend_Log::INFO);

      

$writer = new Zend_Log_Writer_Firebug();
$logger = new Zend_Log($writer);

$request = new Zend_Controller_Request_Http();
$response = new Zend_Controller_Response_Http();
$channel = Zend_Wildfire_Channel_HttpHeaders::getInstance();
$channel->setRequest($request);
$channel->setResponse($response);

// Start output buffering
ob_start();

// Now you can make calls to the logger

$logger->log('This is a log message!', Zend_Log::INFO);

// Flush log data to browser
$channel->flush();
$response->sendHeaders();

      

$logger->addPriority('FOO', 8);
$writer->setPriorityStyle(8, 'TRACE');
$logger->foo('Foo Message');

      

$writer->setDefaultPriorityStyle('TRACE');

      

$exception = new Zend_Exception('Test exception');
$logger->err($exception);

      

$writer->setPriorityStyle(8, 'TABLE');
$logger->addPriority('TABLE', 8);

$table = array('Summary line for the table',
             array(
                 array('Column 1', 'Column 2'),
                 array('Row 1 c 1',' Row 1 c 2'),
                 array('Row 2 c 1',' Row 2 c 2')
             )
            );
$logger->table($table);

      

Zend_Log_Writer_Null是一个不向任何地方写入任何数据的存根. 用于在测试期间关闭或踩熄日志.

$writer = new Zend_Log_Writer_Null;
$logger = new Zend_Log($writer);

// goes nowhere
$logger->info('Informational message');

      

Zend_Log_Writer_Mock是一个非常简单的Writer,它纪录所接收到的原始的数据到到作为public属性的 数组中.

$mock = new Zend_Log_Writer_Mock;
$logger = new Zend_Log($mock);

$logger->info('Informational message');

var_dump($mock->events[0]);

// Array
// (
//    [timestamp] => 2007-04-06T07:16:37-07:00
//    [message] => Informational message
//    [priority] => 6
//    [priorityName] => INFO
// )

      

清空有mock记录的日志,设置$mock->events = array()即可.

没有复合Writer对象,但是一个Log实例可以有任意个Writer.使用addWriter方法 添加Writer:

$writer1 = new Zend_Log_Writer_Stream('/path/to/first/logfile');
$writer2 = new Zend_Log_Writer_Stream('/path/to/second/logfile');

$logger = new Zend_Log();
$logger->addWriter($writer1);
$logger->addWriter($writer2);

// goes to both writers
$logger->info('Informational message');