Awesome PHP monolog

Monolog is a relatively full and easily extensible logging component under PHP. At present, including Symfony, Laravel, cakephp and many other well-known PHP framework are built-in monolog. Require Monolog/monolog ' ~1.7 ' can be installed via GitHub clone Https://github.com/Seldaek/monolog.git or composer. The Monolog code results are as follows:

errorhandler.php (Set program error hander, exception hander to Mogolog takeover)
formatter/(built-in log display format)
handler/(various log processing classes, such as writing files, sending emails, writing sockets, writing queues, etc.)
logger.php (log processing interface)
processor/(built-in processing log class)
registry.php--

An example with an online error log can replace the default error log processing method

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2. Require __dir__. '/vendor/autoload.php ';
3. Use Monolog\logger;
4. Use Monolog\handler\streamhandler;
5. Use Monolog\handler\bufferhandler;
6. Use Monolog\errorhandler;
7. Use Monolog\processor\memoryusageprocessor;
10. $logger = new Logger (' Error_logger ');
11. $stream = new Streamhandler (__dir__. ') /error.log ', logger::error);
12. $logger->pushhandler (New Bufferhandler ($stream, logger::D Ebug, True, true));// Use Bufferhandler to set the number of logs in the same request up to 10 and then write the file again.
13. Errorhandler::register ($logger);
15. Code ...

Monolog is written entirely in terms of object-oriented thinking, it has a psr-3 prs-4 rule that conforms to the fig, so it is very convenient to expand, and here is an example of a log-in database written on the author's document

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2. Use Monolog\logger;
4. Use Monolog\handler\abstractprocessinghandler;
8. Class Pdohandler extends Abstractprocessinghandler
10. {
12. Private $initialized = false;
14. Private $pdo;
16. Private $statement;
20. Public function __construct (PDO $pdo, $level = Logger::D ebug, $bubble = True)
22. {
24. $this->pdo = $pdo;
26. Parent::__construct ($level, $bubble);
28. }
32. protected function write (array $record)
34. {
36. if (! $this->initialized) {
38. $this->initialize ();
40. }
44. $this->statement->execute (Array (
46. ' Channel ' = $record [' Channel '],
48. ' Level ' = $record [' Level '],
50. ' Message ' = $record [' Formatted '],
52. ' Time ' = $record [' DateTime ']->format (' U '),
54. ));
56. }
60. Private Function Initialize ()
62. {
64. $this->pdo->exec (
66. ' CREATE TABLE IF not EXISTS monolog '
68. .' (channel VARCHAR (255), level integer, Message longtext, time integer UNSIGNED) '
70. );
72. $this->statement = $this->pdo->prepare (
74. ' INSERT into Monolog (channel, level, message, Time) VALUES (: Channel,: Level,: Message,: Time) '
76. );
80. $this->initialized = true;
82. }

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