tp5实现日志记录
1.安装 psr/log
composer require psr/log
它的作用就是提供一套接口，实现正常的日志功能！
我们可以来细细的分析一下，LoggerInterface.php
<?php namespace Psr\Log; /** * Describes a logger instance. * * The message MUST be a string or object implementing __toString(). * * The message MAY contain placeholders in the form: {foo} where foo * will be replaced by the context data in key "foo". * * The context array can contain arbitrary data. The only assumption that * can be made by implementors is that if an Exception instance is given * to produce a stack trace, it MUST be in a key named "exception". * * See https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-3-logger-interface.md * for the full interface specification. */ interface LoggerInterface { /** * System is unusable. * * @param string $message * @param array $context * * @return void */ public function emergency($message, array $context = array()); /** * Action must be taken immediately. * * Example: Entire website down, database unavailable, etc. This should * trigger the SMS alerts and wake you up. * * @param string $message * @param array $context * * @return void */ public function alert($message, array $context = array()); /** * Critical conditions. * * Example: Application component unavailable, unexpected exception. * * @param string $message * @param array $context * * @return void */ public function critical($message, array $context = array()); /** * Runtime errors that do not require immediate action but should typically * be logged and monitored. * * @param string $message * @param array $context * * @return void */ public function error($message, array $context = array()); /** * Exceptional occurrences that are not errors. * * Example: Use of deprecated APIs, poor use of an API, undesirable things * that are not necessarily wrong. * * @param string $message * @param array $context * * @return void */ public function warning($message, array $context = array()); /** * Normal but significant events. * * @param string $message * @param array $context * * @return void */ public function notice($message, array $context = array()); /** * Interesting events. * * Example: User logs in, SQL logs. * * @param string $message * @param array $context * * @return void */ public function info($message, array $context = array()); /** * Detailed debug information. * * @param string $message * @param array $context * * @return void */ public function debug($message, array $context = array()); /** * Logs with an arbitrary level. * * @param mixed $level * @param string $message * @param array $context * * @return void */ public function log($level, $message, array $context = array()); }
这是一套日志正常的接口，有层级，有消息，有具体的内容。
LogLevel.php
<?php namespace Psr\Log; /** * Describes log levels. */ class LogLevel { const EMERGENCY = 'emergency'; const ALERT = 'alert'; const CRITICAL = 'critical'; const ERROR = 'error'; const WARNING = 'warning'; const NOTICE = 'notice'; const INFO = 'info'; const DEBUG = 'debug'; }
定义一些错误常量。
AbstractLogger.php实现接口
<?php namespace Psr\Log; /** * This is a simple Logger implementation that other Loggers can inherit from. * * It simply delegates all log-level-specific methods to the `log` method to * reduce boilerplate code that a simple Logger that does the same thing with * messages regardless of the error level has to implement. */ abstract class AbstractLogger implements LoggerInterface { /** * System is unusable. * * @param string $message * @param array $context * * @return void */ public function emergency($message, array $context = array()) { $this->log(LogLevel::EMERGENCY, $message, $context); } /** * Action must be taken immediately. * * Example: Entire website down, database unavailable, etc. This should * trigger the SMS alerts and wake you up. * * @param string $message * @param array $context * * @return void */ public function alert($message, array $context = array()) { $this->log(LogLevel::ALERT, $message, $context); } /** * Critical conditions. * * Example: Application component unavailable, unexpected exception. * * @param string $message * @param array $context * * @return void */ public function critical($message, array $context = array()) { $this->log(LogLevel::CRITICAL, $message, $context); } /** * Runtime errors that do not require immediate action but should typically * be logged and monitored. * * @param string $message * @param array $context * * @return void */ public function error($message, array $context = array()) { $this->log(LogLevel::ERROR, $message, $context); } /** * Exceptional occurrences that are not errors. * * Example: Use of deprecated APIs, poor use of an API, undesirable things * that are not necessarily wrong. * * @param string $message * @param array $context * * @return void */ public function warning($message, array $context = array()) { $this->log(LogLevel::WARNING, $message, $context); } /** * Normal but significant events. * * @param string $message * @param array $context * * @return void */ public function notice($message, array $context = array()) { $this->log(LogLevel::NOTICE, $message, $context); } /** * Interesting events. * * Example: User logs in, SQL logs. * * @param string $message * @param array $context * * @return void */ public function info($message, array $context = array()) { $this->log(LogLevel::INFO, $message, $context); } /** * Detailed debug information. * * @param string $message * @param array $context * * @return void */ public function debug($message, array $context = array()) { $this->log(LogLevel::DEBUG, $message, $context); } }
Logger.php继承AbstractLogger.php