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Example code of flavienbwk/klogger

Informations about the package klogger

KLogger: Simple Logging for PHP

A project written by Kenny Katzgrau and Dan Horrigan.

Improved by Flavien Berwick for valid JSON handling.

About

KLogger is an easy-to-use PSR-3 compliant logging class for PHP. It isn't naive about file permissions (which is expected). It was meant to be a class that you could quickly include into a project and have working right away.

If you need a logger that supports PHP < 5.3, see past releases for KLogger versions < 1.0.0.

Installation

Composer

From the Command Line:

Basic Usage

Output

PSR-3 Compliant

KLogger is PSR-3 compliant. This means it implements the Psr\Log\LoggerInterface.

See Here for the interface definition.

Setting the Log Level Threshold

You can use the Psr\Log\LogLevel constants to set Log Level Threshold, so that any messages below that level, will not be logged.

Default Level

The default level is DEBUG, which means everything will be logged.

Available Levels

Example

Additional Options

KLogger supports additional options via third parameter in the constructor:

Here's the full list:

Option Default Description
dateFormat 'Y-m-d G:i:s.u' The format of the date in the start of the log lone (php formatted)
extension 'txt' The log file extension
filename [prefix][date].[extension] Set the filename for the log file. This overrides the prefix and extention options.
flushFrequency false (disabled) How many lines to flush the output buffer after
prefix 'log_' The log file prefix
logFormat false Format of log entries
appendContext true When false, don't append context to log entries

Log Formatting

The logFormat option lets you define what each line should look like and can contain parameters representing the date, message, etc.

When a string is provided, it will be parsed for variables wrapped in braces ({ and }) and replace them with the appropriate value:

Parameter Description
date Current date (uses dateFormat option)
level The PSR log level
level-padding The whitespace needed to make this log level line up visually with other log levels in the log file
priority Integer value for log level (see $logLevels)
message The message being logged
context JSON-encoded context

Tab-separated

Same as default format but separates parts with tabs rather than spaces:

$logFormat = "[{date}]\t[{level}]\t{message}";

Custom variables and static text

Inject custom content into log messages:

$logFormat = "[{date}] [$var] StaticText {message}";

JSON

To output pure JSON, set appendContext to false and provide something like the below as the value of the logFormat option. You can use this :

The output will look like:

{"datetime":"2015-04-16 10:28:41.186728","logLevel":"INFO","message":"Message content","context":"{\"1\":\"foo\",\"2\":\"bar\"}"}

Pretty Formatting with Level Padding

For the obsessive compulsive

$logFormat = "[{date}] [{level}]{level-padding} {message}";

... or ...

$logFormat = "[{date}] [{level}{level-padding}] {message}";

Why use KLogger?

Why not? Just drop it in and go. If it saves you time and does what you need, go for it! Take a line from the book of our C-code fathers: "build upon the work of others".

Who uses KLogger?

Klogger has been used in projects at:

* The University of Iowa
* The University of Laverne
* The New Jersey Institute of Technology
* Middlesex Hospital in NJ

Additionally, it's been used in numerous projects, both commercial and personal.

All versions of klogger with dependencies

PHP Build Version
Package Version
Requires psr/log Version ^1.0.0
php Version >=5.3
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