kodus / chrome-logger
PSR-3 (logging), PSR-7 (HTTP) and PSR-15 (middleware) compliant alternative to the original ChromeLogger for PHP
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Requires
- php: >=8.0
- psr/http-message: ^1
- psr/http-server-middleware: ^1
- psr/log: ^1
Requires (Dev)
- codeception/codeception: ^5
- codeception/module-asserts: ^3
- mindplay/middleman: ^4
- mockery/mockery: ^1.5
- nyholm/psr7: ^1.5
README
Alternative to the original ChromeLogger for PHP by Craig Campbell, using:
- PSR-3 compliant interface for logging,
- PSR-7 HTTP message abstraction for the models, and
- PSR-15 compliant middleware for quick integration.
✨ An alternative to the ChromeLogger extension is also available and is highly recommended.
Usage
The logging interface is PSR-3 compliant, so:
$logger = new ChromeLogger(); $logger->notice("awesome sauce!");
Note that this will have a header-size limit by default.
Using a PSR-7 compliant ResponseInterface
instance, such as in a middleware stack, you can populate
the Response as follows:
$response = $logger->writeToResponse($response);
Or just add an instance of the included PSR-15 ChromeLoggerMiddleware
to the top of your middleware stack.
If you're not using PSR-7, emitting the headers old-school is also possible with ChromeLogger::emitHeader()
.
Logging Table Data
Since PSR-3 does not offer any explicit support for tables, we support tables via the context array.
For example:
$logger->info( "INFO", [ "table: SQL Queries" => [ ["time" => "10 msec", "sql" => "SELECT * FROM foo"], ["time" => "20 msec", "sql" => "SELECT * FROM baz"], ] ] );
This works because the "table:"
key prefix in the context array is recognized and treated specially.
Logging a Stack Trace from an Exception
The reserved "exception"
key in PSR-3 context values is supported -
the following will result in a stack-trace:
try { something_dumb(); } catch (Exception $e) { $logger->error("ouch, this looks bad!", ["exception" => $e]); }
Any PHP values injected via the context array will be serialized for client-side inspection - including complex
object graphs and explicit serialization of problematic types like Exception
and DateTime
.
Header Size Limit
Chrome has a 250KB header size limit and many popular web-servers (including NGINX and Apache) also have a limit.
By default, the beginning of the log will be truncated to keep the header size under the limit.
You can change this limit using the ChromeLogger::setLimit()
method - but a better approach is
to enable logging to local files, which will persist in a web-accessible folder for 60 seconds:
$logger->usePersistence("/var/www/mysite/webroot/logs", "/logs");
Note that this isn't supported by the ChromeLogger extension - you will need to install the alternative Server Log Chrome extension instead. (It is backwards compatible with the header-format of the original ChromeLogger extension, so you can use this as a drop-in replacement for the original extension.)
Limitations
We do not currently support log-entry grouping, as supported by the original ChromeLogger for PHP, as this concept is not supported by PSR-3.
We do not make use of the reserved '___class_name'
key used to color-code objects in ChromeLogger, because this
does not work for nested object graphs - instead, we consistently indicate the object type as type
in the console
output, which works well enough, given that object properties are visually qualified with $
prefix in the output.
(Improving this in the future would require changes to the ChromeLogger extension.)
Why?
The original ChromeLogger for PHP has a static API, and aggressively emits headers, making it unsuitable for use in a PSR-15 based (or other) middleware stack. Static classes generally aren't much fun if you enjoy writing testable code.
This library also implements the PSR-3 LoggerInterface
, which makes it easy to substitute this logger
for any other.
Note that, while we aware of the ChromePHPHandler
which comes with the popular logging framework
monolog, kodus/chrome-logger
has no external dependencies
beyond the PSR interfaces, and uses ResponseInterface::withHeader()
to populate PSR-7 Response objects,
as opposed to making header()
calls.