This library contains a micro-kernel for bootstrapping almost any PHP application, including Silex, Symfony Console and Lumen. The kernel itself is just about 400 lines of code to set a bunch of default parameters for your application and create a service container instance with that. To see a complete framework based on the micro-kernel please go to https://github.com/symlex/symlex.
Creating a kernel instance and calling run()
is enough to start your application:
#!/usr/bin/env php
<?php
require_once 'vendor/autoload.php'; // Composer
$app = new \DIMicroKernel\Kernel('console');
$app->run(); // runs the 'app' service defined in config/console.yml
YAML files located in config/
configure the application and all of it's dependencies as a service. The filename matches
the application's environment name (e.g. config/console.yml
). The configuration can additionally be modified
for sub environments such as local or production by providing a matching config file like config/console.local.yml
(see app.sub_environment
parameter). These files are in the same well documented format you might know from Symfony:
parameters:
app.name: 'My App'
app.version: '1.0'
services:
doctrine.migrations.migrate:
class: Doctrine\DBAL\Migrations\Tools\Console\Command\MigrateCommand
app:
class: Symfony\Component\Console\Application
arguments: [%app.name%, %app.version%]
calls:
- [ add, [ "@doctrine.migrations.migrate" ] ]
This provides a uniform approach for bootstrapping Web applications like Silex\Application
or command-line
applications like Symfony\Component\Console\Application
using the same kernel. The result is much cleaner and
leaner than the usual bootstrap and configuration madness you know from many frameworks.
The kernel base class can be extended to customize it for a specific purpose such as long running console applications:
<?php
use DIMicroKernel\Kernel;
class ConsoleApp extends Kernel
{
public function __construct($appPath, $debug = false)
{
parent::__construct('console', $appPath, $debug);
}
public function setUp()
{
set_time_limit(0);
ini_set('memory_limit', '-1');
}
}
The kernel sets a number of default parameters that can be used for configuring services. The default values can be
changed via setter methods of the kernel or overwritten/extended by container config files
and environment variables in $_SERVER
(names are converted to lower case and __
is converted to .
).
Parameter | Getter method | Setter method | Default value |
---|---|---|---|
app.name | getName() | setName() | 'Kernel' |
app.version | getVersion() | setVersion() | '1.0' |
app.environment | getEnvironment() | setEnvironment() | 'app' |
app.sub_environment | getSubEnvironment() | setSubEnvironment() | 'local' |
app.debug | isDebug() | setDebug() | false |
app.charset | getCharset() | setCharset() | 'UTF-8' |
app.path | getAppPath() | setAppPath() | './' |
app.config_path | getConfigPath() | setConfigPath() | './config' |
app.base_path | getBasePath() | setBasePath() | '../' |
app.storage_path | getStoragePath() | setStoragePath() | '../storage' |
app.log_path | getLogPath() | setLogPath() | '../storage/log' |
app.cache_path | getCachePath() | setCachePath() | '../storage/cache' |
app.src_path | getSrcPath() | setSrcPath() | '../src' |
If debug mode is turned off, the service container configuration is cached by the kernel in the directory set as cache path. You have to delete all cache files after updating the configuration. To disable caching completely, add container.cache: false
to your configuration parameters:
parameters:
container.cache: false
If you are using composer, simply add "symlex/di-microkernel" to your composer.json file and run composer update:
"require": {
"symlex/di-microkernel": "^1.2"
}