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What PHP libraries does this tutorial use?
// composer.json
{
"require": {
"php": ">=8.1",
"ext-ctype": "*",
"ext-iconv": "*",
"knplabs/knp-time-bundle": "^1.18", // v1.19.0
"symfony/asset": "6.1.*", // v6.1.0-RC1
"symfony/console": "6.1.*", // v6.1.0-RC1
"symfony/dotenv": "6.1.*", // v6.1.0-RC1
"symfony/flex": "^2", // v2.4.5
"symfony/framework-bundle": "6.1.*", // v6.1.0-RC1
"symfony/http-client": "6.1.*", // v6.1.0-RC1
"symfony/monolog-bundle": "^3.0", // v3.8.0
"symfony/runtime": "6.4.3", // v6.4.3
"symfony/twig-bundle": "6.1.*", // v6.1.0-RC1
"symfony/ux-turbo": "^2.0", // v2.1.1
"symfony/webpack-encore-bundle": "^1.13", // v1.14.1
"symfony/yaml": "6.1.*", // v6.1.0-RC1
"twig/extra-bundle": "^2.12|^3.0", // v3.4.0
"twig/twig": "^2.12|^3.0" // v3.4.0
},
"require-dev": {
"symfony/debug-bundle": "6.1.*", // v6.1.0-RC1
"symfony/maker-bundle": "^1.41", // v1.42.0
"symfony/stopwatch": "6.1.*", // v6.1.0-RC1
"symfony/web-profiler-bundle": "6.1.*" // v6.1.0-RC1
}
}
2 Comments
OK, I am beginning to understand how services work. Since the service objects only contain methods, they only need to be intantiated once. Is this right?
Perhaps Symfony uses some call to
is_object()with a standard object name which is associated to the service, and creates the object (when not found) using the class namespace?Hey Francois,
Well, it's more complex behind the hood, in general, the container knows how to instantiate any object he knows about... and it instantiates an object only then when you're requesting it. i.e., you may register a hundred services, but if you will try to get only 2 of them on the 1 page - the container will instantiate only them. Well, if speak simple words... you can read Symfony docs to know more about Symfony container and dependency injection in general.
Well, services for sure may have not only methods also some properties to hold some data, or references to other objects (dependencies), but the idea is to instantiate services only when you need them, you may think of it as "lazy" instantiating on request :)
I hope this helps!
Cheers!
"Houston: no signs of life"
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