Dependency Injection in PHP | Create a Service Container from Scratch

Dependency Injection in PHP | Create a Service Container from Scratch | Use PHP-DI

Рет қаралды 3,927

Күн бұрын

Learn what dependency injection is, and how to do it in PHP.
Please consider supporting my channel: ☕ ko-fi.com/davehollingworth
Topics covered:
• Dependency injection
• Service containers
• Autowiring
• Third-party DI containers like PHP-DI
All source code shown is free to download:
‣ gist.github.com/daveh/80901d2...
Links shown in the video:
‣ laravel.com/docs/10.x/container
‣ symfony.com/doc/current/compo...
‣ www.php.net/manual/en/reflect...
‣ php-di.org/
Videos:
‣ Securely Storing PHP Configuration Settings
• Securely Storing PHP C...
Image used in thumbnail:
‣ www.freepik.com/icon/uml_9539813
00:00 Introduction
00:22 What is dependency injection?
03:46 Create a DI container
05:27 Autowiring
11:00 Defining services
13:52 Use PHP-DI
15:48 Summary
#PHP #dependencyinjection #laravel #symfony

Пікірлер: 33

@dave-hollingworth 5 ай бұрын

Complete PHP MVC course: davehollingworth.com/go/phpmvc

@slaybryn5504 2 ай бұрын

i bought this in udemy. Keep updating sir

@danimatuko 5 ай бұрын

The way you explain such complicated topics is amazing 👏🏾

@efbYouTube 5 ай бұрын

no doubt! he's a HUGE resource!!

@someutubchannel69 4 ай бұрын

Great Teacher! I have 4 Udemy courses from him! He Masters PHP! 😎👍

@iam.masoudsamimi Ай бұрын

The PHP 🧙‍♂ wizard as always to the point with simple explanations. Loved it. Thank you.

@dannymason3970 4 ай бұрын

Excellent instructor and clearly very competent on the subject matter. Please consider a course on using/accessing.a PHP application with SSO/Entra.

@AndrewKwabula 4 ай бұрын

At Uni I chose to do a Developmental project and it was building a web service for an MSc course. I enrolled in Dave's API course on Udemy. The webs service was being consumed by Embassy websites. I tried several courses on Udemy and other sites only Dave's API course was helpful. It was also the shortest yet it covered everything I needed including detailed JWT Authentication. Dave's understanding of PHP is amazing, I guess he now dreams in PHP.

@suyeounlee5325 5 ай бұрын

Dave is very X 3 excellent teacher.

@alan-overthenet 5 ай бұрын

Great, Dave, thank you

@user-db1is9uu4i 5 ай бұрын

another great explanation 🎉

@igorolikov1997 2 ай бұрын

best!

@m.moonsie 2 ай бұрын

Amazing!!

@sayapovr 4 ай бұрын

Thank You 👍

@rustamergashev7278 Ай бұрын

👍

@abdelhamidnehlil7277 5 ай бұрын

merci!

@alalyrealestate1136 4 ай бұрын

Thank you Dave for all your tutorials. Do you have or plan for a Laravel tutorial? Are there any new full tutorial coming? and thanks again

@dave-hollingworth 4 ай бұрын

No plans for a Laravel tutorial at the moment, but I'm currently working on a full Slim tutorial series of videos, which I hope to have ready soon!

@alalyrealestate1136 4 ай бұрын

@@dave-hollingworth Waiting for you to finish .. and thanks for all your excellent materials

@jediampm 5 ай бұрын

HI, the simplest and best explanation. Thanks. Now is missing a video about php as template system like plates, how organize using section / blocks or template Inheritance and base layouts. Please update your PHP unit course, which i already bought, to v10. And if possible, do first a video (overview) about Pest lib for testing and later on a full course on udemy. Thanks.

@NedumEze 5 ай бұрын

Thank you Dave. That was magnificent. I wish that your words during your presentation are captured as comments for each line. May I ask? The way you structured your psr-4 autoload setting: "": "sec/", will it still work if your Classes had namespaces?

@dave-hollingworth 5 ай бұрын

Yes, if your class files are in folders that match the namespaces, autoloading will still work

@hongpair 4 ай бұрын

@@dave-hollingworth sire 🙏 I'm having issues on php undefined array key in php _post when I want to submit a form please help me I have tried isset($_POST['userName']); also use myqli_real_escape_string but still showing undefined Array key on line......... When I submit a form

@dave-hollingworth 4 ай бұрын

@@hongpairCheck your form is using the POST method when you submit it (method="post")

@hongpair 4 ай бұрын

@@dave-hollingworth yes I'm using $_POST()

@Alleo-zl9fp 3 ай бұрын

hi @dave may i know what Text editor you are using ??

@dave-hollingworth 3 ай бұрын

Visual Studio Code, but with most of the helpers disabled so they're not a distraction when teaching!

@tariksadiku4723 17 күн бұрын

Hi, I wanted to ask a question, how do I resolve classes through DI that need runtime parameters? For example, if I have a UserService that in it's constructor will accept a User Model (say a User in Laravel), how do I inject this UserService as a dependency? I was thinking maybe I can have a setter injection instead of a constructor so that wherever I inject the class as a dependency itself, I call it's setter method to set the User for that UserService and then go through the logic I need to go through, is this a smart idea?

@dave-hollingworth 17 күн бұрын

Absolutely, you can define services that need parameters , and inject them using the constructor or a setter method, it's up to you .

@tariksadiku4723 16 күн бұрын

@@dave-hollingworth In the case where the parameters are runtime only, would you say it's better to use a setter injection (userService.setUser($user)) instead of creating a new userService and then passing the $user in its constructor? (new UserService $userService ($user))

@dave-hollingworth 16 күн бұрын

In most cases it doesn't really make much difference, it's down to personal preference - although if you need to get a user object at runtime (e.g. as the result of an action like logging in) then it might be simpler to use setter injection.