Dependency Injection 

8 years ago you uploaded this 5 minutes video that has helped me understand this concept that I didn't understand by watching videos and reading articles uploaded and written in 2021 respectively. Thank you mate.

Very good job. 5 minutes to explain what other tutorials take over an hour.

We need more language agnostic tutorials like this!

These 5 minutes have been the most productive minutes of my life. I have seen so many videos and have read about dependency injection, but no one has explained it so well. Thank you Anthony Ferrera. Keep up your good work.

you know it's a timeless video when 10 years later I'm still watching it.

This is absolutely fantastic. Brilliantly explained. Went from being iffy on the concept to totally getting it (at least as far as the video explains). Great job.

I believe this is the BEST tutorial explaining this abstract concept in RU-vid. Thank you!!

Now thats what I call a real tutorial...clear concise and hit the nail on the head....looking forward to many such tutorials from you Sir.

Holy crap this is one of the simplest most straightforward explanations for something I've spent a real long time trying to totally wrap my head around. Awesome job and thanks!

Others have already said it but this is definitely the best explanation on RU-vid. Your video on mediators was great too. I really hope you make more of these videos about design patterns and programming concepts.

OMG! I finally get it. This is the clearest explaination that I've ever heard on DI. Proof that the teacher makes all of the difference. Thanks you Anthony. +1

5 minutes of clear explanation ...there is a plethora of explanations of DI out there that cloud over (obfuscate) the very simple and central themes of DI...this video is straight to the point...Thanks Anthony...

This may be the most clear and concise coverage of this topic I've ever encountered. You've earned my subscription :)

Awesome! I read, watched, searched for a lot of stuff to understand what's Dependy Injection and how and why to use it. In this f** simple video, you explained everything! Thank you!

That's the best explanation for Dependency Injection I've heard so far. I can implement it and know why I should do so, but "Dependancy Injection" remained a foreign word to me, until I saw this video and it clicked.

Still shines like gold, 6 years later. Amazingly simple, to-the-point, succinct explanation.

Out of the dozen videos I've watched and multiple books I've read through, this was hands down the best explanation of DI I've come across. Even while framework/language agnostic no less. Thank you.

Man! This is the best explanation I have ever heard on dependency injection. Amazing.

Jesus Christ other tutorials take so long to get to the concept, but this one was short and sweet! Thank you very much

very well done. I like how he basically explained dependency inversion in the same tutorial. was struggling with both concepts. now both are crystal clear.

Perfectly clear and simple for all languages that use DI. This isn't even for Java and 100 times better than Java DI videos ... Bravo!

I watched several videos explaining this and this was the most direct, clear, and shortest video. Well done 👍

Thank you for taking the time to put this together and sharing. Its amazing what you can get out of 5 (well done) minutes. Very helpful!

this is just the best DI explanation i've ever seen !

This is the BEST explination i have ever seen since i started learning programing, such a great way to explain the logic which most of us struggle with :)

Thank you! This was the best explanation of Dependency Injection that I've seen so far.

THANK YOU, for this! I've seen like 5 videos before this, but yours was the shortest, cleanest and I can finally say I understand the principle after watching it!

looking for a simple explanation about the topic, and found this 7 years old video is actually the best one that I've found.. thank you.

I come back to this video so much, it's literally the best explanation of dependency injection.

These last couple of days I've been looking into dependency injection quite a bit: how to do it, why to do it etc. etc, and while I understood what was being said, I didn't have a clue how it all fit together. You explained the workflow clearly and concisely, and it made all the pieces fall into place! Thank you very much ^^

This is the best explanation for DI I have come across.

10 years ago, but your guide is: - short - easy to understand I am very grateful to you for that!

I love your screencasts! You do such a good job of explaining new/complex concepts. Please keep doing them!

8 years later... and this video is as relevant today as it was when it was uploaded!

Thanks, it took me just 5 min to fully understand DI with your explaination, very clear.

Thank you for taking out time to make this video all those years ago. Much appreciated toay.

I've been struggling to understand DI for while. This was so clear and understandable. Thank you good sir!

I saw the video in the library, without headphones, just with the subtitles... even then was perfectly explained, thanks a lot!

Wow I am amazed by this video, such an elegant explanation! The best tutorial on dependency injection by far

wow.... I would say old but gold for this video. straight to the point, very clear and it's just 5 min. Thank you

After exactly 10 years, thank you!

The way you explained it by the example is marvelous. Only by this video I understood dependency injection.

Brilliantly explained! Its all because your concepts are so clear ....

This is the best explanation of DI I've ever seen! Thanks Antony Ferrara!

Anthony, this is brilliant. Very succinct and at the same time clear and easy to visualize and follow thanks to you writing and drawings.

This is the best tutorial I've ever found about this topic. To put in practice I recommend laracast's The PHP Practitioner free course. PS.: Just figured out that ircmaxell is your blog, man. I already read some posts that are really great, thanks for sharing your knowledge. You are a really good teacher.

I appreciate the unique format used in presenting information in this video.

wow..i have watched many videos before related to CI. this is the best out of best.great stuff Anthony..You are truly a master of explaining complex stuff in a simpler manner. Keep it up.Well done and thank you very much. :)

best explanation I have ever heard. Clear and concise.

Simple and concise... Thanks very much for your time explaining this!

Very well explained! The "wall-building robot" example was excellent in explaining decoupling!

Best explanation of Dependency Injection I've ever seen.

I'll have an interview soon and this is the best video I could find about DI.

Very well done. Great explanation and clear delivery. Can't wait to see more.

this is the best tutorial about dependency injection! Extremely easy to understand!

Thanks, by far the best explanation about DI and its usage. Thanks!!

Your videos are so great to understand complex things. Please keep going. Thanks for your work.

Amazing! Love your explanation, with pictures!!

Anthony, loved your video. It's clear, quick and to the point.10X!

You made me believe of the power of briefly 💪 please keep doing all the up coming videos just like that. Awesome 👏

Thanks man. People like you make the world go round.

Wow, i'm only beginning to learn how to code and this video just broke what was an unreachable concept for my mind into something that was so understandable. Thank you sir!

Upon further reflection, this is the best and most succinct explanation of DI.

THANK YOU for finally explaining this in a simple matter. Once again your videos have helped me.

don't leave us Anthony, you are a great asset for the php community, great videos

I've always read about this in various articles, but it always comes across as a bunch of words trying to explain something to me, but relies on further reading of other related principles which ultimately just makes it more confusing. Sure it's good for the SEO of your website but it just doesn't help someone who just needs a simple answer. Luckily, I found this video. Straight to the point with a really easy-to-understand analogy.

Really awsome , it takes 5 min to understand what other tutorial take hours, very good job, and thank you

That was a very clean explanation of a rather seemingly complex concept. Thanks for putting this up :)

How is this guy not popular on the YT programming scene. If you're reading this... put out more videos dude, SO HELPFUL!

seriously this is gold explanation ! salute

Wonderful!!!! The wall-building robot was genius!

Great great great! We need more of these abstractions!

The end ...: "Use dependency injection. It may one day save your life." :D

People like you make this world awesome. thanks for the explanation

It's really helpful for me even now. You are a great teacher!

Brilliantly explained! Really love your teaching style

The best part is the introduction of the Dependency Injection Container(DIC), which let me understand how dependency injection really happens!

Clearest explanation in youtube!

Thank you for this video. I like your presentation style. Great way to explain concepts, and makes it more concrete in terms of understanding how it is applied in code.

Markus, I completely understand that view-point. My analogy was aimed at the construction phase of an object (__construct), not the writing phase. So from that standpoint I think the analogy makes sense (you shouldn't construct a door while constructing the house). But I definitely see your point (perhaps I should have clarified it better). Thanks for the feedback!

Awesome work 🙂 Clear and concise.

Simple ,Clear , Useful Explation

I don't know how to thank you for this fantastic tutorial. So easy to understand so interesting....

Uploaded 7 years back but it was neat explanation. Thanks mate :)

This was a great video, perfect for the visual learner like myself. The drawings helped alot.

I subscribed because of this video. Straight to the point

Thanks It's clear you have a very deep understanding of the subject in order to make such a concise video. Kudos!

They don't teach you these things in school - not like this at least. Thank you, this was great!

Your video was very helpful. It explained DI in a straight-forward, interesting way.

Very illustrative, easy to follow and understand.

Brief and clear explanation. Thanks a lot!

Wow best explanation so far!

Great job, simple explanation, also liked very much the format you used for your video. Keep up the good work!

Amazing! Great timbre, information and visualization.

Oh wow, thank you very much. I wish you would have found your channel earlier! This is the way anything should be taught! Thanks again!!!

Holy s**t. That was awesome. Congratulations man, very nice explanation.

Great video, very clear and concise explanation.

This was a very freaking awesome explanation, thank you!

This was so simple short and well explained

Best Explanation about DI.