#3: Liskov substitution principle (LSP) in PHP, Laravel | SOLID Design Principles

[@QiroLab]

SOLID design principles Playlist
ruclips.net/p/PL1TrjkMQ8UbWsspx0ABrsWl6ENnLEq9AH
⌚ Timestamps:
00:00 Introduction / Definition
08:17 Rule 1: Parameter types must match in both child and parent classes
09:22 Rule 2: Method return type must match
11:10 Rule 3: Preconditions cannot be strengthened by the child's class
11:45 Rule 4: Postconditions cannot be weakened in the child's class
14:11 Rule 5: Exceptions thrown by the child method must be the same as from an exception thrown by the parent method.
15:09 Rule 6: Invariants of a superclass must be preserved
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[@badger1741]

why do you say xyz is a children of abc when it looks like it's not

[@shoorace]

Yep. It's not a proper illustration of parent and child classes.

[@chooticharika]

I also got confused. The parent and child explanation is not quite right here. But overall he managed to explain the principle.

[@arunraj9989]

@@chooticharika me too

[@JasonTodd-j4r]

last 2 video was perfect but parent child class example was annoying as hell in this video, i rewatched it 3 times i am still confused.

[@OnlyJavascript]

Clear explanation. Thanks for the knowledge share.

[@QiroLab]

Glad you liked it

[@OnlyJavascript]

Could you please cover these packages? Breeze, Cashier (Stripe), Fortify,Octane, Passport, Sanctum, Scout, Socialite, Telescope. It will be so much helpful for us.

[@QiroLab]

I have already created videos on some of them, these are:
➤ Laravel Breeze Tutorial
🔗 ruclips.net/video/75ZigCGvR-4/видео.html
➤ Laravel Themer, alternative of Laravel Breeze
🔗 ruclips.net/video/Ty4ZwFTLYXE/видео.html
➤ Laravel Fortify Playlist
🔗 ruclips.net/video/CLsyHP7x0N0/видео.html
➤ Laravel Passport Playlist
🔗 ruclips.net/video/UKSQdg1uPbQ/видео.html
➤ Laravel Sanctum Playlist
🔗 ruclips.net/video/8Uwn5M6WTe0/видео.html
I will cover the remaining packages also soon.

[@OnlyJavascript]

@@QiroLab Thank you so much. Your works are truly amazing. I tried many tuts on YT but your content is really clean and simple to understand. Keep up this amazing work, bro.

[@QiroLab]

I am so glad you like my videos. Thank you.

[@adityakadam2256]

Thanks a ton for such a great video. From all the RUclips videos on Liskov princples yours stands out. You explained it so well like just in first 5 mins, it was super clear. Thanks a ton.

[@SVGamesLab]

Great video! Please make some more usages in Laravel of this. Kind Regards

[@QiroLab]

Thank you! Cheers!

[@luckyboy9339]

You are the best brother! Thanks!

[@azengakevin2310]

Good for a days start, I do inheritance wrongly most of the time pre & post conditions

[@QiroLab]

Glad you liked it

[@Laflamablanca969]

Great explanation

[@QiroLab]

Thanks

[@vibhakarkumarvidagdha7956]

Hi

[@QiroLab]

hello