CodeIgniter 4 from Scratch - #11 - Form Validation

In this video of CodeIgniter 4 From Scratch Series we will see what is a Form Validation Library. You will learn how easy it is perform server-side validation that is one of the most common tasks that developers must do in every project.

The goal of this video is to show you how to:
- Initialize Form Helper
- Create Validation Rule sets
- Display errors
- Customize errors
- Create custom rules

CodeIgniter 4 From Scratch Series, the series that are intended to help you get started with CodeIgniter 4 even if you have never worked with PHP frameworks before.

This course will not only help you get started with CodeIgniter but also will help you understand the way PHP Frameworks work.

For more information about Codeigniter 4 Validation Library read the official docs

[ROGERIORIOS]

Very good, good explained, step by step! Great Tutorial

[Vilgodeo]

Thank you very much for this! Really helpful when switching from CI3 to CI4! hope to see more videos in the future 🤞🏽

[bernardoraimundonhampossa]

Obrigado eu acabei quase uma semanda a tentar instar e trabalhar com CodeIgniter, mas quando comecei a assistir seus videos foi tão fácil.

[malachieborohoul]

Thank you so much sir! Yours tutorials help me alot. From Cameroon.

[opentide-vv]

Great tutorial! Many people who want to make their own web applications rapidly would be helped by it.

[sergenorin]

Great tutorials.
Advice: edit your "ou" snippet's last <pre> tag to </pre> and you won't get broken HTML

[giorgiobarone]

Hi Alex, great tutorial! I appreciate a lot the efforts you put in teaching us! Thank you!

[someutubchannel]

Alex, another great tutorial.
Thanks!

[EmersonCabrera]

Great! Thanks man, It is just I was looking for. Regards from Colombia.

[kupkupD]

Hello.. May i ask.. What if we have an array input from Form... How to validate it and send old value into form.. Thankk

[sergeygr]

Hey Alex! What extensions are you using? Can you share them?

[markosmk]

Thank you for the video!! i'm waiting for the libraries video at Codeigniter 4 👍👍

[pgallegoscelis]

I've been trying to validate a dropdownlist that comes with the names of the database users. the problem is that when I add it to the rules array and when executing it it doesn't work for me

[anuragk]

Hey thank you for your tutorials but the problem is that your tutorials are very old, and they have changed a lot in CI 4.3.3 (Latest Release), they have disabled Auto Routing, now we need to route everything.
and nothing works without proper routing.
can you please help me with latest version form validation? with routing?

[rudiejellema]

hello :) why do you pass the parameter by reference and not value in your date_check function?

[nurulraws]

hello, sir. i try use method old input data but not working. can you help me about this?

[rafaelsilva]

como faz para o error aparecer abaixo de cada input ?
Brazil

[danielakintola]

Very helpful tutorial. Thank you. May i known the name of your VSCode theme?

[ahmedsunil]

What extension is that? with Routes, Vars, Views, Files

[rekden]

What about the dynamic table add row ? Can it validate?