PHP Type Declarations: make your PHP code easier to read, and simpler to use

PHP for Beginners course: ➤ davehollingworth.net/phpy
PHP MVC course: ► davehollingworth.net/phpmvcy
CodeIgniter 4 course: ► davehollingworth.net/codeigni...
PHP is a dynamically-typed language. This means that variables don't have a fixed type. However, PHP does have an optional strong type system: type declarations (previously known as type hints). In this video we'll see how using this will make your code simpler, easier to read, and easier to maintain.
Resources:
www.php.net/manual/en/languag...
www.php.net/manual/en/languag...
www.php.net/manual/en/languag...
Code shown in the video:
gist.github.com/daveh/24e87e3...
00:00 Intro
00:30 Types in PHP
00:49 Type juggling
02:00 Function arguments
04:40 Type declarations
07:05 Strict type mode
08:15 Available types
08:46 Return values
09:00 Class properties
09:20 Union types
09:30 Nullable
10:02 Summary
#PHP #PHP8

[@moraaoo4889]

the was the third video to me about this to watch, and the first video make me understand :)

[@emperoroftheearth3215]

The way you explain is amazing and easy to understand.. thanks

[@williamsa51]

Excellent, Dave, thanks a lot.

[@persiansayed]

Great explanation!
Thank you.

[@giorgiobarone9784]

As always a great apportation by you

[@karenmelikyan377]

The simplicity of explanation speaks of high professionalism. Good job! Thanks.

[@sameera-dananjaya-wijerathna]

good explanation ! thanks !

[@s3raph443]

Спасибо 🙏💕

[@mahfoudhani1252]

thank you it is well

[@ademineshat]

Thanks 👍

[@andrew.schaeffer4032]

Thanks for the helpful video! I'll probably be taking your courses and wonder if you have any suggestions for learning Apache? It keeps coming up, and I think it'd make my life a lot easier if I understood it instead of just guessing and copying code.

[@dave-hollingworth]

Once Apache is installed, you don't usually need to configure it much, especially if you use something like XAMPP. There's a good tutorial here though if you're interested: www.guru99.com/apache.html

[@andrew.schaeffer4032]

@@dave-hollingworth Thanks!

[@_Mikekkk]

What php editor do you use and how do you run this code in command line?

[@dave-hollingworth]

Visual Studio Code, running the code using the regular command prompt application. You can run interactive PHP with the -a flag, e.g. php -a

[@sergey_gabrielyan1001]

Hello, I want to know, is it possible to give type hinting to roles and permissions separately?
public function getRoles(): array
{
if (Gate::allows('role_access')) {
$roles = Role::with('permissions')->orderBy('id', 'DESC')->get();
$permissions = Permission::all();
return [
'roles' => $roles,
'permissions' => $permissions
];
}
}

[@dave-hollingworth]

I'm not sure what you mean - you can add type hints to only individual arguments or return values, you don't have to add them everywhere if you don't want to.

[@sergey_gabrielyan1001]

Thank you so much

[@acos21]

What font is this?

[@dave-hollingworth]

In the editor and on the command line, DejaVu Sans Mono

[@MobiusCoin]

So... I'm a WordPress theme developer so I'm not really a PHP developer. Can you do a video on the PHP interactive mode? I didn't know this existed until now lol.

[@dave-hollingworth]

Ok, will add it to my list!

[@johnydevlin]

why did you write "Course" near $course. What is it called and what is its purpose.

[@dave-hollingworth]

It's the type declaration for the Course class. It declares the function argument as an object of the class "Course"

[@johnydevlin]

@@dave-hollingworth Thank you sir 🙏

[@johnydevlin]

@@dave-hollingworth Sir, Please make video tutorial on Laravel framework

[@marcinzawodnik6317]

👍

[@mohamedab6440]

Error Number: 1054
Unknown column 'category_table.*' in 'field list'
SELECT `id`,`autor_name`,`title`, SUBSTRING(`content`, 1, 300) AS content,`image_url`,`show_first`, `date_creation`,`views`, `featured_for_menu`, `category_table`.`*` FROM `aricle_table`, `category_table` WHERE `aricle_table`. `id_category`= `category_table`.`id_category` ORDER BY `date_creation` DESC LIMIT 7 OFFSET 0
Filename: C:/xampp/htdocs/ArabicBlog/system/database/DB_driver.php
Line Number: 691

[@dave-hollingworth]

The wildcard character * doesn't need delimiting - so instead of `category_table`.`*` use `category_table`.*

[@mohamedab6440]

@@dave-hollingworth Thank you