PSR-12 – Extended Coding Style guide

PSR-12 is a revised coding style guide of PSR-2 that takes PHP 7 into account. The PSR-12 specification was approved on 9 August 2019. Since PSR-2 was accepted in 2012, many changes have been made to PHP that have had some impact on coding style guidelines, the most notable of which is return type declarations, which are introduced in PHP 7 and not described in PSR-2. Hence, a standard should be defined for using them so that they can be adopted by the wider PHP community before individual PHP coders implement their standards, which might conflict with each other eventually.

For example, the return type declarations that have been added in PHP 7 simply specifies the type of value that a function should return. Let's take a look at the following function, which adopts the return type declarations:

declare(strict_types = 1);

function returnInt(int $value): int
{
    return $value;
}

print(returnInt(2));

You will get the correct...