Clever Geek Handbook

PHP Digest # 195 (December 14 - 28, 2020)

Fresh selection with links to news and materials. In this issue: Fibers for asynchronous PHP, first native attributes, short match and other RFC proposals for PHP 8.1, tools, many videos, articles and podcasts.



Happy reading and Happy New Year!









PHP Internals



  • [RFC] Fibers - A great proposal for asynchronous PHP. More details were in the Telegram channel . In short, this is an improved version of generators, which will allow you to write asynchronous code based on libraries like ReactPHP / Amp much easier and more understandable.





    Amp v3 is still in development, but already uses fibers instead of promises. Here's an example of what the async / await analog looks like:
    use Amp\Delayed;
use Amp\Loop;
use function Amp\async;
use function Amp\await;

//  ,    int  ,     ,      .
$callback = function (int $id): int {
    return await(new Delayed(1000, $id)); // Await promise resolution.
};

//  $callback  int, but is executed asynchronously.
$result = $callback(1); //      ,  1 .
\var_dump($result);

//      ,        .
$result = await([  //  ,    1 .
    async($callback, 2),
    async($callback, 3),
]);
\var_dump($result); //   2     .
  • [RFC] #[Deprecated] Attribute — PHP 8 , . — #[Deprecated]



    . , #[Deprecated]



    , PHP E_DEPRECATED



    .



    , , .



    , PhpStorm 2020.3. , . , - final, .
  • [RFC] #[NamedParameterAlias] Attribute — PHP 8.1.



    , — . , API .



    RFC: Named Parameters explicit opt in.



    — , , .
    <?php

use NamedParameterAlias;

// Old function signature:
function log($arg1) {}

// New function signature introduces better name
function log(#[NamedParameterAlias("arg1")] $message) {}

log(arg1: "Hello World!");
log(message: "Hello World!");
    Attribute::IS_REPEATABLE



    . , .
  • [RFC] Short match — match



    PHP 8 switch



    .



    switch(true) { ...



    , if-elseif-...else



    . match(true)



    .



    RFC match



    match(true)



    .

    PHP 8.0:
    $a = 3;

print match (true) {
  $a < 2 => 'small',
  $a == 3 => 'medium',
  default => 'large',
};
    		:
    $a = 3;

print match {
  $a < 2 => 'small',
  $a == 3 => 'medium',
  default => 'large',
};
    «».
  • [RFC] Configurable callback to dump results of expressions in `php -a` — Tyson Andre php -a



    .



    bobthecow/psysh, PHP . .
  • [RFC] Add is_list(mixed $value): bool — RFC Tyson Andre. is_list()



    , true



    , 0, 1, 2 ... count($value)-1



    .

  • [PR] Add support for property initialization during cloning — - . 
    class Foo
{
    public $bar;
    public $baz;

    public function withProperties($bar, $baz)
    {
        $self = clone $this;
        $self->bar = $bar;
        $self->baz = $baz;

        return $self;
    }
}

class Foo
{
    public $bar;
    public $baz;

    public function withProperties($bar, $baz)
    {
        return clone $this with {
            bar: $bar,
            baz: $baz,
        };
    }
}






Symfony





Laravel





Yii

















Entertaining













Today there will be the second PHP Digest stream. All news and links from the issue + more details, an overview of what was sent, interesting but not included in the issue, the results of the drawing and a new contest with elephants.

Beginning at 20:00 Moscow, Minsk / 19:00 Kiev.



Poll: Summing Up PHP Year and Playing the Elephant





If you notice an error or inaccuracy, please let us know in a personal habr or telegram .





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