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PHP-Digest # 194 (December 1 - 14, 2020)

Fresh selection with links to news and materials. In the release: Enum in PHP 8.1, Serializable removal and $ GLOBALS limitation, plus other news from PHP Internals, PhpStorm 2020.3, Symfony UX, a portion of useful tools, a video, and the first PHP Digest Stream.



Enjoy reading!









News and releases



  • habr PhpStorm 2020.3 : PHP 8, Attributes, PHPStan and Psalm, Xdebug 3, Tailwind CSS and Co-development.
  • JetBrains Qodana EAP — JetBrains PhpStorm CI.
  • Slack $27 — , PHP, Hack.
  • WordPress 5.6 — C - PHP 8.
  • PHP – 2020.2 — , Composer packagist.org.

    • PHP 7.4: 42.61% (+22.55)

    • PHP 7.3: 27.05% (-3.00)

    • PHP 7.2: 15.28% (-12.21)

    • PHP 7.1: 7.45% (-4.1)

    • PHP 5.6: 2.71% (-2.28)

    • PHP 7.0: 2.70% (-1.30)



PHP Internals



  • [RFC] Deprecate passing null to non-nullable arguments of internal functions — PHP null



    , nullable



    . , str_contains("", null)







    , , null . 



    str_contains("", null);
// > No errors

function _str_contains ( string $haystack , string $needle ) : bool
{
    return true;
}

_str_contains("", null);
// > Fatal error: Uncaught TypeError: Argument 2 passed to _str_contains() must be of the type string, null given


    8.1 deprecation notice.



    declare(strict_types=1);



    .
  • [RFC] Restrict $GLOBALS usage — , $GLOBALS



    , INDIRECT



    PHP. PHP.



    RFC $GLOBALS



    .



    , , isset unset: 



    $GLOBALS['x'] = 1;

echo $GLOBALS['x']

isset($GLOBALS['x']);
unset($GLOBALS['x']);


    .



    $GLOBALS : 



    $GLOBALS = [];
$GLOBALS =& $x;
$x =& $GLOBALS;
unset($GLOBALS);


    , $GLOBALS



    : 



    asort($GLOBALS);
// > Compile-time error


    : : « PHP».
  • [RFC] Phasing out Serializable — 7.4 : Serialiazable



    __serialize()



    __unserialize()



    .



    Serializable



    . PHP 8.1 deprecation notice, PHP 9.0 — compile-time error.
  • [RFC] Enumerations — Ilija Tovilo Larry Garfield enum RFC, Swift, Rust, Kotlin.



    Enum , — . , , « Enums X» « , ». .



    enum



    case



    : 



    enum Suit {
  case Hearts;
  case Diamonds;
  case Clubs;
  case Spades;
}


    : 



    $val = Suit::Diamonds;

function pick_a_card(Suit $suit) { ... }

pick_a_card($val);        // OK
pick_a_card(Suit::Clubs); // OK
pick_a_card('Spades');    // TypeError


    Enum -: 



    $a = Suit::Spades;
$b = Suit::Spades;

$a === $b; // true

$a instanceof Suit;         // true
$a instanceof Suit::Spades; // true


    Enum. , : 



    enum Suit: string {
  case Hearts = 'H';
  case Diamonds = 'D';
  case Clubs = 'C';
  case Spades = 'S';
}

echo "I hope I draw a " . Suit::Spades;
// prints "I hope I draw a S".


    Enum , . : 



    enum UserStatus: string {
  case Pending = 'pending';
  case Active = 'active';
  case Suspended = 'suspended';
  case CanceledByUser = 'canceled';

  public function label(): string {
    return match($this) {
      UserStatus::Pending => 'Pending',
      UserStatus::Active => 'Active',
      UserStatus::Suspended => 'Suspended',
      UserStatus::CanceledByUser => 'Canceled by user',
    };
  }
}

foreach (UserStatus::cases() as $key => $val) {
  printf('<option value="%s">%s</option>\n', $key, $val->label());
}


    :



    • case?
    • ? function stuff(Suit::Heart|Suit:Diamond $card) { ... }



    • Enum?
    • < enum



      ? , Enum



      . : enum class UserStatus {...}





  • [RFC] Algebraic Data Types — Enum PHP. ** tagged unions pattern matching.
  • [RFC] Direct execution opcode file without php source code file — . , - .pyc / .pyo



    .



    PHP . , <?phpo%php_version_id%



    .



    include()



    , include_once()



    , require()



    , require_once()



    .
  • [RFC] Wall-Clock Time Based Execution Timeout — PHP . sleep() . , ini- max_execution_time



    .



    RFC max_execution_wall_time



    , .






Symfony





Laravel





Yii





Async PHP









/





Entertaining











Today I will stream the PHP digest for the first time. All news and links from the issue + more details, an overview of what was sent, interesting but not included in the issue, and a contest with elephants.

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





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





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