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      從未停止前進(jìn),PHP8.1帶來(lái)了8個(gè)重要的新轉(zhuǎn)變!

      “php是世界上最好的語(yǔ)言”,它從未停止前進(jìn)的步伐!PHP團(tuán)隊(duì)目前已經(jīng)發(fā)布了PHP 8.1.0 RC 5版,而下一個(gè)版本將是第六個(gè)也是最后一個(gè)候選版本 (RC 6),將于近期發(fā)布。下面就給大家介紹一下在PHP8.1中會(huì)有哪8個(gè)重要的新轉(zhuǎn)變,先一睹為快吧!

      1、枚舉(Enums)

      enum Status {     case draft;     case published;     case archived;          public function color(): string     {         return match($this)          {             Status::draft => 'grey',                Status::published => 'green',                Status::archived => 'red',            };     } }

      2、只讀屬性(Readonly properties)

      class PostData {     public function __construct(         public readonly string $title,         public readonly string $author,         public readonly string $body,         public readonly DateTimeImmutable $createdAt,         public readonly PostState $state,     ) {} }

      3、初始化程序中的新內(nèi)容(New in initializers)

      class PostStateMachine {     public function __construct(         private State $state = new Draft(),     ) {     } }

      4、纖維,又名“綠線”(Fibers, a.k.a. "green threads")

      $fiber = new Fiber(function (): void {     $valueAfterResuming = Fiber::suspend('after suspending');          // …  });   $valueAfterSuspending = $fiber->start();   $fiber->resume('after resuming');

      5、數(shù)組解包也支持字符串鍵(Array unpacking also supports string keys)

      $array1 = ["a" => 1]; $array2 = ["b" => 2]; $array = ["a" => 0, ...$array1, ...$array2]; var_dump($array); // ["a" => 1, "b" => 2]

      6、一種可調(diào)用類(First class callables)

      function foo(int $a, int $b) { /* … */ } $foo = foo(...); $foo(a: 1, b: 2);

      7、純交集類型(Pure intersection types)

      function generateSlug(HasTitle&HasId $post) {     return strtolower($post->getTitle()) . $post->getId(); }

      8、新array_is_list功能(The new array_is_list function)

      $list = ["a", "b", "c"]; array_is_list($list); // true $notAList = [1 => "a", 2 => "b", 3 => "c"]; array_is_list($notAList); // false $alsoNotAList = ["a" => "a", "b" => "b", "c" => "c"]; array_is_list($alsoNotAList); // false

      本文系翻譯,原文地址:https://stitcher.io/blog/php-81-in-8-code-blocks

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    4. 從未停止前進(jìn),PHP8.1帶來(lái)了8個(gè)重要的新轉(zhuǎn)變!

      聲明:本文原創(chuàng)發(fā)布php中文網(wǎng),轉(zhuǎn)載請(qǐng)注明出處,感謝您的尊重!如有疑問(wèn),請(qǐng)聯(lián)系admin@php.cn處理

    5. 相關(guān)標(biāo)簽:PHP8.1
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