class BlogData
{
public readonly string $title;
public readonly Status $status;
public function __construct(string $title, Status $status)
{
$this->title = $title;
$this->status = $status;
}
}
readonly class BlogData
{
public string $title;
public Status $status;
public function __construct(string $title, Status $status)
{
$this->title = $title;
$this->status = $status;
}
}
class Foo {
public function bar(mixed $entity) {
if ((($entity instanceof A) && ($entity instanceof B)) || ($entity === null)) {
return $entity;
}
throw new Exception('Invalid entity');
}
}
class Foo {
public function bar((A&B)|null $entity) {
return $entity;
}
}
null
、false
、 和true
作为独立类型 RFC
RFC
¶class Falsy
{
public function almostFalse(): bool { /* ... */ *}
public function almostTrue(): bool { /* ... */ *}
public function almostNull(): string|null { /* ... */ *}
}
class Falsy
{
public function alwaysFalse(): false { /* ... */ *}
public function alwaysTrue(): true { /* ... */ *}
public function alwaysNull(): null { /* ... */ *}
}
use Random\Engine\Xoshiro256StarStar;
use Random\Randomizer;
$blueprintRng = new Xoshiro256StarStar(
hash('sha256', "Example seed that is converted to a 256 Bit string via SHA-256", true)
);
$fibers = [];
for ($i = 0; $i < 8; $i++) {
$fiberRng = clone $blueprintRng;
// Xoshiro256**'s 'jump()' method moves the blueprint ahead 2**128 steps, as if calling
// 'generate()' 2**128 times, giving the Fiber 2**128 unique values without needing to reseed.
$blueprintRng->jump();
$fibers[] = new Fiber(function () use ($fiberRng, $i): void {
$randomizer = new Randomizer($fiberRng);
echo "{$i}: " . $randomizer->getInt(0, 100), PHP_EOL;
});
}
// The randomizer will use a CSPRNG by default.
$randomizer = new Randomizer();
// Even though the fibers execute in a random order, they will print the same value
// each time, because each has its own unique instance of the RNG.
$fibers = $randomizer->shuffleArray($fibers);
foreach ($fibers as $fiber) {
$fiber->start();
}
“随机”扩展为随机数生成提供了新的面向对象的 API。面向对象的 API 不依赖使用 Mersenne Twister 算法的全局种子随机数生成器 (RNG),而是提供多个类(“引擎”),提供对现代算法的访问,这些算法将其状态存储在对象内,以允许多个独立的可种子序列。
该类\Random\Randomizer
提供了一个高级接口来使用引擎的随机性来生成随机整数、对数组或字符串进行洗牌、选择随机数组键等等。
trait Foo
{
public const CONSTANT = 1;
}
class Bar
{
use Foo;
}
var_dump(Bar::CONSTANT); // 1
var_dump(Foo::CONSTANT); // Error
class User
{
public $name;
}
$user = new User();
$user->last_name = 'Doe';
$user = new stdClass();
$user->last_name = 'Doe';
class User
{
public $name;
}
$user = new User();
$user->last_name = 'Doe'; // Deprecated notice
$user = new stdClass();
$user->last_name = 'Doe'; // Still allowed
不推荐创建动态属性,以帮助避免错误和拼写错误,除非类选择使用该#[\AllowDynamicProperties]
属性。stdClass
允许动态属性。
__get
/ magic 方法的使用__set
不受此更改的影响。
mysqli_execute_query
功能和mysqli::execute_query
方法。#[\AllowDynamicProperties]
和#[\SensitiveParameter]
属性。ZipArchive::getStreamIndex
、ZipArchive::getStreamName
、 和ZipArchive::clearError
方法。ReflectionFunction::isAnonymous
方法ReflectionMethod::hasPrototype
。curl_upkeep
、、、、、、功能。memory_reset_peak_usage
_ ini_parse_quantity
_ _libxml_get_external_entity_loader
sodium_crypto_stream_xchacha20_xor_ic
openssl_cipher_key_length
${}
字符串插值。utf8_encode
和utf8_decode
功能。DateTime::createFromImmutable
和DateTimeImmutable::createFromMutable
的暂定返回类型为static
。ODBC
和PDO_ODBC
转义用户名和密码。strtolower
和strtoupper
不再区分区域设置。SplFileObject::getCsvControl
、SplFileObject::fflush
、SplFileObject::ftell
、SplFileObject::fgetc
和SplFileObject::fpassthru
强制执行它们的签名。SplFileObject::hasChildren
暂定返回类型为false
。SplFileObject::getChildren
暂定返回类型为null
。SplFileInfo::_bad_state_ex
已被弃用。