<\/span><\/h2>\n\n\n\n PHP 8.0\u3067\u306f\u5408\u4f75\u578b(Union)\u304c\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\uff0ePHP 8.1\u3067\u306f\u4ea4\u5dee\u578b(Intersection)\u304c\u5c0e\u5165\u3055\u308c\u307e\u3059\uff0eUnion\u3067\u306f\uff0c\u95a2\u6570\u30fb\u30e1\u30bd\u30c3\u30c9\u306e\u5f15\u6570\u307e\u305f\u306f\u623b\u308a\u5024\u306b\u8907\u6570\u306e\u578b\u306e\u5019\u88dc\u3092\u6307\u5b9a\u3067\u304d\u307e\u3059\uff0e\u8907\u6570\u306e\u578b\u306f\u8ad6\u7406\u548c\u3068\u540c\u69d8\u306b\u2019|\u2019\u3067\u631f\u3093\u3067\u6307\u5b9a\u3057\u307e\u3059\uff0e\u4e00\u65b9\uff0cIntersection\u306f\u8ad6\u7406\u7a4d\u306b\u76f8\u5f53\u3057\uff0c\u8907\u6570\u306e\u578b\u306b\u5171\u901a\u3059\u308b\u8981\u7d20\u3092\u2019&\u2019\u3067\u631f\u3093\u3067\u6307\u5b9a\u3057\u307e\u3059\uff0e\u7c21\u5358\u306a\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\uff0e<\/p>\n\n\n\n
--<\/p>\n\n\n\n
<?php<\/p>\n\n\n\n
class Test {<\/p>\n\n\n\n
private Traversable&Countable $ci;<\/p>\n\n\n\n
public function setIterator(Traversable&Countable $c) {<\/p>\n\n\n\n
$this->ci = c;<\/p>\n\n\n\n
}<\/p>\n\n\n\n
public function getIterator(): Traversable&Countable {<\/p>\n\n\n\n
return $this->ci;<\/p>\n\n\n\n
}<\/p>\n\n\n\n
}<\/p>\n\n\n\n
--<\/p>\n\n\n\n
\u3053\u306e\u4f8b\u3067\u306f\uff0cTest\u30af\u30e9\u30b9\u306esetIterator\u30e1\u30bd\u30c3\u30c9\u306e\u5f15\u6570\u306e\u578b\uff0cgetIterator\u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\u304a\u3088\u3073\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u5909\u6570$ci\u306e\u578b\u3068\u3057\u3066\uff0cTraversable & Countable \u3092\u6307\u5b9a\u3057\u3066\u3044\u307e\u3059\uff0e\u3053\u308c\u306f\uff0cTraversable\u304b\u3064Countable\u3067\u3042\u308b\u3053\u3068\u3092\u6307\u5b9a\u3057\u3066\u304a\u308a\uff0c\u3069\u3061\u3089\u304b\u7247\u65b9\u306e\u30af\u30e9\u30b9\u578b\uff08\u307e\u305f\u306f\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\uff09\u306e\u307f\u6709\u3059\u308b\u5834\u5408\u306f\u30a8\u30e9\u30fc\u3068\u306a\u308a\u307e\u3059\uff0e\u8907\u6570\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3092\u6307\u5b9a\u3059\u308b\u30b1\u30fc\u30b9\u306a\u3069\u3067\u306e\u5229\u7528\u304c\u60f3\u5b9a\u3055\u308c\u307e\u3059\uff0e<\/p>\n\n\n\n
never\u578b<\/h4>\n\n\n\n
PHP 8.1\u3067\u306f\uff0c\u95a2\u6570\u304b\u3089\u51e6\u7406\u3092\u623b\u3055\u306a\u3044\u3053\u3068\u3092\u660e\u793a\u7684\u306b\u6307\u5b9a\u3059\u308b\u623b\u308a\u5024\u578b\u3068\u3057\u3066 never \u304c\u5c0e\u5165\u3055\u308c\u307e\u3059\uff0e\u3053\u308c\u306f\uff0c\u4f8b\u3048\u3070\uff0cHTTP\u30d8\u30c3\u30c0\u306e\u51fa\u529b\u3067\u30ea\u30c0\u30a4\u30ec\u30af\u30c8\u6307\u5b9a\u3092\u884c\u3063\u305f\u5f8c\uff0cPHP\u30b9\u30af\u30ea\u30d7\u30c8\u306e\u51e6\u7406\u3092\u7d42\u4e86\u3059\u308b\u30b1\u30fc\u30b9\u304c\u60f3\u5b9a\u3055\u308c\u307e\u3059\uff0e\u4ee5\u4e0b\u306b\u30ea\u30c0\u30a4\u30ec\u30af\u30c8\u51e6\u7406\u3092\u884c\u3046\u95a2\u6570\u306e\u4f8b\u3092\u793a\u3057\u307e\u3059\uff0e<\/p>\n\n\n\n
--<\/p>\n\n\n\n
<?php<\/p>\n\n\n\n
function redirect(string $uri): never {<\/p>\n\n\n\n
\u3000header('Location:'.$uri);<\/p>\n\n\n\n
exit();<\/p>\n\n\n\n
}<\/p>\n\n\n\n
--<\/p>\n\n\n\n
\u623b\u308a\u5024\u578b\u3068\u3057\u3066\u201dnever\u201d\u3092\u6307\u5b9a\u3057\uff0c\u3053\u306e\u95a2\u6570\u304b\u3089\u51e6\u7406\u304c\u623b\u3089\u306a\u3044\u3053\u3068\u3092\u660e\u793a\u7684\u306b\u6307\u5b9a\u3057\u3066\u3044\u307e\u3059\uff0e\u5f8c\u65e5\uff0c\u4f8b\u3048\u3070\uff0c\uff13\u884c\u76ee\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u3092\u8ffd\u52a0\u3057\u3066\u3057\u307e\u3063\u305f\u3068\u3057\u307e\u3057\u3087\u3046\uff0e<\/p>\n\n\n\n
--<\/p>\n\n\n\n
<?php<\/p>\n\n\n\n
function redirect(string $uri): never {<\/p>\n\n\n\n
if ($uri==='') {return;}<\/p>\n\n\n\n
header('Location:'.$uri);<\/p>\n\n\n\n
exit();<\/p>\n\n\n\n
}<\/p>\n\n\n\n
\u2013-<\/p>\n\n\n\n
\u3053\u306e\u5834\u5408\uff0cnever\u306e\u6307\u5b9a\u306b\u3088\u308a\u51e6\u7406\u304c\u623b\u308b\u3053\u3068\u304c\u7981\u6b62\u3055\u308c\u3066\u3044\u308b\u305f\u3081\uff0c3\u884c\u76ee\u3067return\u3092\u5b9f\u884c\u3059\u308b\u30b3\u30fc\u30c9\u306f\u30a8\u30e9\u30fc\u3092\u767a\u751f\u3057\u307e\u3059\uff0e\u3053\u306e\u3088\u3046\u306bnever\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3067\uff0c\u51e6\u7406\u304c\u623b\u3089\u306a\u3044\u95a2\u6570\u306e\u51e6\u7406\u3092\u660e\u793a\u7684\u306b\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\uff0e<\/p>\n\n\n\n
<\/h4>\n\n\n\nreadonly\u578b<\/h4>\n\n\n\n
\u3000PHP 8.1\u3067\u306freadonly\u6307\u5b9a\u5b50\u3092\u4ed8\u4e0e\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u521d\u671f\u5316\u5f8c\u306b\u5909\u66f4\u304c\u3067\u304d\u306a\u3044\u5909\u6570\u3092\u4f5c\u6210\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\uff0e\u3053\u306e\u52d5\u4f5c\u306f\uff0c\u5b9a\u6570\u306b\u4f3c\u3066\u3044\u307e\u3059\u304c\uff0c\u521d\u671f\u5316\u3055\u308c\u308b\u5024\u304c\u56fa\u5b9a\u5024\u3067\u306a\u304f\u3066\u826f\u3044\u3068\u3044\u3046\u7279\u5fb4\u304c\u3042\u308a\u307e\u3059\uff0e\u4ee5\u4e0b\u306e\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\uff0e<\/p>\n\n\n\n
--<\/p>\n\n\n\n
<?php<\/p>\n\n\n\n
class Test {<\/p>\n\n\n\n
public readonly string $prop;<\/p>\n\n\n\n
public function __construct(string $v){<\/p>\n\n\n\n
$this->prop=$v; <\/p>\n\n\n\n
}<\/p>\n\n\n\n
}<\/p>\n\n\n\n
\u2013<\/p>\n\n\n\n
\u3053\u306e\u4f8b\u3067\u306f\uff0c\u30d7\u30ed\u30d1\u30c6\u30a3\u5909\u6570$prop\u306breadonly\u304c\u6307\u5b9a\u3055\u308c\u3066\u3044\u307e\u3059\uff0e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3067\u3053\u306e\u5909\u6570\u306b\u521d\u671f\u5024\u304c\u4ee3\u5165\u3055\u308c\u3066\u3044\u307e\u3059\uff0e\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u201dfoo\u201d\u3092\u6307\u5b9a\u3057\u3066\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u306b\u3088\u308a\uff0creadonly\u3092\u6307\u5b9a\u3057\u305f\u30d7\u30ed\u30d1\u30c6\u30a3\u5909\u6570$prop\u306b\u305d\u306e\u5024\u304c\u4ee3\u5165\u3055\u308c\u307e\u3059\uff0e\u3057\u304b\u3057\uff0c\uff13\u884c\u76ee\u3067\u30d7\u30ed\u30d1\u30c6\u30a3\u5909\u6570\u306b\u5024\u3092\u4ee3\u5165\u3057\u3088\u3046\u3068\u3059\u308b\u3068\uff0c\u521d\u671f\u5316\u6642\u3067\u306f\u306a\u3044\u305f\u3081\uff0c\u30a8\u30e9\u30fc\u3092\u767a\u751f\u3057\u307e\u3059\uff0e<\/p>\n\n\n\n
--<\/p>\n\n\n\n
$obj = new Test(\u201cfoo\u201d);<\/p>\n\n\n\n
var_dump($obj->prop); \/\/ \u201cfoo\u201d<\/p>\n\n\n\n
$obj->prop=\u201dboo\u201d; \/\/ \u30a8\u30e9\u30fc\u767a\u751f<\/p>\n\n\n\n
\u2013<\/p>\n\n\n\n
\u2018...\u2019\u306b\u3088\u308b\u914d\u5217\u5c55\u958b<\/h4>\n\n\n\n
PHP 8.1\u3067\u306f\u2019...\u2019\u306b\u3088\u308a\u9023\u60f3\u914d\u5217\u306b\u304a\u3051\u308b\u914d\u5217\u5c55\u958b\u304c\u53ef\u80fd\u3068\u306a\u308a\u307e\u3057\u305f\uff0e\u3053\u306e\u2019...\u2019\u3068\u3044\u3046\u30ad\u30fc\u30ef\u30fc\u30c9\u306f\u3044\u304f\u3064\u304b\u306e\u4f7f\u7528\u6cd5\u304c\u65e2\u306b\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u307e\u3059\u306e\u3067\uff0c\u9806\u756a\u306b\u8aac\u660e\u3057\u307e\u3059\uff0e<\/p>\n\n\n\n
\u3000\u307e\u305a\uff0cPHP 5.6\u306b\u304a\u3044\u3066\u95a2\u6570\uff08\u30e1\u30bd\u30c3\u30c9\uff09\u306e\u5f15\u6570\u306b\u304a\u3044\u3066\u914d\u5217\u306e\u3088\u305d\u3092\u5c55\u958b\u3059\u308b\u6f14\u7b97\u5b50\u3068\u3057\u3066\u2019...\u2019\u304c\u5c0e\u5165\u3055\u308c\u3066\u3044\u307e\u3059\uff0e\u4ee5\u4e0b\u306e\u4f8b\u306b\u304a\u3044\u3066\uff0ctest\u95a2\u6570\u306e\u5f15\u6570\u3068\u3057\u3066\u8907\u6570\u306e\u914d\u5217\uff08$a, $b\uff09\u3092\u6307\u5b9a\u3057\u3066\u3044\u307e\u3059\uff0e\u2019...\u2019\u3092\u914d\u5217\u5909\u6570\u306e\u524d\u306b\u4ed8\u4e0e\u3059\u308b\u3053\u3068\u306b\u3088\u308a\uff0c\u5f53\u8a72\u914d\u5217\u306e\u8981\u7d20\u304c\u5c55\u958b\u3055\u308c\u307e\u3059\uff0e\u3053\u306e\u4f8b\u3067\u306f\uff0ctest(1,2,3) \u306e\u3088\u3046\u306b\u6307\u5b9a\u3055\u308c\u307e\u3059\uff0e<\/p>\n\n\n\n
--<\/p>\n\n\n\n
function test({ var_dump(func_get_args());}<\/p>\n\n\n\n
$a=[1,2];<\/p>\n\n\n\n
$b=[3];<\/p>\n\n\n\n
test(...$a,...$b); \/\/ [1,2,3]<\/p>\n\n\n\n
--<\/p>\n\n\n\n
\u3000\u6b21\u306b PHP 7.4 \u306b\u304a\u3044\u3066\u6dfb\u5b57\u914d\u5217\u306b\u304a\u3051\u308b\u914d\u5217\u306e\u5c55\u958b\u306b\u3082\u3053\u306e\u2019...\u2019\u304c\u5229\u7528\u53ef\u80fd\u3068\u306a\u308a\u307e\u3057\u305f\uff0e\u4ee5\u4e0b\u306e\u4f8b\u3067\u306f\uff0c\u914d\u5217\u5909\u6570$a, $b \u3092\u5225\u306e\u914d\u5217\u5909\u6570\u306b\u4ee3\u5165\u3059\u308b\u969b\u306b\u2019\u2026\u2019 \u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3067\uff0c\u914d\u5217\u306e\u8981\u7d20\u3092\u5c55\u958b\u3057\u3066\u3044\u307e\u3059\uff0e<\/p>\n\n\n\n
--<\/p>\n\n\n\n
$a=[1,2];<\/p>\n\n\n\n
$b=[3];<\/p>\n\n\n\n
$c=[0,...$a,...$b];<\/p>\n\n\n\n
var_dump($c); \/\/ [0,1,2,3]<\/p>\n\n\n\n
--<\/p>\n\n\n\n
\u3000PHP 8.1\u3067\u306f\uff0c\u6dfb\u5b57\u914d\u5217\u306b\u52a0\u3048\u3066\uff0c\u9023\u60f3\u914d\u5217\u306b\u304a\u3044\u3066\u3082\u2019\u2026\u2019\u3092\u6307\u5b9a\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\uff0e\u4ee5\u4e0b\u306e\u4f8b\u3067\u306f\uff0c\u9023\u60f3\u914d\u5217$a,$b\u3092\u9023\u60f3\u914d\u5217$c\u306b\u4ee3\u5165\u3057\u3066\u3044\u307e\u3059\uff0e<\/p>\n\n\n\n
\u2013<\/p>\n\n\n\n
$a=[\"a\"=>1];<\/p>\n\n\n\n
$b=[\"b\"=>2];<\/p>\n\n\n\n
$c=[\"a\"=>0,...$a,...$b];<\/p>\n\n\n\n
var_dump($c); \/\/ \u201ca\u201d=>1, \u201cb\u201d=>2<\/p>\n\n\n\n
\u2013<\/p>\n\n\n\n
\u9023\u60f3\u914d\u5217$c\u306b\u6307\u5b9a\u3055\u308c\u308b\u5024\u306f\uff0c[\u201ca\u201d=>0,\u201da\u201d=>1,\u201db\u201d=>2] \u3068\u306a\u308a\u307e\u3059\uff0e\u306a\u304a\uff0c\u9023\u60f3\u914d\u5217\u306e\u30ad\u30fc\u304c\u91cd\u306a\u308b\u5834\u5408\uff0c\u6700\u5f8c\uff08\u3088\u308a\u53f3\u5074\uff09\u306b\u6307\u5b9a\u3055\u308c\u305f\u8981\u7d20\u306e\u5024\u304c\u63a1\u7528\u3055\u308c\u307e\u3059\uff0e\u3053\u306e\u4f8b\u3067\u306f\uff0c\u201da\u201d\u3092\u30ad\u30fc\u3068\u3059\u308b\u5024\u306b\u3064\u3044\u3066\uff0c0\u30681\u304c\u6307\u5b9a\u3055\u308c\u3066\u3044\u307e\u3059\u304c\uff0c\u5f8c\u3067\u6307\u5b9a\u3055\u308c\u305f1\u304c\u63a1\u7528\u3055\u308c\u3066\u3044\u307e\u3059\uff0e<\/p>\n\n\n\n
\u2018...\u2019\u69cb\u6587\u306b\u3088\u308b\u30af\u30ed\u30fc\u30b8\u30e3<\/h4>\n\n\n\n
\u3000PHP 7.1\u3067\u306f\uff0c\u30b3\u30fc\u30eb\u53ef\u80fd(callable)\u306a\u95a2\u6570\uff08\u30e1\u30bd\u30c3\u30c9\uff09\u3092\u7528\u3044\u3066\u30af\u30ed\u30fc\u30b8\u30e3\u3092\u5b9a\u7fa9\u3059\u308b\u4ed5\u7d44\u307f\u304c\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u307e\u3059\uff0efromCallable \u3068\u3044\u3046\u30b9\u30bf\u30c6\u30a3\u30c3\u30af\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u3067\uff0c\u30af\u30ed\u30fc\u30b8\u30e3\u3092\u5b9a\u7fa9\u3067\u304d\u307e\u3059\uff0e<\/p>\n\n\n\n
public static Closure::fromCallable(callable $callback) : Closure<\/p>\n\n\n\n
\u3000\u4f8b\u3048\u3070\uff0c\u7d44\u8fbc\u307f\u95a2\u6570strlen\u3092\u7528\u3044\u3066\u30af\u30ed\u30fc\u30b8\u30e3\u3092\u5b9a\u7fa9\u3059\u308b\u3068\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\uff0e<\/p>\n\n\n\n
--<\/p>\n\n\n\n
$fn = Closure::fromCallable('strlen');<\/p>\n\n\n\n
\u2013<\/p>\n\n\n\n
\u3000PHP 8.1\u3067\u306f\u66f4\u306b\u4fbf\u5229\u306b\u306a\u308a\uff0c\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u2019\u2026\u2019 \u3092\u5f15\u6570\u306b\u6307\u5b9a\u3059\u308b\u3060\u3051\u3067\u30af\u30ed\u30fc\u30b8\u30e3\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff0e<\/p>\n\n\n\n
\u2013<\/p>\n\n\n\n
$fn = strlen(...);<\/p>\n\n\n\n
\u2013<\/p>\n\n\n\n
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