\u3000\u731b\u6691\u304c\u7d9a\u3044\u305f\u590f\u3082\u7d42\u308f\u308a\uff0c\u3059\u3063\u304b\u308a\u79cb\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u6b21\u306e\u30de\u30a4\u30ca\u30fc\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u3042\u308bPHP 8.2\u306e\u958b\u767a\u3082\u9806\u8abf\u306b\u9032\u3093\u3067\u3044\u307e\u3059\uff0e\u672c\u7a3f\u3067\u306f\uff0c\u524d\u56de\u306b\u7d9a\u3044\u3066PHP 8.2\u306b\u304a\u3051\u308b\u6b8b\u308a\u306e\u5909\u66f4\u70b9\u306b\u3064\u3044\u3066\u7d39\u4ecb\u3057\u307e\u3059\uff0e<\/p>\n\n\n\n
\u3000\u4eca\u5e74\u306e11\u670824\u65e5\u306b\u8a08\u753b\u3055\u308c\u3066\u3044\u308b\u6b63\u5f0f\u30ea\u30ea\u30fc\u30b9\u306b\u5411\u3051\u3066\uff0cPHP 8.2\u306e\u958b\u767a\u304c\u8a08\u753b\u901a\u308a\uff0c\u9806\u8abf\u306b\u9032\u3093\u3067\u3044\u307e\u3059\uff0e 8\u670818\u65e5\u306b\uff13\u56de\u76ee\u306e\u03b2\u30ea\u30ea\u30fc\u30b9\u304c\u884c\u308f\u308c\uff0c\u3059\u3067\u306b8\u6708\u307e\u3067\u306b\u51683\u56de\u306e\u03b2\u30ea\u30ea\u30fc\u30b9\u304c\u884c\u308f\u308c\u3066\u3044\u307e\u3059\uff0e\uff19\u6708\u4ee5\u964d\u306f\u30ea\u30ea\u30fc\u30b9\u5019\u88dc\u7248\u304c\uff12\u9031\u9593\u306b\uff11\u56de\u306e\u30da\u30fc\u30b9\u3067\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u308b\u4e88\u5b9a\u3067\u3042\u308a\uff0c\uff19\u67081\u65e5\u306b\u30ea\u30ea\u30fc\u30b9\u5019\u88dc1\u7248\uff08RC 1\uff09\u304c\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u307e\u3059\uff0e\u3053\u306e\u5f8c\uff0c\u8a08\u753b\u901a\u308a\u3067\u3042\u308c\u307011\u670824\u65e5\u306b\u30ea\u30ea\u30fc\u30b9\u3092\u8fce\u3048\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\uff0e\u8aad\u8005\u306e\u7686\u69d8\u3082\u03b2\u7248\uff0c\u30ea\u30ea\u30fc\u30b9\u5019\u88dc\u7248\u3092\u30c6\u30b9\u30c8\u3057\u3066\u3044\u305f\u3060\u304d\uff0c\u5b89\u5b9a\u3057\u305f\u6b63\u5f0f\u7248\u306e\u30ea\u30ea\u30fc\u30b9\u306b\u5411\u3051\u3066\u3054\u652f\u63f4\u3044\u305f\u3060\u3051\u308c\u3070\u3068\u601d\u3044\u307e\u3059\uff0e<\/p>\n\n\n\n
PHP 8.2\u3067\u306f\uff0c\u8ad6\u7406\u5f0f\u306e\u6a19\u6e96\u7684\u624b\u6cd5\u3067\u3042\u308bDisjunctive Normal Form (DNF)\u306b\u3088\u308b\u578b\u5ba3\u8a00\u304c\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u307e\u3059\uff0eDNF\u306f\uff0c\uff08\u8907\u6570\u307e\u305f\u306f\u4e00\u3064\u306e\uff09AND\u5f0f\u3092OR\u5f0f\u3067\u7d50\u5408\u3059\u308b\u69cb\u9020\u3067\u3042\u308a\uff0c\u5f93\u6765\u306ePHP \u3067\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u308b \u5408\u4f75\u578b\uff08Union\uff09\u3068\u4ea4\u5dee\u578b\uff08Intersection\uff09\u3092\u7d50\u5408\u3059\u308b\u3088\u3046\u306a\u578b\u5ba3\u8a00\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\uff0e<\/p>\n\n\n\n
\u3067\u306f\uff0c\u65e9\u901f\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\uff0e\u4ee5\u4e0b\u306e\u4f8b\u3067\u306f\uff0c\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9A\uff5eD\u3092\u5b9a\u7fa9\u3057\u3066\u3044\u307e\u3059\uff0e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9D\u306e\u623b\u308a\u5024\u306e\u578b\u306f\uff0cPHP 8.2\u3067\u5c0e\u5165\u3055\u308c\u308bDNF\u5f62\u5f0f\u3092\u7528\u3044\u3066 (A&B)|C\uff0c\u3064\u307e\u308a\uff0c\uff08A\u3068B\u306eAND\uff09\u3068C\u306eOR \u3068\u3057\u3066\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u307e\u3059\uff0e\u3053\u3053\u3067\uff0cA&B\u306f\u4e38\u30ab\u30c3\u30b3\u3067\u62ec\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\uff0e\u9006\u306bA&B\u3057\u304b\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\u306f\uff0c\u4e38\u62ec\u5f27\u3067\u62ec\u308b\u3068\u30a8\u30e9\u30fc\u306b\u306a\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\uff0e\u307e\u305f\uff0c(A|C)&(B|C)\u306e\u3088\u3046\u306bOR\u5f0f\u3092AND\u3067\u62ec\u308b\u3053\u3068\u306fDNF\u306e\u539f\u5247\u306b\u53cd\u3059\u308b\u305f\u3081\uff0c\u8a31\u53ef\u3055\u308c\u3066\u3044\u307e\u305b\u3093\uff0e<\/p>\n\n\n\n
interface A {}
interface B {}
interface C {}
interface D {
\u00a0 \u00a0 public function show(): (A&B)|C;
}<\/code><\/pre>\n\n\n\n\u3000\u5f15\u6570\u3067\u3082\u540c\u69d8\u306bDNF\u5f62\u5f0f\u3067\u578b\u3092 (A&B)|C \u306e\u3088\u3046\u306b\u6307\u5b9a\u3067\u304d\u307e\u3059\uff0e<\/p>\n\n\n\n
interface D {
\u00a0 \u00a0 public function show((A&B)|C $a): void;
}<\/code><\/pre>\n\n\n\n\u3000\u30af\u30e9\u30b9\u7d99\u627f\u306b\u304a\u3044\u3066\u306f\uff0c\u4ee5\u524d\u8aac\u660e\u3057\u305f\u300c\u5171\u5909\u6027\u3068\u53cd\u5909\u6027\u300d\u306e\u539f\u5247\u304c\u9069\u7528\u3055\u308c\u307e\u3059\uff0e\u623b\u308a\u5024\u306b\u306f\u5171\u5909\u6027\u304c\u9069\u7528\u3055\u308c\u307e\u3059\uff0e\u4ee5\u4e0b\uff0c\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9D\u3092\u5b9f\u88c5\u3059\u308b\u30af\u30e9\u30b9Moo\u306e\u5b9a\u7fa9\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\uff0e<\/p>\n\n\n\n
interface D {
\u00a0 \u00a0 public function show(): (A&B)|C;
}
class Moo implements D {
\u00a0 \u00a0 public function show(): A&B {}
}<\/code><\/pre>\n\n\n\n\u3000\u3053\u3053\u3067\uff0cMoo\u306eshow()\u30e1\u30bd\u30c3\u30c9\u306e\u578b\u306f\uff0c\u6a19\u6e96\u3067(A&B)|C\u3068\u306a\u308a\u307e\u3059\u304c\uff0cA&B\u306e\u3088\u3046\u306b\u96c6\u5408\u3092\u540c\u3058\uff0c\u307e\u305f\u306f\uff0c\u7e2e\u5c0f\u3055\u305b\u308b\u578b\u5ba3\u8a00\u306e\u307f\u304c\u53ef\u80fd\u3067\u3059\uff0e\u9006\u306b (A&B)|C|E\u306e\u3088\u3046\u306b\u65b0\u305f\u306a\u96c6\u5408\uff08\u4f8b\uff1aE\uff09\u3092\u8ffd\u52a0\u3059\u308b\u3053\u3068\u306f\u8a31\u3055\u308c\u307e\u305b\u3093\uff0e<\/p>\n\n\n\n
\u3000\u5f15\u6570\u306b\u3064\u3044\u3066\u306f\uff0c\u53cd\u5909\u6027\uff0c\u3064\u307e\u308a\uff0c\u540c\u7b49\u3082\u3057\u304f\u306f\u96c6\u5408\u3092\u5e83\u304f\u3059\u308b\u65b9\u5411\u306e\u307f\u304c\u53ef\u80fd\u3067\u3059\uff0e\u4ee5\u4e0b\u306e\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\uff0e<\/p>\n\n\n\n
interface D {
\u00a0 \u00a0 public function show((A&B)|C $a): void;
}
class Moo implements D {
\u00a0 \u00a0 public function show(A|C $a): void {}
}<\/code><\/pre>\n\n\n\n\u3000\u3053\u306e\u4f8b\u3067\u306f\uff0c\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9D\u3092\u5b9f\u88c5\u3059\u308b\u30af\u30e9\u30b9Moo\u306b\u304a\u3044\u3066\uff0c\u30e1\u30bd\u30c3\u30c9show\u306e\u5f15\u6570\u3092A|C\u3068\u5ba3\u8a00\u3057\u3066\u3044\u307e\u3059\uff0e\u3053\u306e\u5ba3\u8a00\u306f\uff0c(A&B)|C\u3088\u308a\u3082\u5236\u7d04\u304c\u7de9\u304f\u306a\u3063\u3066\u304a\u308a\uff0c\u53cd\u5909\u6027\u306e\u539f\u5247\u3092\u6e80\u305f\u3057\u3066\u3044\u307e\u3059\uff0e\u9006\u306b\uff0c(A&B)|(C&E)\u306e\u3088\u3046\u306a\u5236\u7d04\u3092\u53b3\u3057\u304f\u3059\u308b\u578b\u5ba3\u8a00\u3092\u884c\u3046\u3068\u30a8\u30e9\u30fc\u3068\u306a\u308a\u307e\u3059\uff0e<\/p>\n\n\n\n
\u3000\u5408\u4f75\u578b\uff08Union\uff09\u3068\u4ea4\u5dee\u578b\uff08Intersection\uff09\u3092\u7d50\u5408\u3059\u308b\u3088\u3046\u306a\u8907\u5408\u578b\u5ba3\u8a00\u306f\uff0cDNF\u5f62\u5f0f\u306e\u307f\u53ef\u80fd\u3068\u306a\u308a\u307e\u3059\uff0e\u4e00\u822c\u7684\u306a\u8907\u5408\u578b\u5ba3\u8a00\u3082DNF\u5f62\u5f0f\u306b\u7f6e\u304d\u63db\u3048\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u306e\u3067\uff0c\u578b\u5ba3\u8a00\u306e\u81ea\u7531\u5ea6\u304c\u9ad8\u304f\u306a\u308b\u3053\u3068\u304c\u671f\u5f85\u3067\u304d\u307e\u3059\uff0e<\/p>\n\n\n\n
\u30d0\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u306b\u304a\u3051\u308b\u30bb\u30f3\u30b7\u30c6\u30a3\u30d6\u306a\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u51fa\u529b\u6291\u5236<\/h4>\n\n\n\n
\u3000PHP\u3067\u306f\uff0c\u30cf\u30f3\u30c9\u30eb\u3055\u308c\u306a\u3044\u4f8b\u5916\u3084\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u969b\u306b\u6a19\u6e96\u3067\u306f\u30b9\u30bf\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u304c\u8868\u793a\u307e\u305f\u306f\u30ed\u30b0\u306b\u8a18\u9332\u3055\u308c\u307e\u3059\uff0e\u3057\u304b\u3057\uff0c\u3053\u306e\u4e2d\u306b\u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u3088\u3046\u306a\u30bb\u30f3\u30b7\u30c6\u30a3\u30d6\u306a\u60c5\u5831\u304c\u542b\u307e\u308c\u3066\u3057\u307e\u3046\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\uff0e\u4f8b\u3048\u3070\uff0c\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u51e6\u7406\u3092\u884c\u3046PDO\u30a8\u30af\u30b9\u30c6\u30f3\u30b7\u30e7\u30f3\u3067\u306f\uff0c\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068\u306e\u63a5\u7d9a\u8a8d\u8a3c\u7528\u306e\u30c7\u30fc\u30bf\uff08\u30e6\u30fc\u30b6\u540d\u3084\u30d1\u30b9\u30ef\u30fc\u30c9\uff09\u3092\u5f15\u6570\u306b\u5165\u529b\u3057\u307e\u3059\u304c\uff0c\u305d\u306e\u51e6\u7406\u3067\u30a8\u30e9\u30fc\u3084\u4f8b\u5916\u3092\u767a\u751f\u3059\u308b\u3068\uff0c\u30b9\u30bf\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u8868\u793a\u306b\u305d\u306e\u60c5\u5831\u304c\u542b\u307e\u308c\u3066\u3057\u307e\u3046\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\uff0e\u4ee5\u4e0b\u306e\u7c21\u5358\u306a\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\uff0e<\/p>\n\n\n\n
<?php
function db_connect($user, $password) {
\u00a0 \u00a0 throw new \\Exception('Error');
}
db_connect('taro', 'secret');<\/code><\/pre>\n\n\n\n\u3000\u3053\u306e\u4f8b\u3067\u306f\uff0c\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u3092\u6a21\u64ec\u3057\u305f\u95a2\u6570db_connect\u3067\u4f8b\u5916\u3092\u767a\u751f\u3055\u305b\u3066\u3044\u307e\u3059\uff0e\u3053\u306e\u4f8b\u306e\u51fa\u529b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\uff0e<\/p>\n\n\n\n
Fatal error: Uncaught Exception: Error in ..\/test.php:3
Stack trace:
#0 ..\/test.php(6): db_connect('taro',\u2019secret\u2019)
#1 {main}
\u00a0 thrown in test.php on line 3<\/code><\/pre>\n\n\n\n\u3000\u30d1\u30b9\u30ef\u30fc\u30c9\uff08\u7b2c\u4e8c\u5f15\u6570\uff09\u304c\u30b9\u30bf\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u306b\u542b\u307e\u308c\u3066\u3044\u307e\u3059\uff0e\u3053\u306e\u8868\u793a\u304c\u753b\u9762\u51fa\u529b\u3055\u308c\uff0c\u3082\u3057\u304f\u306f\uff0c\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306b\u4fdd\u5b58\u3055\u308c\u305f\u5834\u5408\uff0c\u610f\u56f3\u305b\u305a\u306b\u30d1\u30b9\u30ef\u30fc\u30c9\u304c\u6f0f\u308c\u3066\u3057\u307e\u3046\u30ea\u30b9\u30af\u304c\u751f\u3058\u307e\u3059\uff0e\u306a\u304a\uff0c\u5b9f\u904b\u7528\u30b7\u30b9\u30c6\u30e0\u3067\u306f\uff0c\u3053\u3046\u3057\u305f\u30ea\u30b9\u30af\u3092\u4e0b\u3052\u308b\u305f\u3081\u306b\uff0c\u4f8b\u5916\u30fb\u30a8\u30e9\u30fc\u51e6\u7406\u3092Web\u30d6\u30e9\u30a6\u30b6\u306b\u51fa\u529b\u3059\u308b\u8a2d\u5b9a\u306f\u63a8\u5968\u3055\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\uff0e<\/p>\n\n\n\n
\u3000PHP 8.2\u3067\u306f\uff0c\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u30bb\u30f3\u30b7\u30c6\u30a3\u30d6\u306a\u5f15\u6570\uff08\u3053\u3053\u3067\u306f$password\uff09\u306e\u524d\u306b\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3 #[\\SensitiveParameter]\u3000\u3092\u4ed8\u4e0e\u3059\u308b\u3053\u3068\u3067\uff0c\u5bfe\u5fdc\u3059\u308b\u5f15\u6570\u306e\u5185\u5bb9\u306e\u51fa\u529b\u3092\u6291\u5236\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff0e<\/p>\n\n\n\n
<?php
function db_connect($user, #[\\SensitiveParameter] $password) {
\u00a0 \u00a0 throw new \\Exception('Error');
}
db_connect('taro', 'secret');<\/code><\/pre>\n\n\n\n\u51fa\u529b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\uff0c\u5f53\u8a72\u5909\u6570\u306e\u5024\u304cObject(SensitiveParameterValue) \u3068\u8868\u793a\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\uff0e<\/p>\n\n\n\n
Fatal error: Uncaught Exception: Error in ..\/test.php:3
Stack trace:
#0 ..\/test.php(6): db_connect('taro', Object(SensitiveParameterValue))
#1 {main}
\u00a0 thrown in\u3000test.php on line 3<\/code><\/pre>\n\n\n\n\u3000\u3053\u306e\u72b6\u614b\u3067\uff0cWeb\u30d6\u30e9\u30a6\u30b6\u3078\u306e\u51fa\u529b\u3084\u30ed\u30b0\u3078\u306e\u8a18\u9332\u304c\u884c\u308f\u308c\u305f\u5834\u5408\u3067\u3082\uff0c\u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u3088\u3046\u306a\u6a5f\u5bc6\u60c5\u5831\u306e\u6f0f\u6d29\u3092\u56de\u907f\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff0e<\/p>\n\n\n\n
\u5b9a\u6570\u5f0f\u306b\u304a\u3051\u308b\u5217\u6319\u578b\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u30b5\u30dd\u30fc\u30c8<\/h4>\n\n\n\n
\u3053\u306e\u63d0\u6848\u306f\uff0c\u5b9a\u6570\u5f0f\u306b\u304a\u3044\u3066\u5217\u6319\u578b\uff08enum\uff09\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u53d6\u5f97\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u3082\u306e\u3067\u3059\uff0e\u3053\u306e\u63d0\u6848\u306f\uff0c\u958b\u767a\u8005\u306e\u6295\u7968\u306b\u304a\u3044\u306624\u5bfe11\u3068\u6bd4\u8f03\u7684\u50c5\u5dee\u3067\u63a1\u7528\u3055\u308c\u3066\u3044\u307e\u3059\uff0e\u65e9\u901f\uff0c\u5177\u4f53\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\uff0e<\/p>\n\n\n\n
<?php
enum A: string {
\u00a0 \u00a0 case B = 'B_';
\u00a0 \u00a0 const C = [self::B->value => self::B]; \/\/ A::C['B_'][name->'B',value->'B_']
}<\/code><\/pre>\n\n\n\n\u3000\u3053\u3053\u3067\u306f\uff0c\u5217\u6319\u578b\uff08enum\uff09\u306e\u5185\u90e8\u306e\u5b9a\u6570\u5f0f\u3067\u5217\u6319\u578b\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u53c2\u7167\u3057\u3066\u3044\u307e\u3059\uff084\u884c\u76ee\uff09\uff0e\u3053\u3053\u3067\u306f\uff0cA::C\u306f\uff0c\u2019B_\u2019\u3092\u30ad\u30fc\uff0c\u5024\u3092B\u81ea\u8eab\u3068\u3059\u308b\u9023\u60f3\u914d\u5217\u3068\u306a\u308a\u307e\u3059\uff0e\u5217\u6319\u578b\u306e\u30ad\u30fc\uff0c\u5024\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u969b\u306b\u306f\uff0c\u4f8b\u3048\u3070\uff0cprint(A::C[\u2018B_\u2019].name) \u306b\u3088\u308a\u2019B\u2019\uff0cprint(A::C[\u2018B_\u2019].value)\u306b\u3088\u308a\u2019B_\u2019\u304c\u53d6\u5f97\u3055\u308c\u307e\u3059\uff0e<\/p>\n\n\n\n
\u3000PHP 8.2\u3088\u308a\u4ee5\u524d\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3059\u308b\u3068\uff0c\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u5b9a\u6570\u5f0f\u306b\u4e0d\u6b63\u306a\u64cd\u4f5c\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u3068\u3044\u3046\u81f4\u547d\u7684\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3059\uff0e<\/p>\n\n\n\n
Fatal error: Constant expression contains invalid operations in ..<\/code><\/pre>\n\n\n\n\u6b21\u306b\uff0c\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u8ffd\u52a0\u3057\u3066\u307f\u307e\u3057\u3087\u3046\uff0e<\/p>\n\n\n\n
function f($p = A::B->value) { \/\/ $p='B_'
\u00a0 \u00a0 static $q = A::C['B_']->name; \/\/ $q='B'
\u00a0 \u00a0 print($p.$q);
}
f(); \/\/ B_B<\/code><\/pre>\n\n\n\n\u3053\u306e\u30b3\u30fc\u30c9\u306e\u51fa\u529b\u306f \u2018B_B\u2019\u3068\u306a\u308a\u307e\u3059\uff0e\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\uff0c\u95a2\u6570f()\u3092\u5b9a\u7fa9\u3057\u3066\uff0c\u5217\u6319\u578bA\u306e\u8981\u7d20\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3066\u3044\u307e\u3059\uff0e\u5f15\u6570$p\u306e\u5024\u3092\u6307\u5b9a\u305b\u305a\u306b\u95a2\u6570f()\u3092\u30b3\u30fc\u30eb\u3057\u3066\u3044\u308b\u305f\u3081\uff0c\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\uff08A:B->value\uff09\u304c\u4ee3\u5165\u3055\u308c\u307e\u3059\uff0e\u307e\u305f\uff0c\u6b21\u306e\u884c\u3067\u306f\uff0c\u30d7\u30ed\u30d1\u30c6\u30a3name\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3066\u3044\u307e\u3059\uff0e\u3053\u308c\u3089\u306f\u3044\u305a\u308c\u3082\u904e\u53bb\u306ePHP\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u306f\u8a31\u53ef\u3055\u308c\u3066\u3044\u306a\u304b\u3063\u305f\u51e6\u7406\u3067\u3059\uff0e<\/p>\n\n\n\n
\u3000\u7d9a\u3044\u3066\uff0c\u30af\u30e9\u30b9\u306e\u5185\u90e8\u304b\u3089\u5217\u6319\u578b\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u547c\u3073\u51fa\u3059\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\uff0e<\/p>\n\n\n\n
class C {
\u00a0 \u00a0 public string $p = A::B->name;
}
$obj = new C;
print($obj->p);<\/code><\/pre>\n\n\n\n\u3053\u306e\u30b3\u30fc\u30c9\u306e\u51fa\u529b\u306f\uff0c\u2019B\u2019\u3068\u306a\u308a\u307e\u3059\uff0e\uff12\u884c\u76ee\u3067\u306f\uff0c\u30d1\u30d6\u30ea\u30c3\u30af\u6587\u5b57\u5217\u5909\u6570$p\u306bA::B->name\u306e\u5024\uff08\u2019B\u2019\uff09\u3092\u4ee3\u5165\u3057\u3066\u304a\u308a\uff0c\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\u3055\u308c\u305f\u30af\u30e9\u30b9\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30d7\u30ed\u30d1\u30c6\u30a3$p\u306b\u30a2\u30af\u30bb\u30b9\u3057\u305f\u969b\u306b\u5024\u2019B\u2019\u304c\u51fa\u529b\u3055\u308c\u307e\u3059\uff0e<\/p>\n\n\n\n
\u3000\u5b9f\u969b\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u304c\u5206\u304b\u308a\u3065\u3089\u3044\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\uff0c\u5217\u6319\u578b\u3092\u4f7f\u3046\u969b\u306e\u8a18\u8ff0\u306e\u81ea\u7531\u5ea6\u304c\u4e0a\u304c\u308b\u306e\u304c\u30e1\u30ea\u30c3\u30c8\u3068\u8a00\u3048\u308b\u3068\u601d\u3044\u307e\u3059\uff0e<\/p>\n\n\n\n
true\u578b\u306e\u30b5\u30dd\u30fc\u30c8<\/h4>\n\n\n\n
\u672c\u9023\u8f09\u306e23\u56de\u76ee\u3067\u3054\u7d39\u4ecb\u3057\u305f\u3088\u3046\u306bPHP 8.2\u3067\u306f\uff0cnull\u578b\u304a\u3088\u3073false\u578b\u304c\u8ffd\u52a0\u3055\u308c\u307e\u3059\uff0e\u3053\u308c\u306b\u52a0\u3048\u3066\uff0ctrue\u578b\u3082\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u308b\u3053\u3068\u304c\u6c7a\u5b9a\u3057\u307e\u3057\u305f\uff0e\u5f53\u521d\uff0c\u8ad6\u7406\u5024\u3068\u3057\u3066false\u306e\u307f\u304c\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u305f\u7406\u7531\u306f\uff0c\u5185\u90e8\u95a2\u6570\u306e\u591a\u304f\u306b\u304a\u3044\u3066\u51e6\u7406\u306b\u5931\u6557\u3057\u305f\u969b\u306bfalse\uff0c\u6210\u529f\u3057\u305f\u5834\u5408\u306b\u5185\u90e8\u51e6\u7406\u306b\u57fa\u3065\u304f\u5024\u3092\u8fd4\u3057\u3066\u304a\u308a\uff0c\u7d71\u8a08\u7684\u306bfalse\u578b\u306e\u30b5\u30dd\u30fc\u30c8\u306e\u5fc5\u8981\u6027\u304c\u9ad8\u3044\u3068\u5224\u65ad\u3055\u308c\u305f\u305f\u3081\u3067\u3059\uff0e\u3057\u304b\u3057\uff0cPHP 8.0\u3067ValueError\u4f8b\u5916\u304c\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u4ee5\u964d\uff0c\u51e6\u7406\u304c\u5931\u6557\u3057\u305f\u5834\u5408\u3067\u3082false\u3092\u967d\u306b\u8fd4\u3055\u306a\u3044\u30c7\u30d5\u30a9\u30eb\u30c8\u95a2\u6570\u304c\u5897\u3048\u3066\u304a\u308a\uff0c\u9006\u306b\u8ad6\u7406\u7684\u4e00\u8cab\u6027\u3092\u4fdd\u3064\u305f\u3081\uff0c\u8ad6\u7406\u578b\uff08bool\uff09\u3092\u69cb\u6210\u3059\u308bfalse\u3060\u3051\u3067\u306f\u306a\u304f\uff0ctrue\u3082\u578b\u3068\u3057\u3066\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u304c\u63d0\u6848\u3055\u308c\u307e\u3057\u305f\uff0e<\/p>\n\n\n\n
\u3053\u306e\u63d0\u6848\u306f\u63a1\u629e\u3055\u308c\uff0c\u4f8b\u3048\u3070\uff0c\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u8a18\u8ff0\u304c\u53ef\u80fd\u3068\u306a\u3063\u3066\u3044\u307e\u3059\uff0e<\/p>\n\n\n\n
<?php
class A {
\u00a0 \u00a0 private true $b;
\u00a0 \u00a0 public function get(int|string|true $c): true {}
}<\/code><\/pre>\n\n\n\n\u3000\u4e0a\u306e\u30b3\u30fc\u30c9\u3067\u306f\uff0c\u30af\u30e9\u30b9A\u306e\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30d7\u30ed\u30d1\u30c6\u30a3\u3068\u3057\u3066true\u578b\u306e\u5909\u6570$b\u3092\u5b9a\u7fa9\u3057\u3066\u3044\u307e\u3059\uff0e\u307e\u305f\uff0c\u6574\u6570\uff0c\u6587\u5b57\u5217\u304a\u3088\u3073true\u306e\u5217\u6319\u578b\u5f15\u6570$c\u304a\u3088\u3073true\u578b\u306e\u623b\u308a\u5024\u306e\u30d1\u30d6\u30ea\u30c3\u30af\u30e1\u30bd\u30c3\u30c9get\u3092\u5b9a\u7fa9\u3057\u3066\u3044\u307e\u3059\uff0e\u4e0a\u8a18\u306eget\u30e1\u30bd\u30c3\u30c9\u306e\u5b9a\u7fa9\u3067\uff0c\u4ee5\u4e0b\u306e\u3088\u3046\u306btrue\u3068false\u3092\u540c\u6642\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u305a\uff0c\u30a8\u30e9\u30fc\u3092\u767a\u751f\u3057\u307e\u3059\uff0e<\/p>\n\n\n\n
public function get(int|string|true|false $c): true {}<\/code><\/pre>\n\n\n\n\u3053\u306e\u5834\u5408\u306e\u4ee3\u66ff\u6848\u3068\u3057\u3066\u306f\uff0ctrue|false\u306e\u4ee3\u308f\u308a\u306bbool\u3092\u4f7f\u7528\u3057\u307e\u3059\uff0e<\/p>\n\n\n\n
\u3000\u4eca\u56de\u306f\uff0cPHP 8.2\u306b\u304a\u3051\u308b\u65b0\u6a5f\u80fd\u3068\u3057\u3066\uff0cDNF\u578b\uff0ctrue\u578b\u3068\u3044\u3063\u305f\u65b0\u3057\u3044\u578b\u5b9a\u7fa9\u304a\u3088\u3073\u30d0\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u6642\u306b\u304a\u3051\u308b\u51fa\u529b\u6291\u5236\u306b\u3064\u3044\u3066\u7d39\u4ecb\u3057\u307e\u3057\u305f\uff0e\u6b21\u56de\u306f\uff0cPHP 8.2\u306b\u304a\u3051\u308b\u4e92\u63db\u6027\u306b\u95a2\u9023\u3059\u308b\u5909\u66f4\u70b9\u3068\uff0c\u904e\u53bb\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3068\u306e\u5b9f\u884c\u901f\u5ea6\u6bd4\u8f03\u306b\u3064\u3044\u3066\u7d39\u4ecb\u3059\u308b\u4e88\u5b9a\u3067\u3059\uff0e<\/p>\n","protected":false},"excerpt":{"rendered":"