{"id":5445,"date":"2020-11-29T23:30:00","date_gmt":"2020-11-29T14:30:00","guid":{"rendered":"https:\/\/www.programming-se.com\/?p=5445"},"modified":"2020-11-29T23:34:21","modified_gmt":"2020-11-29T14:34:21","slug":"php-8-0-0-%e6%ad%a3%e5%bc%8f%e3%83%aa%e3%83%aa%e3%83%bc%e3%82%b9","status":"publish","type":"post","link":"https:\/\/www.programming-se.com\/?p=5445","title":{"rendered":"PHP 8.0.0 \u6b63\u5f0f\u30ea\u30ea\u30fc\u30b9 JIT\u306e\u5b9f\u88c5\u306b\u3088\u308a\u9ad8\u901f\u5316"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">PHP\u306e\u6700\u65b0\u7248\u300c8.0.0\u300d\u304c\u6b63\u5f0f\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img alt="" decoding=\"async\" width=\"1024\" height=\"650\" data-src=\"https:\/\/www.programming-se.com\/wp-content\/uploads\/2020\/11\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2020-11-29-23.16.07-1024x650.jpg\" alt=\"\" class=\"wp-image-5448 lazyload\" data-srcset=\"https:\/\/www.programming-se.com\/wp-content\/uploads\/2020\/11\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2020-11-29-23.16.07-1024x650.jpg 1024w, https:\/\/www.programming-se.com\/wp-content\/uploads\/2020\/11\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2020-11-29-23.16.07-300x190.jpg 300w, https:\/\/www.programming-se.com\/wp-content\/uploads\/2020\/11\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2020-11-29-23.16.07-768x487.jpg 768w, https:\/\/www.programming-se.com\/wp-content\/uploads\/2020\/11\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2020-11-29-23.16.07.jpg 1190w\" data-sizes=\"(max-width: 1024px) 100vw, 1024px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1024px; --smush-placeholder-aspect-ratio: 1024\/650;\" \/><noscript><img decoding=\"async\" width=\"1024\" height=\"650\" data-src=\"https:\/\/www.programming-se.com\/wp-content\/uploads\/2020\/11\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2020-11-29-23.16.07-1024x650.jpg\" alt=\"\" class=\"wp-image-5448 lazyload\" data-srcset=\"https:\/\/www.programming-se.com\/wp-content\/uploads\/2020\/11\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2020-11-29-23.16.07-1024x650.jpg 1024w, https:\/\/www.programming-se.com\/wp-content\/uploads\/2020\/11\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2020-11-29-23.16.07-300x190.jpg 300w, https:\/\/www.programming-se.com\/wp-content\/uploads\/2020\/11\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2020-11-29-23.16.07-768x487.jpg 768w, https:\/\/www.programming-se.com\/wp-content\/uploads\/2020\/11\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2020-11-29-23.16.07.jpg 1190w\" data-sizes=\"(max-width: 1024px) 100vw, 1024px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1024px; --smush-placeholder-aspect-ratio: 1024\/650;\" \/></noscript><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>PHP 8.0 is a major update of the PHP language.<br>It contains many new features and optimizations including named arguments, union types, attributes, constructor property promotion, match expression, nullsafe operator, JIT, and improvements in the type system, error handling, and consistency.<\/p><cite>https:\/\/www.php.net\/releases\/8.0\/en.php<\/cite><\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">JIT\u306b\u3088\u308aPHP7\u306b\u6bd4\u3079\u9ad8\u901f\u5316\u3055\u308c\u3066\u3044\u308b<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">PHP8.0.0\u306f\u5b9f\u884c\u6642\u306e\u30b3\u30f3\u30d1\u30a4\u30e9<strong>JIT\uff08Just In Time\uff09<\/strong>\u306e\u5c0e\u5165\u306b\u3088\u308a\u3001\u4ee5\u524d\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u6bd4\u3079\u5b9f\u884c\u901f\u5ea6\u304c\u9ad8\u901f\u5316\u3055\u308c\u305f\u69d8\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">PHP 8 \u306e\u65b0\u6a5f\u80fd<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u305d\u306e\u4ed6PHP8\u306e\u65b0\u6a5f\u80fd\u306f\u4ee5\u4e0b\u306e\u5185\u5bb9\u304c\u767a\u8868\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Union\u578b2.0<\/li><li>\u540d\u524d\u4ed8\u304d\u5f15\u6570<\/li><li>match\u5f0f<\/li><li>\u30a2\u30c8\u30ea\u30d3\u30e5\u30fc\u30c8<\/li><li>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u30d7\u30ed\u30d1\u30c6\u30a3\u30d7\u30ed\u30e2\u30fc\u30b7\u30e7\u30f3<\/li><li>Null\u5b89\u5168\u6f14\u7b97\u5b50<\/li><li>Weak Maps<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee5\u4e0b\u30aa\u30d5\u30a3\u30b7\u30e3\u30eb\u3067\u63b2\u8f09\u3055\u308c\u3066\u3044\u308b\u30b3\u30fc\u30c9\u4f8b\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"wp-block-urvanov-syntax-highlighter-code-block\"><pre class=\"lang:default decode:true \" title=\"Named arguments\" >\/\/ PHP7\nhtmlspecialchars($string, ENT_COMPAT | ENT_HTML401, 'UTF-8', false);\n\n\/\/ PHP8\nhtmlspecialchars($string, double_encode: false);<\/pre><\/div>\n\n\n\n<div class=\"wp-block-urvanov-syntax-highlighter-code-block\"><pre class=\"lang:default decode:true \" title=\"Attributes\" >\/\/ PHP7\nclass PostsController\n{\n \/**\n * @Route(\"\/api\/posts\/{id}\", methods={\"GET\"})\n *\/\n public function get($id) { \/* ... *\/ }\n}\n\n\/\/ PHP8\nclass PostsController\n{\n #[Route(\"\/api\/posts\/{id}\", methods: [\"GET\"])]\n public function get($id) { \/* ... *\/ }\n}<\/pre><\/div>\n\n\n\n<div class=\"wp-block-urvanov-syntax-highlighter-code-block\"><pre class=\"lang:default decode:true \" title=\"Constructor property promotion\" >\/\/ PHP7\nclass Point {\n public float $x;\n public float $y;\n public float $z;\n\n public function __construct(\n float $x = 0.0,\n float $y = 0.0,\n float $z = 0.0,\n ) {\n $this-&gt;x = $x;\n $this-&gt;y = $y;\n $this-&gt;z = $z;\n }\n}\n\n\/\/ PHP8\nclass Point {\n public function __construct(\n public float $x = 0.0,\n public float $y = 0.0,\n public float $z = 0.0,\n ) {}\n}<\/pre><\/div>\n\n\n\n<div class=\"wp-block-urvanov-syntax-highlighter-code-block\"><pre class=\"lang:default decode:true \" title=\"Union types\" >\/\/ PHP7\nclass Number {\n \/** @var int|float *\/\n private $number;\n\n \/**\n * @param float|int $number\n *\/\n public function __construct($number) {\n $this-&gt;number = $number;\n }\n}\n\nnew Number('NaN'); \/\/ Ok\n\n\/\/ PHP8\nclass Number {\n public function __construct(\n private int|float $number\n ) {}\n}\n\nnew Number('NaN'); \/\/ TypeError<\/pre><\/div>\n\n\n\n<div class=\"wp-block-urvanov-syntax-highlighter-code-block\"><pre class=\"lang:default decode:true \" title=\"Match expression\" >\/\/ PHP7\nswitch (8.0) {\n case '8.0':\n $result = \"Oh no!\";\n break;\n case 8.0:\n $result = \"This is what I expected\";\n break;\n}\necho $result;\n\/\/&gt; Oh no!\n\n\/\/ PHP8\necho match (8.0) {\n '8.0' =&gt; \"Oh no!\",\n 8.0 =&gt; \"This is what I expected\",\n};\n\/\/&gt; This is what I expected<\/pre><\/div>\n\n\n\n<div class=\"wp-block-urvanov-syntax-highlighter-code-block\"><pre class=\"lang:default decode:true \" title=\"Nullsafe operator\" >\/\/ PHP7\n$country = null;\n\nif ($session !== null) {\n $user = $session-&gt;user;\n\n if ($user !== null) {\n $address = $user-&gt;getAddress();\n \n if ($address !== null) {\n $country = $address-&gt;country;\n }\n }\n}\n\n\/\/ PHP8\n$country = $session?-&gt;user?-&gt;getAddress()?-&gt;country;<\/pre><\/div>\n\n\n\n<div class=\"wp-block-urvanov-syntax-highlighter-code-block\"><pre class=\"lang:default decode:true \" title=\"Saner string to number comparisons\" >\/\/ PHP7\n0 == 'foobar' \/\/ true\n\n\/\/ PHP8\n0 == 'foobar' \/\/ false<\/pre><\/div>\n\n\n\n<div class=\"wp-block-urvanov-syntax-highlighter-code-block\"><pre class=\"lang:default decode:true \" title=\"Consistent type errors for internal functions\" >\/\/ PHP7\nstrlen([]); \/\/ Warning: strlen() expects parameter 1 to be string, array given\n\narray_chunk([], -1); \/\/ Warning: array_chunk(): Size parameter expected to be greater than 0\n\n\n\/\/ PHP8\nstrlen([]); \/\/ TypeError: strlen(): Argument #1 ($str) must be of type string, array given\n\narray_chunk([], -1); \/\/ ValueError: array_chunk(): Argument #2 ($length) must be greater than 0<\/pre><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">\u30d7\u30ed\u30b0\u30e9\u30e0\u306b\u3088\u3063\u3066\u306f\u4fee\u6b63\u304c\u5fc5\u8981<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">PHP5\u7cfb\u304b\u3089PHP7\u7cfb\u3078\u306e\u79fb\u884c\u3082\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u4fee\u6b63\u304c\u5fc5\u8981\u3067\u3057\u305f\u304c\u3001PHP8\u7cfb\u3078\u306e\u79fb\u884c\u3082\u30b5\u30f3\u30d7\u30eb\u3092\u898b\u308b\u9650\u308a\u4fee\u6b63\u304c\u5fc5\u8981\u306b\u306a\u308a\u305d\u3046\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>PHP\u306e\u6700\u65b0\u7248\u300c8.0.0\u300d\u304c\u6b63\u5f0f\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u307e\u3057\u305f\u3002 PHP 8.0 is a major update of the PHP language.It contains many new features and op [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":5447,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[371,111],"class_list":["post-5445","post","type-post","status-publish","format-standard","has-post-thumbnail","category-php","tag-php8","tag-111"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>PHP 8.0.0 \u6b63\u5f0f\u30ea\u30ea\u30fc\u30b9 JIT\u306e\u5b9f\u88c5\u306b\u3088\u308a\u9ad8\u901f\u5316 - \u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3084\u526f\u696d\u30fb\u30d5\u30ea\u30fc\u30e9\u30f3\u30b9\u306b\u95a2\u3059\u308b\u60c5\u5831<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.programming-se.com\/?p=5445\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PHP 8.0.0 \u6b63\u5f0f\u30ea\u30ea\u30fc\u30b9 JIT\u306e\u5b9f\u88c5\u306b\u3088\u308a\u9ad8\u901f\u5316 - \u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3084\u526f\u696d\u30fb\u30d5\u30ea\u30fc\u30e9\u30f3\u30b9\u306b\u95a2\u3059\u308b\u60c5\u5831\" \/>\n<meta property=\"og:description\" content=\"PHP\u306e\u6700\u65b0\u7248\u300c8.0.0\u300d\u304c\u6b63\u5f0f\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u307e\u3057\u305f\u3002 PHP 8.0 is a major update of the PHP language.It contains many new features and op [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.programming-se.com\/?p=5445\" \/>\n<meta property=\"og:site_name\" content=\"\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3084\u526f\u696d\u30fb\u30d5\u30ea\u30fc\u30e9\u30f3\u30b9\u306b\u95a2\u3059\u308b\u60c5\u5831\" \/>\n<meta property=\"article:published_time\" content=\"2020-11-29T14:30:00+00:00\" \/>\n<meta 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