{"id":3272,"date":"2019-08-19T20:16:55","date_gmt":"2019-08-19T11:16:55","guid":{"rendered":"https:\/\/column.prime-strategy.co.jp\/?p=3272"},"modified":"2022-12-15T06:22:27","modified_gmt":"2022-12-14T21:22:27","slug":"post-3272","status":"publish","type":"post","link":"https:\/\/kusanagi.tokyo\/column\/archives\/column_3272","title":{"rendered":"PHP\u306e\u6700\u65b0\u72b6\u6cc1\uff1aPHP 7.4\u306e\u958b\u767a\u72b6\u6cc1\uff08\u7b2c\u516b\u56de\uff09"},"content":{"rendered":"\n

PHP\u306e\u6700\u65b0\u72b6\u6cc1\uff1aPHP 7.4\u306e\u958b\u767a\u72b6\u6cc1\uff08\u7b2c\u516b\u56de\uff09<\/p>\n\n\n\n

\u307e\u3060\u307e\u3060\u6b8b\u6691\u304c\u53b3\u3057\u3044\u4e2d\u3001\u3044\u304b\u304c\u304a\u904e\u3054\u3057\u3067\u3057\u3087\u3046\u304b\u3002PHP7.4\u306e\u958b\u767a\u306f\u3001\u5f15\u304d\u7d9a\u304d\u30012019\u5e74\u672b\u306e\u30ea\u30ea\u30fc\u30b9\u3092\u76ee\u6a19\u306b\u7d9a\u3051\u3089\u308c\u3066\u3044\u307e\u3059\u3002\u4eca\u56de\u306e\u30b3\u30e9\u30e0\u3067\u306f\u3001\u524d\u56de\u306b\u7d9a\u304d\u3001PHP 7.4\u306b\u304a\u3051\u308b\u5909\u66f4\u70b9\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

<\/span>PHP 8\u306eJIT\u6a5f\u80fd\u306b\u3064\u3044\u3066<\/span><\/h2>\n\n\n\n

\u524d\u56de\u3001PHP\n8\u3067\u5c0e\u5165\u304c\u4e88\u5b9a\u3055\u308c\u308bJIT (Just-In-Time)\u6a5f\u80fd\u306b\u3064\u3044\u3066\u7d39\u4ecb\u3057\u307e\u3057\u305f\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u53c2\u8003\u3068\u3057\u3066\u3001PHP\u306b\u4ed8\u5c5e\u3059\u308b\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u7528\u30b9\u30af\u30ea\u30d7\u30c8\uff08bench.php\u304a\u3088\u3073micro_bench.php\uff09\u306b\u3088\u308b\u30c6\u30b9\u30c8\u306e\u7d50\u679c\u3092\u793a\u3057\u307e\u3057\u305f\u304c\u3001\u7d50\u679c\u306e\u8003\u5bdf\u306b\u3064\u3044\u3066\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u306e\u3067\u3001\u672c\u7a3f\u3067\u88dc\u8db3\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

\u524d\u8a18\u4e8b\u306b\u304a\u3044\u3066\u3001PHP8+jit\u3067\u306fPHP7\u306b\u6bd4\u3079\u3066\u3001\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u7cfb\u3092\u6271\u3046bench.php\u3067\u7d044\u500d\u3001\u30b7\u30f3\u30d7\u30eb\u306a\u8a00\u8a9e\u6a5f\u80fd\u3092\u6271\u3046micro_bench.php\u3067\u7d042\u500d\u3068\u3001\u5b9f\u884c\u901f\u5ea6\u304c\u5927\u5e45\u306b\u9ad8\u901f\u5316\u3055\u308c\u308b\u3053\u3068\u3092\u793a\u3057\u307e\u3057\u305f\u3002\u56f31\u304a\u3088\u3073\u56f32\u306ePHP 7.4\u3068PHP 8.0 JIT\u306e\u7d50\u679c\u306e\u6bd4\u8f03\u304c\u305d\u308c\u306b\u3042\u305f\u308a\u307e\u3059\u3002\u3053\u306e\u7d50\u679c\u306b\u306f\u3001\u6ce8\u610f\u3059\u3079\u304d\u70b9\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u308c\u306f\u3001PHP 8.0\u306eJIT\u304cPHP\u306b\u6a19\u6e96\u642d\u8f09\u3055\u308c\u305f\u30aa\u30da\u30b3\u30fc\u30c9\u30ad\u30e3\u30c3\u30b7\u30e5OPCache\u306e\u4ed5\u7d44\u307f\u306b\u57fa\u3065\u304d\u5b9f\u88c5\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3067\u3059\u3002PHP\u3067\u306f\u3001PHP\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u5b9f\u884c\u3059\u308b\u969b\u3001\u30b9\u30af\u30ea\u30d7\u30c8\u306e\u30b3\u30fc\u30c9\u3092\u30d0\u30a4\u30c8\u30b3\u30fc\u30c9\u306b\u5909\u63db\uff08\u30b3\u30f3\u30d1\u30a4\u30eb\uff09\u3057\u3066\u304b\u3089\u5b9f\u884c\u3057\u307e\u3059\u3002\u30aa\u30da\u30b3\u30fc\u30c9\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u3001\u3053\u306e\u30d0\u30a4\u30c8\u30b3\u30fc\u30c9\u3092\u5171\u6709\u30e1\u30e2\u30ea\u4e0a\u306b\u30ad\u30e3\u30c3\u30b7\u30e5\u3059\u308b\u3053\u3068\u3067\u3001PHP\u30b9\u30af\u30ea\u30d7\u30c8\u306e\u30ed\u30fc\u30c9\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u306b\u8981\u3059\u308b\u6642\u9593\u3092\u7701\u7565\u3057\u3001\u5b9f\u884c\u901f\u5ea6\u3092\u5927\u5e45\u306b\u9ad8\u901f\u5316\u3059\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002PHP\u3067\u306f\u3001\u6a19\u6e96\u3067\u3053\u306e\u4ed5\u7d44\u3092\u5229\u7528\u53ef\u80fd\u3068\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n

PHP\u306eJIT\u306e\u4ed5\u7d44\u307f\u3067\u306f\u3001\u5171\u6709\u30e1\u30e2\u30ea\u4e0a\u306b\u30d0\u30a4\u30c8\u30b3\u30fc\u30c9\u306e\u4ee3\u308f\u308a\u306bJIT\u3067\u5909\u63db\u30fb\u30b3\u30f3\u30d1\u30a4\u30eb\u3055\u308c\u305f\u30cd\u30fc\u30c6\u30a3\u30d6\u306a\u5b9f\u884c\u30b3\u30fc\u30c9\u3092\u914d\u7f6e\u30fb\u5229\u7528\u3057\u307e\u3059\u3002\u3053\u306e\u305f\u3081\u3001\u5f93\u6765\u304b\u3089\u3042\u308b\u30aa\u30da\u30b3\u30fc\u30c9\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u3088\u308b\u9ad8\u901f\u5316\u306e\u52b9\u679c\u3082\u4f75\u305b\u3066\u4eab\u53d7\u3067\u304d\u308b\u3068\u3044\u3046\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

\u305d\u308c\u3067\u306f\u3001\u30aa\u30da\u30b3\u30fc\u30c9\u30ad\u30e3\u30c3\u30b7\u30e5\u76f8\u5f53\u306e\u6a5f\u80fd\u3092\u9664\u3044\u305fJIT\u306e\u6b63\u5473\u306e\u52b9\u679c\u306f\u3069\u306e\u304f\u3089\u3044\u3042\u308b\u3068\u8a00\u3048\u308b\u3067\u3057\u3087\u3046\u304b\uff1f\u3053\u308c\u3092\u8abf\u3079\u308b\u305f\u3081\u3001\u56f31\u3001\u56f32\u306bPHP 7.4\u304a\u3088\u3073PHP 8.0\u3067OPCache\u3092\u6709\u52b9\u306b\u3057\u3066\u6e2c\u5b9a\u3057\u305f\u7d50\u679c\u3082\u793a\u3057\u3066\u3044\u307e\u3059\u3002bench.php (\u56f31)\u306e\u7d50\u679c\u3092\u898b\u308b\u3068\u3001PHP 7.4\u3067OPCache\u3092\u7528\u3044\u306a\u3044\u5834\u5408(\u4e00\u756a\u5de6)\u3068\u7528\u3044\u308b\u5834\u5408(\u5de6\u304b\u30892\u756a\u76ee)\u3067\u7d042\u500d\u306e\u6539\u5584\u52b9\u679c\u304c\u3042\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002\u3053\u306e\u7d50\u679c\u306f\u3001PHP 8.0\u3067OPCache\u306e\u307f\u3092\u6709\u52b9\u306b\u3057\u305f\u7d50\u679c(\u5de6\u304b\u30893\u756a\u76ee)\u3082\u307b\u307c\u540c\u3058\u5024\u3067\u3042\u308b\u3053\u3068\u304b\u3089\u3001\u59a5\u5f53\u306a\u3082\u306e\u3068\u8a00\u3048\u307e\u3059\u3002\u3053\u308c\u3089\u304b\u3089\u3001\u30aa\u30da\u30b3\u30fc\u30c9\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u52b9\u679c\u3092\u9664\u3044\u305fJIT\u306e\u52b9\u679c\u306f\u3001PHP 8.0\u3067OPCache\u306e\u307f\u3092\u6709\u52b9\u306b\u3057\u305f\u7d50\u679c\u3068PHP 8.0\u3067JIT(+OPCache)\u3092\u6709\u52b9\u306b\u3057\u305f\u7d50\u679c\u3092\u6bd4\u8f03\u3059\u308c\u3070\u5f97\u3089\u308c\u308b\u3068\u8003\u3048\u3089\u308c\u3001bench.php(\u56f31)\u3067\u306f\u7d042\u500d\u3001micro_bench.php(\u56f32)\u3067\u306f\u7d0430%\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

\u306a\u304a\u3001\u524d\u7a3f\u306b\u3082\u8a18\u8ff0\u3057\u307e\u3057\u305f\u304c\u3001WordPress\u306e\u3088\u3046\u306a\u5b9f\u7528\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u304a\u3051\u308b\u9ad8\u901f\u5316\u306e\u52b9\u679c\u306f\u307e\u3060\u5c11\u306a\u3044\u3053\u3068\u304c\u5831\u544a\u3055\u308c\u3066\u304a\u308a\u3001\u30d7\u30ed\u30d5\u30a1\u30a4\u30e9\u3084\u6700\u9069\u5316\u7b49\u306e\u7d44\u307f\u5408\u308f\u305b\u306b\u3088\u308b\u66f4\u306a\u308b\u9ad8\u901f\u5316\u304c\u671f\u5f85\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n

\"\"
\u56f31 \u5b9f\u884c\u901f\u5ea6\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u7d50\u679c\u306e\u4f8b(Zend\/bench.php)<\/figcaption><\/figure><\/div>\n\n\n\n
\"\"
\u56f32   \u5b9f\u884c\u901f\u5ea6\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u7d50\u679c\u306e\u4f8b(Zend\/micro_bench.php) <\/figcaption><\/figure><\/div>\n\n\n\n

\u3000\u3082\u3046\u4e00\u3064\u3001PHP\u306e\u9032\u5316\u3092\u793a\u3059\u53c2\u8003\u3068\u3057\u3066\u3001\u904e\u53bb\u306ePHP\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3068\u306e\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u6bd4\u8f03\u3092\u56f33\u306b\u793a\u3057\u307e\u3059\u3002\u540c\u3058\u8a08\u7b97\u6a5f(AMD64)\u3067PHP 4.4\u3067\u306f14\u79d2\u8fd1\u304f\u304b\u304b\u3063\u3066\u3044\u305f\u30b3\u30fc\u30c9\u306e\u5b9f\u884c\u6642\u9593\u304cPHP 5.6\u3067\u306f\u7d043\u79d2\u3068\u306a\u308a\u3001PHP 7.4\u3067\u306f1\u79d2\u4ee5\u4e0b\u3001PHP 8.0\u3067\u306f0.2\u79d2\u306b\u8feb\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002PHP 4.4\u304c\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u305f\u306e\u304c2005\u5e74\u3067\u3059\u306e\u3067\u30012019\u5e74\u306b\u81f3\u308b\u307e\u3067\u306e\u7d0414\u5e74\u306e\u9593\u306b60\u500d\u4ee5\u4e0a\u306e\u9ad8\u901f\u5316\u304c\u5b9f\u73fe\u3055\u308c\u305f\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u9ad8\u901f\u5316\u306f\u3001\u8a08\u7b97\u6a5f(CPU)\u81ea\u4f53\u306e\u9ad8\u901f\u5316\u306b\u3088\u308b\u3082\u306e\u3067\u306f\u306a\u304f\u3001\u4e3b\u306bPHP\u30b9\u30af\u30ea\u30d7\u30c8\u306e\u5b9f\u884c\u306b\u95a2\u308f\u308b\u6280\u8853\u306e\u9032\u6b69\u306b\u3088\u308b\u3082\u306e\u3067\u3042\u308a\u3001PHP\u306e\u958b\u767a\u306b\u95a2\u308f\u308b\u958b\u767a\u8005\u306e\u6210\u679c\u3067\u3042\u308b\u3068\u8a00\u3048\u307e\u3059\u3002\u3042\u304f\u306a\u304d\u6539\u826f\u3092\u3059\u3059\u3081\u308b\u958b\u767a\u8005\u306e\u52aa\u529b\u306b\u306f\u982d\u306e\u4e0b\u304c\u308b\u601d\u3044\u3067\u3059\u3002<\/p>\n\n\n\n

\"\"
\u56f33   \u6b74\u4ee3PHP\u306b\u3088\u308b\u5b9f\u884c\u901f\u5ea6\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u7d50\u679c\u306e\u4f8b(Zend\/bench.php) <\/figcaption><\/figure><\/div>\n\n\n\n

<\/span>PHP 7.4\u306e\u958b\u767a\u72b6\u6cc1<\/span><\/h2>\n\n\n\n

\u3000PHP\u306e\u6700\u65b0\u7248\u3067\u3042\u308b\u30d0\u30fc\u30b8\u30e7\u30f37\u306e\u6700\u65b0\u7248\u306fPHP 7.3\u3067\u3059\u304c\u3001\u6b21\u306e\u30de\u30a4\u30ca\u30fc\u30d0\u30fc\u30b8\u30e7\u30f3\u30a2\u30c3\u30d7\u7248\u306b\u3042\u305f\u308bPHP 7.4\u306e\u958b\u767a\u306f\u9806\u8abf\u306b\u9032\u3093\u3067\u3044\u307e\u3059\u3002\u3053\u308c\u307e\u3067\u306b\u3001PHP 7.4\u7248\u306b\u542b\u307e\u308c\u308b\u6a5f\u80fd\u3092\u7de0\u5207\u308b\u30d5\u30a3\u30fc\u30c1\u30e3\u30fc\u30d5\u30ea\u30fc\u30ba\u304c\u8a08\u753b\u901a\u308a7\u670822\u65e5\u306b\u5b9f\u65bd\u3055\u308c\u30017\u670825\u65e5\u306b\u03b21\u30018\u67088\u65e5\u306b\u03b22\u304c\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u5f8c8\u670822\u65e5\u306b\u6700\u5f8c\u306e\u30d9\u30fc\u30bf\u7248\u3067\u3042\u308b\u03b23\u304c\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u30019\u6708\u304b\u3089\u30ea\u30ea\u30fc\u30b9\u5019\u88dc\u7248\u304c6\u56de\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u308b\u8a08\u753b\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n

 PHP 7.4\u306e\u4ee5\u4e0b\u306b\u793a\u3059\u4e3b\u306a\u65b0\u6a5f\u80fd\u306b\u3064\u3044\u3066\u7d39\u4ecb\u3057\u3066\u304d\u307e\u3057\u305f\u3002<\/p>\n\n\n\n

  1. OpCache\u306e\u30d7\u30ea\u30ed\u30fc\u30c9\u6a5f\u80fd<\/li>
  2. \u30af\u30e9\u30b9\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u578b\u6307\u5b9a\u8ffd\u52a0<\/li>
  3. FFI (Foreign\nFunction Interface)\u6a5f\u80fd<\/li>
  4. \u914d\u5217\u30b9\u30d7\u30ec\u30c3\u30c9\u69cb\u6587<\/li>
  5. \u30a2\u30ed\u30fc\u95a2\u6570<\/li>
  6. ??= \u69cb\u6587<\/li><\/ol>\n\n\n\n

    \u3000\u3053\u306e\u3046\u3061\u3001\u6700\u521d\u306e3\u9805\u76ee\u306b\u3064\u3044\u3066\u306f\u3059\u3067\u306b\u7d39\u4ecb\u6e08\u307f\u3067\u3059\u306e\u3067\u3001\u4eca\u56de\u306f4\u4ee5\u964d\u306b\u3064\u3044\u3066\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

    <\/span>\u914d\u5217\u30b9\u30d7\u30ec\u30c3\u30c9\u69cb\u6587 <\/span><\/h2>\n\n\n\n

    \u30b9\u30d7\u30ec\u30c3\u30c9\u69cb\u6587\u306b\u3088\u308a\u3001\u914d\u5217\u306e\u5185\u90e8\u3067\u5225\u306e\u914d\u5217\u306e\u81ea\u52d5\u30a2\u30f3\u30d1\u30c3\u30af\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u30b9\u30d7\u30ec\u30c3\u30c9\u69cb\u6587\u306fJavaScript\u306b\u5b9f\u88c5\u3055\u308c\u3066\u3044\u308b\u6a5f\u80fd\u306b\u985e\u4f3c\u3057\u3066\u3044\u308b\u3082\u306e\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n

    \u30ea\u30b9\u30c81\n\u914d\u5217\u30b9\u30d7\u30ec\u30c3\u30c9\u69cb\u6587\u306e\u4f8b<\/p>\n\n\n\n

    ----------------------------------------------------------<\/p>\n\n\n\n

    $a = [3,4];<\/p>\n\n\n\n

    $b =\n[1,2,...$a,5];  \/\/ \u914d\u5217 $b=[1,2,3,4,5]<\/p>\n\n\n\n

    function\nfoo() { for ($i=1;$i<5;$i++){ yield $i;}}<\/p>\n\n\n\n

    $c =\n[...foo()]; \/\/ \u914d\u5217 $c=[1,2,3,4]<\/p>\n\n\n\n

    ----------------------------------------------------------<\/p>\n\n\n\n

    \u914d\u5217$b\u3092\u5b9a\u7fa9\u3059\u308b\u969b\u306b\u2018...\u2019\u306e\u5f8c\u306b\u5225\u306e\u914d\u5217$a\u3092\u6307\u5b9a\u3059\u308b\u3068\u3001\u305d\u306e\u914d\u5217\u306e\u8981\u7d20\u304c\u81ea\u52d5\u7684\u306b\u5c55\u958b\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u69cb\u6587\u3067\u306f\u3001\u4e0a\u8a18\u306e\u914d\u5217$c\u306e\u3088\u3046\u306b\u3001\u914d\u5217\u306e\u4ee3\u308f\u308a\u306b\u30a4\u30bf\u30ec\u30fc\u30bf\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n

    <\/span>\u30a2\u30ed\u30fc\u95a2\u6570 <\/span><\/h2>\n\n\n\n

    \u3053\u306e\u6a5f\u80fd\u306f\u3001\u533f\u540d\u95a2\u6570\u306e\u8a18\u8ff0\u3092\u7c21\u7565\u5316\u3057\u3066\u304f\u308c\u308b\u3082\u306e\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u3088\u3046\u306barray_map\u95a2\u6570\u3067\u914d\u5217\u3092\u5b9a\u7fa9\u3059\u308b\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n

    \u30ea\u30b9\u30c82\n\u533f\u540d\u95a2\u6570\u3092\u7528\u3044\u3066array_map\u95a2\u6570\u3067\u914d\u5217\u3092\u5b9a\u7fa9\u3059\u308b\u4f8b<\/p>\n\n\n\n

    ----------------------------------------------------------<\/p>\n\n\n\n

    $y=1;<\/p>\n\n\n\n

    $a=[1,2,3];<\/p>\n\n\n\n

    $c =\narray_map(function ($x) use ($y) { <\/p>\n\n\n\n

    return\n($x*$x+$y); },$a)); \/\/ \u914d\u5217 $c=[2,5,10]<\/p>\n\n\n\n

    ----------------------------------------------------------<\/p>\n\n\n\n

    \u3053\u306e\u4f8b\u3067\u306f\u3001\u914d\u5217\u306e\u8981\u7d20\u3092\u8fd4\u3059\u4ee5\u4e0b\u306e\u533f\u540d\u95a2\u6570\u3092\u5b9a\u7fa9\u3057\u3066\u3001array_map\u95a2\u6570\u306e\u7b2c\u4e00\u5f15\u6570\u306b\u6307\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n

    ----------------------------------------------------------<\/p>\n\n\n\n

    function\n($x) use ($y) { <\/p>\n\n\n\n

    return\n($x*$x+$y); <\/p>\n\n\n\n

    \u3000}<\/p>\n\n\n\n

    ----------------------------------------------------------<\/p>\n\n\n\n

    \u65b0\u3057\u304f\u5b9a\u7fa9\u3055\u308c\u308b\u30a2\u30ed\u30fc\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u3053\u306e\u533f\u540d\u95a2\u6570\u306e\u8a18\u8ff0\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u7c21\u7565\u5316\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n

    ------------------------------------------------------------<\/p>\n\n\n\n

    \u3000\u3000fn($x)=>$x*$x+$y<\/p>\n\n\n\n

    ------------------------------------------------------------<\/p>\n\n\n\n

    \u5f93\u6765\u306e\u533f\u540d\u95a2\u6570\u3068\u7570\u306a\u308a\u3001\u89aa\u30b9\u30b3\u30fc\u30d7\u306e\u5909\u6570($y)\u3092\u5024\u6e21\u3057\u3067\u53c2\u7167\u53ef\u80fd\u3067\u3059\u3002\u3053\u306e\u69cb\u6587\u3092\u5229\u7528\u3059\u308b\u3068\u3001\u30ea\u30b9\u30c82\u306b\u793a\u3057\u305f\u4f8b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3059\u3063\u304d\u308a\u3068\u8a18\u8ff0\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n

    \u30ea\u30b9\u30c83\n\u30a2\u30ed\u30fc\u95a2\u6570\u3092\u7528\u3044\u3066array_map\u95a2\u6570\u3067\u914d\u5217\u3092\u5b9a\u7fa9\u3059\u308b\u4f8b<\/p>\n\n\n\n

    ----------------------------------------------------------<\/p>\n\n\n\n

    $y=1;<\/p>\n\n\n\n

    $a=[1,2,3];<\/p>\n\n\n\n

    $c =\narray_map(fn($x)=>$x*$x+$y,$a)); \/\/ \u914d\u5217 $c=[2,5,10]<\/p>\n\n\n\n

    ----------------------------------------------------------<\/p>\n\n\n\n

    \u306a\u304a\u3001\u3053\u306e\u30a2\u30ed\u30fc\u69cb\u6587\u306e\u8ffd\u52a0\u306b\u3088\u308a\u3001fn\u306fPHP\u306e\u4e88\u7d04\u8a9e\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u306e\u3067\u3001\u5f93\u6765\u306e\u30b3\u30fc\u30c9\u3067\u4f7f\u7528\u3055\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

    <\/span>??=\u69cb\u6587 <\/span><\/h2>\n\n\n\n

    \u3042\u308b\u914d\u5217\u306e\u8981\u7d20\u304c\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u304c\u4e0d\u660e\u306a\u5834\u5408\u3001\u5f93\u6765\u3001PHP 5\u307e\u3067\u306f\u4f8b\u3048\u30703\u9805\u6f14\u7b97\u5b50\uff08A ?\nB : C\uff09\u3092\u7528\u3044\u3066\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u8a18\u8ff0\u3092\u3057\u3066\u3044\u307e\u3057\u305f\u3002<\/p>\n\n\n\n

    ----------------------------------------------------------<\/p>\n\n\n\n

    $a['user']\n= isset($a['user']) ?  $a['user'] : 'nobody';<\/p>\n\n\n\n

    ----------------------------------------------------------<\/p>\n\n\n\n

    \u3053\u306e\u4f8b\u3067\u306f\u3001$a[\u2018user\u2019]\u304c\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u304b\u3092\u78ba\u8a8d\u3057\u3001\u78ba\u8a8d\u3055\u308c\u3066\u3044\u306a\u3044\u5834\u5408\u306b\u306f\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3068\u3057\u3066\u2019nobody\u2019\u3092\u4ee3\u5165\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

    PHP 7.0\u3067\u306f\u3001NULL\u5408\u4f53\u6f14\u7b97\u5b50\u304c\u5c0e\u5165\u3055\u308c\u3001\u4e0a\u8a18\u306e\u4f8b\u3092\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u7c21\u6613\u7684\u306b\u8a18\u8ff0\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n

    ----------------------------------------------------------<\/p>\n\n\n\n

    $a['user']\n= $a['user'] ?? 'nobody';<\/p>\n\n\n\n

    ----------------------------------------------------------<\/p>\n\n\n\n

     NULL\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u90e8\u5206\u306e\u8a18\u8ff0\u304c\u4e0d\u8981\u3068\u306a\u308a\u3001\u30b7\u30f3\u30d7\u30eb\u306b\u8a18\u8ff0\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002PHP 7.4\u3067\u306f\u3001\u3053\u306e\u69cb\u6587\u304c\u66f4\u306b\u7c21\u7565\u5316\u3055\u308c\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

    ----------------------------------------------------------<\/p>\n\n\n\n

    $a['user']\n??= 'nobody';<\/p>\n\n\n\n

    ----------------------------------------------------------<\/p>\n\n\n\n

     \u3053\u306e\u69cb\u6587\u306f\u3001NULL\u5408\u4f53\u6f14\u7b97\u5b50\u3092\u62e1\u5f35\u3057\u305f\u3082\u306e\u3067\u3001\u3042\u308b\u5909\u6570\u304cNULL\u3067\u3042\u308b\u5834\u5408\u306b\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u4ee3\u5165\u3059\u308b\u3068\u3044\u3063\u305f\u3088\u3046\u306a\u6a19\u6e96\u7684\u306a\u51e6\u7406\u3092\u3088\u308a\u30b7\u30f3\u30d7\u30eb\u306b\u8a18\u8ff0\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

    \u6b21\u56de\u4ee5\u964d\u3067\u306f\u3001\u6b8b\u308bPHP 7.4\u306e\u7d39\u4ecb\u3068\u4e00\u90e8\u5ec3\u6b62\u3055\u308c\u308b\u6a5f\u80fd\u306a\u3069\u306b\u3064\u3044\u3066\u7d39\u4ecb\u3059\u308b\u4e88\u5b9a\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

    PHP\u306e\u6700\u65b0\u72b6\u6cc1\uff1aPHP 7.4\u306e\u958b\u767a\u72b6\u6cc1\uff08\u7b2c\u516b\u56de\uff09 \u307e\u3060\u307e\u3060\u6b8b\u6691\u304c\u53b3\u3057\u3044\u4e2d\u3001\u3044\u304b\u304c\u304a\u904e\u3054\u3057\u3067\u3057\u3087\u3046\u304b\u3002PHP7.4\u306e\u958b\u767a\u306f\u3001\u5f15\u304d\u7d9a\u304d\u300120 ... Read more<\/a><\/p>\n","protected":false},"author":14,"featured_media":1280,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"content-type":"","footnotes":""},"categories":[13,15],"tags":[],"series":[50],"journey":[],"product":[],"class_list":["post-3272","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-oss","category-php","series-php-column-hiirokawa","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-33","no-featured-image-padding"],"yoast_head":"\nPHP\u306e\u6700\u65b0\u72b6\u6cc1\uff1aPHP 7.4\u306e\u958b\u767a\u72b6\u6cc1\uff08\u7b2c\u516b\u56de\uff09 - KUSANAGI Tech Column<\/title>\n<meta name=\"description\" content=\"\u300cPHP 7.4\u306e\u958b\u767a\u72b6\u6cc1\u3068\u65b0\u6a5f\u80fd\u3001PHP8\u306eJIT\u6a5f\u80fd\u3092\u63a2\u308b\u300d\u3067\u306f\u3001PHP 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content=\"https:\/\/kusanagi.tokyo\/column\/archives\/column_3272\" \/>\n<meta property=\"og:site_name\" content=\"KUSANAGI Tech Column\" \/>\n<meta property=\"article:published_time\" content=\"2019-08-19T11:16:55+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-12-14T21:22:27+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2017\/09\/hirokawarui.gif\" \/>\n\t<meta property=\"og:image:width\" content=\"650\" \/>\n\t<meta property=\"og:image:height\" content=\"330\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/gif\" \/>\n<meta name=\"author\" content=\"\u5ee3\u5ddd\u985e\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@kusanagi_saya\" \/>\n<meta name=\"twitter:site\" content=\"@kusanagi_saya\" \/>\n<script type=\"application\/ld+json\" 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