{"id":17654,"date":"2024-03-16T07:20:08","date_gmt":"2024-03-15T22:20:08","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/php%e3%81%a7empty%e9%96%a2%e6%95%b0%e3%82%92%e4%bd%bf%e7%94%a8%e3%81%97%e3%81%a6%e3%80%810%e3%81%ae%e5%b9%b2%e6%b8%89%e3%82%92%e3%83%95%e3%82%a3%e3%83%ab%e3%82%bf%e3%83%aa%e3%83%b3%e3%82%b0%e3%81%99\/"},"modified":"2025-08-06T12:53:07","modified_gmt":"2025-08-06T03:53:07","slug":"php%e3%81%a7empty%e9%96%a2%e6%95%b0%e3%82%92%e4%bd%bf%e7%94%a8%e3%81%97%e3%81%a6%e3%80%810%e3%81%ae%e5%b9%b2%e6%b8%89%e3%82%92%e3%83%95%e3%82%a3%e3%83%ab%e3%82%bf%e3%83%aa%e3%83%b3%e3%82%b0%e3%81%99","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/php%e3%81%a7empty%e9%96%a2%e6%95%b0%e3%82%92%e4%bd%bf%e7%94%a8%e3%81%97%e3%81%a6%e3%80%810%e3%81%ae%e5%b9%b2%e6%b8%89%e3%82%92%e3%83%95%e3%82%a3%e3%83%ab%e3%82%bf%e3%83%aa%e3%83%b3%e3%82%b0%e3%81%99\/","title":{"rendered":"php\u3067empty\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u30010\u306e\u5e72\u6e09\u3092\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3059\u308b\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\uff1f"},"content":{"rendered":"

PHP\u3067\u3001\u5909\u6570\u304c\u7a7a\u304b\u3069\u3046\u304b\u3092\u691c\u51fa\u3059\u308b\u305f\u3081\u306bempty()\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3057\u304b\u3057\u306a\u304c\u3089\u3001empty()\u95a2\u6570\u306e\u5224\u5b9a\u6761\u4ef6\u306f\u7de9\u3084\u304b\u3067\u3042\u308a\u3001\u4ee5\u4e0b\u306e\u72b6\u6cc1\u3092\u7a7a\u3068\u307f\u306a\u3057\u307e\u3059\uff1a<\/p>\n

    \n
  1. \u5909\u6570\u304c0\u307e\u305f\u306f\u6587\u5b57\u5217”0″\u306e\u5834\u5408\u3001\u7a7a\u3068\u5224\u65ad\u3055\u308c\u307e\u3059\u3002<\/li>\n
  2. \u5909\u6570\u304c\u7a7a\u306e\u6587\u5b57\u5217””\u306e\u5834\u5408\u3002<\/li>\n
  3. \u5909\u6570\u304cNULL\u306e\u5834\u5408\u3002<\/li>\n
  4. \u5909\u6570\u304c\u7a7a\u306e\u914d\u5217\u3067\u3042\u308b\u5834\u5408\u3002<\/li>\n<\/ol>\n

    \u3057\u305f\u304c\u3063\u3066\u30010\u306e\u5e72\u6e09\u3092\u9664\u5916\u3057\u305f\u3044\u5834\u5408\u306f\u3001\u5909\u6570\u304c\u7a7a\u3067\u3042\u308b\u304b\u3069\u3046\u304b\u3092\u5224\u65ad\u3059\u308b\u305f\u3081\u306b\u3088\u308a\u53b3\u683c\u306a\u6761\u4ef6\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3044\u304f\u3064\u304b\u306e\u4e00\u822c\u7684\u306a\u65b9\u6cd5\u3067\u3059\uff1a<\/p>\n

      \n
    1. I cannot believe how quickly time has passed. \u2192 \u6642\u9593\u304c\u3069\u308c\u3060\u3051\u65e9\u304f\u904e\u304e\u305f\u304b\u4fe1\u3058\u3089\u308c\u306a\u3044\u3002<\/li>\n<\/ol>\n
      if<\/span> ($var<\/span> === 0<\/span>) {\r\n    \/\/ \u53d8\u91cf\u4e3a0<\/span>\r\n} else<\/span> {\r\n    \/\/ \u53d8\u91cf\u4e0d\u4e3a0<\/span>\r\n}\r\n<\/code><\/pre>\n
        \n
      1. \u30c8\u30ea\u30df\u30f3\u30b0\u3059\u308b<\/li>\n<\/ol>\n
        if<\/span> (trim<\/span>(strval<\/span>($var<\/span>)) == \"\"<\/span>) {\r\n    \/\/ \u53d8\u91cf\u4e3a\u7a7a<\/span>\r\n} else<\/span> {\r\n    \/\/ \u53d8\u91cf\u4e0d\u4e3a\u7a7a<\/span>\r\n}\r\n<\/code><\/pre>\n
          \n
        1. is_numeric() -> \u6570\u5b57\u3067\u3042\u308b<\/li>\n<\/ol>\n
          if<\/span> (is_numeric<\/span>($var<\/span>) && $var<\/span> != 0<\/span>) {\r\n    \/\/ \u53d8\u91cf\u4e3a\u975e\u96f6\u6570\u5b57<\/span>\r\n} else<\/span> {\r\n    \/\/ \u53d8\u91cf\u4e3a\u7a7a\u6216\u4e3a0<\/span>\r\n}\r\n<\/code><\/pre>\n
          \u5177\u4f53\u306e\u30cb\u30fc\u30ba\u306b\u5fdc\u3058\u3066\u30010\u306e\u5e72\u6e09\u3092\u6392\u9664\u3059\u308b\u9069\u5207\u306a\u65b9\u6cd5\u3092\u9078\u629e\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
          PHP\u3067\u3001\u5909\u6570\u304c\u7a7a\u304b\u3069\u3046\u304b\u3092\u691c\u51fa\u3059\u308b\u305f\u3081\u306bempty()\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3057\u304b\u3057\u306a\u304c\u3089\u3001empty()\u95a2\u6570\u306e\u5224\u5b9a\u6761\u4ef6\u306f\u7de9\u3084\u304b\u3067\u3042\u308a\u3001\u4ee5\u4e0b\u306e\u72b6\u6cc1\u3092\u7a7a\u3068\u307f\u306a\u3057\u307e\u3059\uff1a \u5909\u6570\u304c0\u307e\u305f\u306f\u6587\u5b57\u5217”0&#824 […]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[26,61],"class_list":["post-17654","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-26","tag-61"],"yoast_head":"\nphp\u3067empty\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u30010\u306e\u5e72\u6e09\u3092\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3059\u308b\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\uff1f - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"php\u3067empty\u95a2\u6570\u3092\u4f7f\u7528\u3057\u30660\u306e\u5e72\u6e09\u3092\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3059\u308b\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\uff1f\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3002\u5b9f\u8df5\u7684\u306a\u4f8b\u3068\u30b3\u30fc\u30c9\u3001\u6ce8\u610f\u70b9\u3092\u542b\u3081\u3066\u521d\u5fc3\u8005\u306b\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u8aac\u660e\u3057\u307e\u3059\u3002\" \/>\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.silicloud.com\/ja\/blog\/php\u3067empty\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u30010\u306e\u5e72\u6e09\u3092\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3059\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"php\u3067empty\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u30010\u306e\u5e72\u6e09\u3092\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3059\u308b\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\uff1f\" \/>\n<meta property=\"og:description\" content=\"php\u3067empty\u95a2\u6570\u3092\u4f7f\u7528\u3057\u30660\u306e\u5e72\u6e09\u3092\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3059\u308b\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\uff1f\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3002\u5b9f\u8df5\u7684\u306a\u4f8b\u3068\u30b3\u30fc\u30c9\u3001\u6ce8\u610f\u70b9\u3092\u542b\u3081\u3066\u521d\u5fc3\u8005\u306b\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u8aac\u660e\u3057\u307e\u3059\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/php\u3067empty\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u30010\u306e\u5e72\u6e09\u3092\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3059\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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