{"id":22563,"date":"2024-11-21T10:50:16","date_gmt":"2024-11-21T02:50:16","guid":{"rendered":"https:\/\/fwq.ai\/blog\/22563\/"},"modified":"2024-11-21T10:50:16","modified_gmt":"2024-11-21T02:50:16","slug":"laravel%e6%80%8e%e4%b9%88%e5%88%a4%e6%96%ad%e7%a9%ba%e5%80%bc","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/22563\/","title":{"rendered":"laravel\u600e\u4e48\u5224\u65ad\u7a7a\u503c"},"content":{"rendered":"

\u5728laravel\u5f00\u53d1\u4e2d\uff0c\u6211\u4eec\u7ecf\u5e38\u9700\u8981\u5224\u65ad\u67d0\u4e2a\u53d8\u91cf\u662f\u5426\u4e3a\u7a7a\u3002\u5728php\u4e2d\uff0c\u6211\u4eec\u901a\u5e38\u4f7f\u7528empty()\u548cisset()\u51fd\u6570\u6765\u5224\u65ad\u662f\u5426\u4e3a\u7a7a\uff0c\u4f46\u5728laravel\u4e2d\uff0c\u6709\u66f4\u65b9\u4fbf\u7684\u65b9\u6cd5\u6765\u5904\u7406\u7a7a\u503c\u5224\u65ad\u3002\u4e0b\u9762\u5c06\u4ecb\u7ecd\u4e00\u4e9blaravel\u5224\u65ad\u7a7a\u503c\u7684\u5e38\u7528\u65b9\u6cd5\u3002<\/p>\n

    \n
  1. \u4f7f\u7528null<\/li>\n<\/ol>\n

    \u5728Laravel\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528null\u6765\u8868\u793a\u4e00\u4e2a\u53d8\u91cf\u4e3a\u7a7a\u3002\u5982\u679c\u53d8\u91cf\u7684\u503c\u4e3anull\uff0c\u8bf4\u660e\u5b83\u6ca1\u6709\u88ab\u8d4b\u503c\u6216\u8005\u88ab\u663e\u5f0f\u5730\u8d4b\u503c\u4e3anull\u3002<\/p>\n

    \u4f8b\u5982\uff0c\u5982\u679c\u8981\u5224\u65ad\u4e00\u4e2a\u53d8\u91cf\u662f\u5426\u4e3a\u7a7a\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n

    if ($variable === null) {\n    \/\/ \u53d8\u91cf\u4e3a\u7a7a\n}<\/pre>\n
      \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
      \n
    1. \u4f7f\u7528empty()<\/li>\n<\/ol>\n
      \u867d\u7136\u5728PHP\u4e2dempty()\u51fd\u6570\u7684\u8868\u73b0\u5e76\u4e0d\u7a33\u5b9a\uff0c\u4f46\u5728Laravel\u4e2d\u5b83\u88ab\u91cd\u65b0\u5b9a\u4e49\u4e3a\u4e00\u4e2a\u66f4\u5b89\u5168\u3001\u66f4\u53ef\u9760\u7684\u51fd\u6570\u3002empty()\u51fd\u6570\u53ef\u4ee5\u7528\u6765\u5224\u65ad\u53d8\u91cf\u662f\u5426\u4e3a\u7a7a\u3002<\/p>\n
      \u4f8b\u5982\uff0c\u5047\u8bbe\u4f60\u60f3\u5224\u65ad\u4e00\u4e2a\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u7a7a\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n
      if (empty($string)) {\n    \/\/ \u5b57\u7b26\u4e32\u4e3a\u7a7a\n}<\/pre>\n
        \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
      empty()\u51fd\u6570\u4e0d\u4ec5\u53ef\u4ee5\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u7a7a\uff0c\u8fd8\u53ef\u4ee5\u5224\u65ad\u5176\u4ed6\u7c7b\u578b\u7684\u53d8\u91cf\u3002<\/p>\n
        \n
      1. \u4f7f\u7528is_null()<\/li>\n<\/ol>\n
        is_null()\u51fd\u6570\u662f\u4e00\u4e2aPHP\u51fd\u6570\uff0c\u4f46\u5728Laravel\u4e2d\u4e5f\u53ef\u4ee5\u4f7f\u7528\u3002\u8be5\u51fd\u6570\u7528\u4e8e\u5224\u65ad\u4e00\u4e2a\u53d8\u91cf\u662f\u5426\u4e3anull\u3002<\/p>\n
        \u4f8b\u5982\uff0c\u5982\u679c\u8981\u5224\u65ad\u4e00\u4e2a\u53d8\u91cf\u662f\u5426\u4e3anull\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n
        if (is_null($variable)) {\n    \/\/ \u53d8\u91cf\u4e3a\u7a7a\n}<\/pre>\n
          \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
          \n
        1. \u4f7f\u7528$variable<\/li>\n<\/ol>\n
          \u5728Laravel\u4e2d\uff0c\u76f4\u63a5\u4f7f\u7528\u53d8\u91cf\u540d\u53ef\u4ee5\u5224\u65ad\u53d8\u91cf\u662f\u5426\u4e3a\u7a7a\u3002\u5982\u679c\u4e00\u4e2a\u53d8\u91cf\u4e0d\u5b58\u5728\u6216\u8005\u88ab\u8d4b\u503c\u4e3anull\uff0c\u8fd9\u4e2a\u53d8\u91cf\u4f1a\u88ab\u8ba4\u4e3a\u662f\u7a7a\u7684\u3002<\/p>\n
          \u4f8b\u5982\uff0c\u5982\u679c\u8981\u5224\u65ad\u4e00\u4e2a\u53d8\u91cf\u662f\u5426\u4e3a\u7a7a\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n
          if (!$variable) {\n    \/\/ \u53d8\u91cf\u4e3a\u7a7a\n}<\/pre>\n
            \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
          \u6ce8\u610f\uff0c\u8fd9\u79cd\u65b9\u6cd5\u53ea\u9002\u7528\u4e8e\u5224\u65ad\u53d8\u91cf\u662f\u5426\u4e3a\u7a7a\uff0c\u4e0d\u80fd\u7528\u4e8e\u5224\u65ad\u53d8\u91cf\u662f\u5426\u5b58\u5728\u3002<\/p>\n
            \n
          1. \u4f7f\u7528is_null()\u548cempty()<\/li>\n<\/ol>\n
            \u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u901a\u8fc7\u7ec4\u5408\u4f7f\u7528is_null()\u548cempty()\u51fd\u6570\u53ef\u4ee5\u66f4\u51c6\u786e\u5730\u5224\u65ad\u53d8\u91cf\u662f\u5426\u4e3a\u7a7a\u3002\u4f8b\u5982\uff0c\u5982\u679c\u8981\u5224\u65ad\u4e00\u4e2a\u6570\u7ec4\u662f\u5426\u4e3a\u7a7a\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n
            if (is_null($array) || empty($array)) {\n    \/\/ \u6570\u7ec4\u4e3a\u7a7a\n}<\/pre>\n
              \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
            \u8fd9\u79cd\u65b9\u6cd5\u53ef\u4ee5\u907f\u514d\u7a7a\u6570\u7ec4\u548cnull\u6570\u7ec4\u4e4b\u95f4\u7684\u6df7\u6dc6\u3002<\/p>\n
            \u603b\u7ed3<\/p>\n
            \u4ee5\u4e0a\u662fLaravel\u4e2d\u7684\u4e00\u4e9b\u5e38\u7528\u65b9\u6cd5\u6765\u5224\u65ad\u7a7a\u503c\u3002\u867d\u7136\u5728PHP\u4e2d\u4e5f\u6709\u7c7b\u4f3c\u7684\u51fd\u6570\uff0c\u4f46\u662f\u5728Laravel\u4e2d\uff0c\u8fd9\u4e9b\u51fd\u6570\u88ab\u91cd\u65b0\u5b9a\u4e49\u548c\u4f18\u5316\uff0c\u4f7f\u5f97\u5224\u65ad\u66f4\u52a0\u65b9\u4fbf\u3001\u5b89\u5168\u3001\u53ef\u9760\u3002\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\uff0c\u4e0d\u7ba1\u4ec0\u4e48\u60c5\u51b5\uff0c\u6211\u4eec\u90fd\u8981\u517b\u6210\u5224\u65ad\u53d8\u91cf\u662f\u5426\u4e3a\u7a7a\u7684\u597d\u4e60\u60ef\u3002\u53ea\u6709\u8fd9\u6837\uff0c\u6211\u4eec\u7684\u7a0b\u5e8f\u624d\u80fd\u66f4\u52a0\u5065\u58ee\u3001\u7a33\u5b9a\u3002<\/p>\n
            \u4ee5\u4e0a\u5c31\u662flaravel\u600e\u4e48\u5224\u65ad\u7a7a\u503c\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
            \u5728laravel\u5f00\u53d1\u4e2d\uff0c\u6211\u4eec\u7ecf\u5e38\u9700\u8981\u5224\u65ad\u67d0\u4e2a\u53d8\u91cf\u662f\u5426\u4e3a\u7a7a\u3002\u5728php\u4e2d\uff0c\u6211\u4eec\u901a\u5e38\u4f7f\u7528empty()\u548cisset()\u51fd\u6570\u6765\u5224\u65ad\u662f\u5426\u4e3a\u7a7a\uff0c\u4f46\u5728laravel\u4e2d\uff0c\u6709\u66f4\u65b9\u4fbf\u7684\u65b9\u6cd5\u6765\u5904\u7406\u7a7a\u503c\u5224\u65ad\u3002\u4e0b\u9762\u5c06\u4ecb\u7ecd\u4e00\u4e9blaravel\u5224\u65ad\u7a7a\u503c\u7684\u5e38\u7528\u65b9\u6cd5\u3002 \u4f7f\u7528null \u5728Laravel\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528null\u6765\u8868\u793a\u4e00\u4e2a\u53d8\u91cf\u4e3a\u7a7a\u3002\u5982\u679c\u53d8\u91cf\u7684\u503c\u4e3anull\uff0c\u8bf4\u660e\u5b83\u6ca1\u6709\u88ab\u8d4b\u503c\u6216\u8005\u88ab\u663e\u5f0f\u5730\u8d4b\u503c\u4e3anull\u3002 \u4f8b\u5982\uff0c\u5982\u679c\u8981\u5224\u65ad\u4e00\u4e2a\u53d8\u91cf\u662f\u5426\u4e3a\u7a7a\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a if ($variable === null) { \/\/ \u53d8\u91cf\u4e3a\u7a7a } \u767b\u5f55\u540e\u590d\u5236 \u4f7f\u7528empty() \u867d\u7136\u5728PHP\u4e2dempty()\u51fd\u6570\u7684\u8868\u73b0\u5e76\u4e0d\u7a33\u5b9a\uff0c\u4f46\u5728Laravel\u4e2d\u5b83\u88ab\u91cd\u65b0\u5b9a\u4e49\u4e3a\u4e00\u4e2a\u66f4\u5b89\u5168\u3001\u66f4\u53ef\u9760\u7684\u51fd\u6570\u3002empty()\u51fd\u6570\u53ef\u4ee5\u7528\u6765\u5224\u65ad\u53d8\u91cf\u662f\u5426\u4e3a\u7a7a\u3002 \u4f8b\u5982\uff0c\u5047\u8bbe\u4f60\u60f3\u5224\u65ad\u4e00\u4e2a\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u7a7a\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a if (empty($string)) { \/\/ \u5b57\u7b26\u4e32\u4e3a\u7a7a } \u767b\u5f55\u540e\u590d\u5236 empty()\u51fd\u6570\u4e0d\u4ec5\u53ef\u4ee5\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u7a7a\uff0c\u8fd8\u53ef\u4ee5\u5224\u65ad\u5176\u4ed6\u7c7b\u578b\u7684\u53d8\u91cf\u3002 \u4f7f\u7528is_null() is_null()\u51fd\u6570\u662f\u4e00\u4e2aPHP\u51fd\u6570\uff0c\u4f46\u5728Laravel\u4e2d\u4e5f\u53ef\u4ee5\u4f7f\u7528\u3002\u8be5\u51fd\u6570\u7528\u4e8e\u5224\u65ad\u4e00\u4e2a\u53d8\u91cf\u662f\u5426\u4e3anull\u3002 \u4f8b\u5982\uff0c\u5982\u679c\u8981\u5224\u65ad\u4e00\u4e2a\u53d8\u91cf\u662f\u5426\u4e3anull\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a if (is_null($variable)) { \/\/ \u53d8\u91cf\u4e3a\u7a7a } \u767b\u5f55\u540e\u590d\u5236 \u4f7f\u7528$variable \u5728Laravel\u4e2d\uff0c\u76f4\u63a5\u4f7f\u7528\u53d8\u91cf\u540d\u53ef\u4ee5\u5224\u65ad\u53d8\u91cf\u662f\u5426\u4e3a\u7a7a\u3002\u5982\u679c\u4e00\u4e2a\u53d8\u91cf\u4e0d\u5b58\u5728\u6216\u8005\u88ab\u8d4b\u503c\u4e3anull\uff0c\u8fd9\u4e2a\u53d8\u91cf\u4f1a\u88ab\u8ba4\u4e3a\u662f\u7a7a\u7684\u3002 \u4f8b\u5982\uff0c\u5982\u679c\u8981\u5224\u65ad\u4e00\u4e2a\u53d8\u91cf\u662f\u5426\u4e3a\u7a7a\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a if (!$variable) { \/\/ \u53d8\u91cf\u4e3a\u7a7a } \u767b\u5f55\u540e\u590d\u5236 \u6ce8\u610f\uff0c\u8fd9\u79cd\u65b9\u6cd5\u53ea\u9002\u7528\u4e8e\u5224\u65ad\u53d8\u91cf\u662f\u5426\u4e3a\u7a7a\uff0c\u4e0d\u80fd\u7528\u4e8e\u5224\u65ad\u53d8\u91cf\u662f\u5426\u5b58\u5728\u3002 \u4f7f\u7528is_null()\u548cempty() \u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u901a\u8fc7\u7ec4\u5408\u4f7f\u7528is_null()\u548cempty()\u51fd\u6570\u53ef\u4ee5\u66f4\u51c6\u786e\u5730\u5224\u65ad\u53d8\u91cf\u662f\u5426\u4e3a\u7a7a\u3002\u4f8b\u5982\uff0c\u5982\u679c\u8981\u5224\u65ad\u4e00\u4e2a\u6570\u7ec4\u662f\u5426\u4e3a\u7a7a\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a if (is_null($array) || empty($array)) { \/\/ \u6570\u7ec4\u4e3a\u7a7a } […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-22563","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/22563","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=22563"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/22563\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=22563"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=22563"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=22563"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}