{"id":30173,"date":"2023-12-16T16:10:28","date_gmt":"2023-06-02T23:03:07","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%85%b3%e4%ba%8ephp%e5%87%bd%e6%95%b0\/"},"modified":"2025-08-12T17:55:26","modified_gmt":"2025-08-12T09:55:26","slug":"%e5%85%b3%e4%ba%8ephp%e5%87%bd%e6%95%b0","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%85%b3%e4%ba%8ephp%e5%87%bd%e6%95%b0\/","title":{"rendered":"\u5173\u4e8ePHP\u51fd\u6570"},"content":{"rendered":"

\u9996\u5148\u6211\u662f\u65e5\u672c\u7cfb\u7edf\u5f00\u53d1\u682a\u5f0f\u4f1a\u793e\u7684\u85e4\u4e95\u5148\u751f\u3002
\n\u8fd9\u6b21\u6211\u603b\u7ed3\u4e86\u5173\u4e8ePHP\u51fd\u6570\u7684\u7c7b\u578b\u58f0\u660e\u548c\u53c2\u6570\u7684\u6982\u8981\u3002<\/p>\n

\u58f0\u660e\u7c7b\u578b<\/p>\n

\u7b80\u8ff0\u5728\u51fd\u6570\u7684\u53c2\u6570\u548c\u8fd4\u56de\u503c\u4e0a\uff0c\u53ef\u4ee5\u58f0\u660e\u7c7b\u578b\u3002
\n\u901a\u8fc7\u8fd9\u6837\u505a\uff0c\u53ef\u4ee5\u786e\u4fdd\u53c2\u6570\u662f\u58f0\u660e\u7684\u7c7b\u578b\u3002
\n\u53ef\u7528\u4e8e\u7c7b\u578b\u58f0\u660e\u7684\u7c7b\u578b\u5217\u8868\u3002<\/p>\n
<?php<\/span>\r\nfunction<\/span> sum<\/span>(<\/span>int<\/span> $a<\/span>,<\/span> int<\/span> $b<\/span>):<\/span> int<\/span>\r\n{<\/span>\r\n    return<\/span> $a<\/span> +<\/span> $b<\/span>;<\/span>\r\n}<\/span>\r\necho<\/span> sum<\/span>(<\/span>1<\/span>,<\/span> 2<\/span>)<\/span> .<\/span> PHP_EOL<\/span>;<\/span> \/\/ 3<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
\u5141\u8bb8\u7a7a\u503c\u7684\u7c7b\u578b\u58f0\u660e\uff08PHP7.1.0\uff09\u5728\u7c7b\u578b\u58f0\u660e\u524d\u52a0\u4e0a\u95ee\u53f7\uff08?\uff09\uff0c\u53ef\u4ee5\u5141\u8bb8NULL\u7684\u7c7b\u578b\u58f0\u660e\u3002\u8fd9\u6837\u4e00\u6765\uff0c\u53c2\u6570\u5c31\u53ef\u4ee5\u63a5\u53d7NULL\u3002<\/p>\n
<?php<\/span>\r\nfunction<\/span> sum<\/span>(<\/span>int<\/span> $a<\/span>,<\/span> ?int<\/span> $b<\/span>):<\/span> int<\/span>\r\n{<\/span>\r\n    $b<\/span> =<\/span> $b<\/span> ??<\/span> 10<\/span>;<\/span>\r\n    return<\/span> $a<\/span> +<\/span> $b<\/span>;<\/span>\r\n}<\/span>\r\necho<\/span> sum<\/span>(<\/span>1<\/span>,<\/span> 2<\/span>)<\/span> .<\/span> PHP_EOL<\/span>;<\/span>    \/\/ 3<\/span>\r\necho<\/span> sum<\/span>(<\/span>1<\/span>,<\/span> null<\/span>)<\/span> .<\/span> PHP_EOL<\/span>;<\/span> \/\/ 11<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
\u7efc\u5408\u578b(PHP8.0.0)\u53ef\u4ee5\u901a\u8fc7\u7ec4\u5408\u5355\u4e00\u7c7b\u578b\u6765\u521b\u5efa\u590d\u5408\u7c7b\u578b\u3002\u4ee5\u4e0b\u6709\u4e24\u79cd\u590d\u5408\u7c7b\u578b\u3002<\/p>\n
    \n
  • \n
      \u5358\u4e00\u306e\u578b\u306e\u96c6\u5408\u3092\u8868\u3059union\u578b(PHP8.0.0)<\/ul>\n<\/li>\n<\/ul>\n
       <\/p>\n
        \u30af\u30e9\u30b9\/\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306e\u4ea4\u5dee\u578b(PHP8.1.0)<\/ul>\n
        PHP8.0.0\u5f15\u5165\u4e86union\u7c7b\u578b\u5982\u679c\u5c06\u7c7b\u578b\u58f0\u660e\u4e3aunion\uff0c\u53ef\u4ee5\u63a5\u53d7\u591a\u4e2a\u4e0d\u540c\u7684\u7c7b\u578b\u3002
        \nunion\u7684\u58f0\u660e\u65b9\u6cd5\u662fT1|T2…\u3002<\/p>\n
        <?php<\/span>\r\nfunction<\/span> sum<\/span>(<\/span>int<\/span> $a<\/span>,<\/span> int<\/span>|<\/span>string<\/span> $b<\/span>):<\/span> int<\/span>\r\n{<\/span>\r\n    return<\/span> $a<\/span> +<\/span> $b<\/span>;<\/span>\r\n}<\/span>\r\necho<\/span> sum<\/span>(<\/span>1<\/span>,<\/span> 2<\/span>)<\/span> .<\/span> PHP_EOL<\/span>;<\/span>   \/\/ 3<\/span>\r\necho<\/span> sum<\/span>(<\/span>1<\/span>,<\/span> \"2\"<\/span>)<\/span> .<\/span> PHP_EOL<\/span>;<\/span> \/\/ 3<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
        PHP8.1.0 \u7684\u4e00\u79cd\u7279\u6027\u662f\u4ea4\u53c9\u7f16\u8bd1\u6a21\u5f0f\u3002
        \n\u5f53\u5c06\u4e00\u4e2a\u7c7b\u578b\u58f0\u660e\u4e3a\u4ea4\u53c9\u7c7b\u578b\u65f6\uff0c\u5b83\u5c06\u63a5\u53d7\u7b26\u5408\u4f5c\u4e3a\u7c7b\/\u63a5\u53e3\u58f0\u660e\u7684\u7c7b\u578b\u7684\u6240\u6709\u503c\u3002<\/p>\n
        <?php<\/span>\r\ninterface<\/span> I<\/span> {<\/span> public<\/span> function<\/span> sum<\/span>(<\/span>int<\/span> $a<\/span>,<\/span> int<\/span> $b<\/span>):<\/span> int<\/span>;<\/span> };<\/span>\r\nclass<\/span> A<\/span> {};<\/span>\r\nclass<\/span> B<\/span> extends<\/span> A<\/span> implements<\/span> I<\/span> {<\/span>\r\n    function<\/span> sum<\/span>(<\/span>int<\/span> $a<\/span>,<\/span> int<\/span> $b<\/span>):<\/span> int<\/span>\r\n    {<\/span>\r\n        return<\/span> $a<\/span> +<\/span> $b<\/span>;<\/span>\r\n    }<\/span>\r\n};<\/span>\r\n\r\nfunction<\/span> callSum<\/span>(<\/span>I<\/span>&<\/span>A<\/span> $b<\/span>):<\/span> int<\/span>\r\n{<\/span>\r\n    return<\/span> $b<\/span>-><\/span>sum<\/span>(<\/span>1<\/span>,<\/span> 2<\/span>);<\/span>\r\n}<\/span>\r\necho<\/span> callSum<\/span>(<\/span>new<\/span> B<\/span>())<\/span> .<\/span> PHP_EOL<\/span>;<\/span> \/\/ 3<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
        \u4ec5\u4f7f\u7528\u8fd4\u56de\u503c\u6765\u8868\u793a\u6709\u6548\u7c7b\u578b<\/p>\n
        \u4ee5\u4e0b\u662f\u5bf9”void”\u7684\u4e2d\u6587\u7ffb\u8bd1\u53ca\u91ca\u4e49\uff1a- \u7a7a\u767d – \u8868\u793a\u6ca1\u6709\u8fd4\u56de\u503c\u6216\u4e0d\u8fd4\u56de\u4efb\u4f55\u503c\u7684\u60c5\u51b5\uff0c\u5e38\u7528\u4e8e\u7f16\u7a0b\u4e2d\u3002<\/p>\n
        \u8bf7\u6ce8\u610f\uff0c\u4ee5\u4e0a\u6240\u63d0\u4f9b\u7684\u7b54\u6848\u662f\u4eba\u5de5\u7ffb\u8bd1\uff0c\u5e76\u4e0d\u5177\u6709\u7edf\u8ba1\u6570\u636e\u652f\u6301\u3002<\/p>\n
        \u8fd9\u662f\u8868\u793a\u51fd\u6570\u4e0d\u8fd4\u56de\u4efb\u4f55\u503c\u7684\u8fd4\u56de\u503c\u7c7b\u578b\u3002<\/p>\n
        <?php<\/span>\r\nfunction<\/span> display<\/span>(<\/span>string<\/span> $str<\/span>):<\/span> void<\/span>\r\n{<\/span>\r\n    echo<\/span> $str<\/span> .<\/span> PHP_EOL<\/span>;<\/span>\r\n}<\/span>\r\ndisplay<\/span>(<\/span>\"Hello World\"<\/span>);<\/span> \/\/ Hello World<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
        \u4ece\u672a\uff08PHP8.1.0\uff09\u8fd9\u4e2a\u8fd4\u56de\u503c\u7c7b\u578b\u8868\u793a\u51fd\u6570\u4e0d\u4f1a\u8fd4\u56de\u3002
        \n\u5b83\u8868\u660e\u5728\u51fd\u6570\u4e2d\u8c03\u7528exit()\u3001\u629b\u51fa\u5f02\u5e38\u6216\u8fdb\u5165\u65e0\u9650\u5faa\u73af\u4e2d\u7684\u4efb\u4e00\u60c5\u51b5\u3002<\/p>\n
        \u9759\u6001\u7684\uff08PHP8.0.0\uff09\u8fd4\u56de\u503c\u7684\u7c7b\u578b\u8868\u793a\u4e3a\u8c03\u7528\u65b9\u6cd5\u7684\u7c7b\u7684\u5b9e\u4f8b\u3002<\/p>\n
        \u4e25\u683c\u7684\u7c7b\u578b\u68c0\u67e5\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5728\u671f\u671b\u4e00\u4e2a\u6807\u91cf\u7c7b\u578b\u58f0\u660e\u4e2d\uff0c\u5982\u679c\u53ef\u4ee5\u5c06\u9519\u8bef\u7c7b\u578b\u7684\u503c\u8fdb\u884c\u8f6c\u6362\uff0c\u90a3\u4e48\u4f1a\u53d1\u751f\u9690\u5f0f\u8f6c\u6362\uff08\u5f3a\u5236\u6a21\u5f0f\uff09\u3002
        \n\u53ef\u4ee5\u4e3a\u6bcf\u4e2a\u6587\u4ef6\u542f\u7528\u4e25\u683c\u7c7b\u578b\u68c0\u67e5\uff08\u4e25\u683c\u6a21\u5f0f\uff09\u3002\u5728\u4e25\u683c\u6a21\u5f0f\u4e0b\uff0c\u53ea\u63a5\u53d7\u4e0e\u7c7b\u578b\u58f0\u660e\u5bf9\u5e94\u7684\u503c\uff0c\u5426\u5219\u4f1a\u629b\u51faTypeError\u3002<\/p>\n
        \u4e3a\u4e86\u542f\u7528\u4e25\u683c\u7c7b\u578b\u68c0\u67e5\uff0c\u5728\u4ee3\u7801\u4e2d\u9700\u8981\u5199\u4e0a`declare(strict_types=1);`\u3002<\/p>\n
        \u4e25\u683c\u7c7b\u578b\u5316\u9002\u7528\u4e8e\u5728\u542f\u7528\u4e86strict\u6a21\u5f0f\u7684\u6587\u4ef6\u5185\u90e8\u8fdb\u884c\u7684\u51fd\u6570\u8c03\u7528\u3002\u5b83\u4e0d\u9002\u7528\u4e8e\u5bf9\u8be5\u6587\u4ef6\u4e2d\u58f0\u660e\u7684\u51fd\u6570\u7684\u8c03\u7528\u3002
        \n\u5982\u679c\u5728\u7981\u7528\u4e25\u683c\u7c7b\u578b\u5316\u7684\u6587\u4ef6\u4e2d\u8c03\u7528\u542f\u7528\u4e86\u4e25\u683c\u7c7b\u578b\u5316\u7684\u6587\u4ef6\u7684\u51fd\u6570\uff0c\u5219\u8c03\u7528\u65b9\u7684\u6a21\u5f0f\uff08coercive\u6a21\u5f0f\uff09\u5c06\u88ab\u4f7f\u7528\uff0c\u503c\u5c06\u88ab\u9690\u5f0f\u8f6c\u6362\u3002<\/p>\n
        \u8054\u5408\u7c7b\u578b\u4e0e\u81ea\u52a8\u8f6c\u6362\uff08PHP8.0.0\uff09\u5982\u679c\u4e25\u683c\u7684\u7c7b\u578b\u68c0\u67e5\u65e0\u6548\u7684\u8bdd\u5c31\u4f1a\u88ab\u5e94\u7528\u3002\u5982\u679c\u6307\u5b9a\u7684\u503c\u7684\u7c7b\u578b\u4e0d\u5305\u62ec\u5728\u8054\u5408\u5185\uff0c\u90a3\u4e48\u7c7b\u578b\u8f6c\u6362\u5c06\u6309\u4ee5\u4e0b\u987a\u5e8f\u4ece\u8054\u5408\u5185\u786e\u5b9a\u3002<\/p>\n
          \n
        1. \n
            \u6574\u6570<\/ol>\n<\/li>\n<\/ol>\n
             <\/p>\n
              \n
            1. \n
                \u6d6e\u70b9\u6570<\/ol>\n<\/li>\n<\/ol>\n
                 <\/p>\n
                  \n
                1. \n
                    \u5b57\u7b26\u4e32<\/ol>\n<\/li>\n<\/ol>\n
                     <\/p>\n
                      \u5e03\u5c14\u503c<\/ol>\n
                      \u578b\u5ba3\u8a00\u304c int|string\r\n\r\n\u5024\u306e\u578b\u304cunion\u306b\u542b\u307e\u308c\u3066\u3044\u308b\r\n\u5024:42   \u30d1\u30e9\u30e1\u30fc\u30bf:42   \/\/ \u81ea\u52d5\u5909\u63db\u3055\u308c\u306a\u3044\r\n\u5024:\"42\" \u30d1\u30e9\u30e1\u30fc\u30bf:\"42\" \/\/ \u81ea\u52d5\u5909\u63db\u3055\u308c\u306a\u3044\r\n\r\n\u5024\u306e\u578b\u304cunion\u306b\u542b\u307e\u308c\u3066\u3044\u306a\u3044\r\n\u5024:42.5         \u30d1\u30e9\u30e1\u30fc\u30bf:42   \/\/ float\u306fint\u306b\u5909\u63db\u3067\u304d\u308b\u305f\u3081int\u306b\u81ea\u52d5\u5909\u63db\r\n\u5024:new Object() \u30d1\u30e9\u30e1\u30fc\u30bf:__toString()\u306e\u623b\u308a\u5024 \/\/ int\u306b\u5909\u63db\u3067\u304d\u306a\u3044\u305f\u3081string\u306b\u81ea\u52d5\u5909\u63db\r\n\u5024:[]           \u30d1\u30e9\u30e1\u30fc\u30bf:TypeError\u304c\u30b9\u30ed\u30fc    \/\/ int\u3001string\u306b\u5909\u63db\u3067\u304d\u306a\u3044\u305f\u3081TypeError\u304c\u30b9\u30ed\u30fc\r\n<\/code><\/pre>\n
                      \u5728\u6307\u5b9a\u503c\u662f\u4e00\u4e2a\u5305\u542bint\u548cfloat\u7684\u6570\u5b57\u683c\u5f0f\u5b57\u7b26\u4e32\u7684\u65f6\u5019\uff0c\u6839\u636e\u5b57\u7b26\u4e32\u662fint\u683c\u5f0f\u8fd8\u662ffloat\u683c\u5f0f\u6765\u81ea\u52a8\u8f6c\u6362\u4e3a\u76f8\u5e94\u7684\u7c7b\u578b\u3002\u901a\u8fc7\u4f8b\u5916\u7684\u65b9\u5f0f\uff0c\u65e0\u8bba\u5b57\u7b26\u4e32\u7684\u987a\u5e8f\u5982\u4f55\uff0c\u6570\u503c\u683c\u5f0f\u7684\u5b57\u7b26\u4e32\u90fd\u4f1a\u81ea\u52a8\u8f6c\u6362\u4e3aint\u6216\u8005float\u3002<\/p>\n
                      \u578b\u5ba3\u8a00\u304c int|float\r\n\u5024:\"45\"   \u30d1\u30e9\u30e1\u30fc\u30bf:45   \/\/ \u6587\u5b57\u5217\u304cint\u5f62\u5f0f\u306e\u305f\u3081int\u306b\u81ea\u52d5\u5909\u63db\r\n\u5024:\"45.5\" \u30d1\u30e9\u30e1\u30fc\u30bf:45.5 \/\/ \u6587\u5b57\u5217\u304cfloat\u5f62\u5f0f\u306e\u305f\u3081float\u306b\u81ea\u52d5\u5909\u63db\r\n<\/code><\/pre>\n
                      \u51fd\u6570\u7684\u53c2\u6570<\/p>\n
                      \u4f20\u9012\u503c
                      \n\u5f53\u5c06\u503c\u4f20\u9012\u7ed9\u51fd\u6570\u65f6\uff0c\u9ed8\u8ba4\u4f7f\u7528\u6309\u503c\u4f20\u9012\u3002\u5373\u4f7f\u5728\u51fd\u6570\u5185\u90e8\u66f4\u6539\u53c2\u6570\u7684\u503c\uff0c\u51fd\u6570\u5916\u90e8\u7684\u503c\u4e5f\u4e0d\u4f1a\u6539\u53d8\u3002<\/p>\n
                      <?php<\/span>\r\nfunction<\/span> addString<\/span>(<\/span>string<\/span> $str<\/span>):<\/span> void<\/span>\r\n{<\/span>\r\n    $str<\/span> .<\/span>=<\/span> \" World\"<\/span>;<\/span>\r\n}<\/span>\r\n$str<\/span> =<\/span> \"Hello\"<\/span>;<\/span>\r\naddString<\/span>(<\/span>$str<\/span>);<\/span>\r\n\r\necho<\/span> $str<\/span> .<\/span> PHP_EOL<\/span>;<\/span> \/\/ Hello<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
                      \u53c2\u8003\u4f20\u9012\u5982\u679c\u60f3\u8981\u5728\u51fd\u6570\u5185\u90e8\u66f4\u6539\u53c2\u6570\u7684\u503c\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u5f0f\u3002
                      \n\u5728\u51fd\u6570\u7684\u53c2\u6570\u540d\u79f0\u524d\u52a0\u4e0a&\u7b26\u53f7\uff0c\u5373\u53ef\u5b9e\u73b0\u5f15\u7528\u4f20\u9012\u3002<\/p>\n
                      <?php<\/span>\r\nfunction<\/span> addString<\/span>(<\/span>string<\/span> &<\/span>$str<\/span>):<\/span> void<\/span>\r\n{<\/span>\r\n    $str<\/span> .<\/span>=<\/span> \" World\"<\/span>;<\/span>\r\n}<\/span>\r\n$str<\/span> =<\/span> \"Hello\"<\/span>;<\/span>\r\naddString<\/span>(<\/span>$str<\/span>);<\/span>\r\n\r\necho<\/span> $str<\/span> .<\/span> PHP_EOL<\/span>;<\/span> \/\/ Hello World<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
                      \u9ed8\u8ba4\u53c2\u6570\u5728\u53c2\u6570\u4e2d\u5b9a\u4e49\u9ed8\u8ba4\u503c\u3002\u5f53\u53c2\u6570\u672a\u6307\u5b9a\u65f6\uff0c\u5c06\u4f7f\u7528\u9ed8\u8ba4\u503c\uff08\u4f8b\u5982\u7528\u4e8e\u53ef\u9009\u53c2\u6570\u7b49\uff09\u3002
                      \n\u5982\u679c\u5c06\u53c2\u6570\u8bbe\u7f6e\u4e3aNULL\uff0c\u5219\u4e0d\u4f1a\u5206\u914d\u9ed8\u8ba4\u503c\u3002<\/p>\n
                      <?php<\/span>\r\nfunction<\/span> display<\/span>(<\/span>?string<\/span> $str<\/span> =<\/span> \"Hello World\"<\/span>):<\/span> void<\/span>\r\n{<\/span>\r\n    echo<\/span> $str<\/span> .<\/span> PHP_EOL<\/span>;<\/span>\r\n}<\/span>\r\ndisplay<\/span>();<\/span>        \/\/ Hello World<\/span>\r\ndisplay<\/span>(<\/span>\"hello\"<\/span>);<\/span> \/\/ hello<\/span>\r\ndisplay<\/span>(<\/span>null<\/span>);<\/span>    \/\/ \"\"<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
                      \u53ef\u53d8\u957f\u5ea6\u53c2\u6570
                      \n\u5728\u51fd\u6570\u5b9a\u4e49\u4e2d\u4f7f\u7528…\u4f1a\u63a5\u53d7\u53ef\u53d8\u957f\u5ea6\u7684\u53c2\u6570\u3002<\/p>\n
                      <?php<\/span>\r\nfunction<\/span> avg<\/span>(...<\/span>$nums<\/span>):<\/span> int<\/span>|<\/span>float<\/span>\r\n{<\/span>\r\n    $total<\/span> =<\/span> 0<\/span>;<\/span>\r\n    foreach<\/span>(<\/span>$nums<\/span> as<\/span> $num<\/span>)<\/span> {<\/span>\r\n        $total<\/span> +=<\/span> $num<\/span>;<\/span>\r\n    }<\/span>\r\n    return<\/span> $total<\/span> \/<\/span> count<\/span>(<\/span>$nums<\/span>);<\/span>\r\n}<\/span>\r\necho<\/span> avg<\/span>(<\/span>10<\/span>,<\/span> 11<\/span>,<\/span> 12<\/span>)<\/span> .<\/span> PHP_EOL<\/span>;<\/span> \/\/ 11<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
                      \u5728\u51fd\u6570\u8c03\u7528\u65f6\uff0c\u4f7f\u7528\u2026\u7b26\u53f7\u5728\u6570\u7ec4\u7b49\u5bf9\u8c61\u540e\u9762\uff0c\u53ef\u4ee5\u5c55\u5f00\u8be5\u6570\u7ec4\uff0c\u5e76\u5c06\u5176\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u3002<\/p>\n
                      <?php<\/span>\r\nfunction<\/span> multiDisplay<\/span>(<\/span>string<\/span> $str<\/span>,<\/span> int<\/span> $cnt<\/span>):<\/span> void<\/span>\r\n{<\/span>\r\n    for<\/span> (<\/span>$i<\/span> =<\/span> 0<\/span>;<\/span> $i<\/span><<\/span>$cnt<\/span>;<\/span> $i<\/span>++<\/span>)<\/span> {<\/span>\r\n        echo<\/span> $str<\/span> .<\/span> PHP_EOL<\/span>;<\/span>\r\n    }<\/span>\r\n}<\/span>\r\nmultiDisplay<\/span>(<\/span>...<\/span>[<\/span>\"Hello World\"<\/span>,<\/span> 3<\/span>]);<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
                      PHP8.0.0\u4e2d\u7684\u547d\u540d\u53c2\u6570\u5f15\u6570\u3092\u4f4d\u7f6e\u3067\u306f\u306a\u304f\u3001\u5f15\u6570\u540d\u3067\u6e21\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002
                      \n\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u5f15\u6570\u304c\u8907\u6570\u3042\u308b\u5834\u5408\u306b\u3001\u5909\u66f4\u3057\u305f\u3044\u5f15\u6570\u306e\u307f\u3092\u540d\u524d\u4ed8\u304d\u3067\u6307\u5b9a\u3067\u304d\u307e\u3059\u3002<\/p>\n
                      <?php<\/span>\r\n$jsonStr<\/span> =<\/span> '{ \"hoge\": \"hoge\" }'<\/span>;<\/span>\r\nvar_dump<\/span>(<\/span>json_decode<\/span>(<\/span>$jsonStr<\/span>,<\/span> flags<\/span>:<\/span> JSON_THROW_ON_ERROR<\/span>));<\/span>\r\nvar_dump<\/span>(<\/span>json_decode<\/span>(<\/span>$jsonStr<\/span>,<\/span> null<\/span>,<\/span> 512<\/span>,<\/span> JSON_THROW_ON_ERROR<\/span>));<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
                      \u6574\u7406<\/p>\n
                        \n
                      • \n
                          \u5f15\u6570\u3068\u623b\u308a\u5024\u306b\u578b\u5ba3\u8a00\u304c\u4f7f\u3048\u308b<\/ul>\n<\/li>\n<\/ul>\n
                           <\/p>\n
                            \n
                          • \n
                              \u578b\u5ba3\u8a00\u306e\u524d\u306b?\u3092\u4ed8\u3051\u308b\u3068nullable\u306b\u306a\u308b<\/ul>\n<\/li>\n<\/ul>\n
                              declare(strict_types=1);\u3092\u8a18\u8f09\u3057\u306a\u3044\u3068\u5024\u304c\u81ea\u52d5\u5909\u63db\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b
                              \n\u95a2\u6570\u306b\u306f\u5024\u6e21\u3057\u3001\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9\u6e21\u3057\u306e2\u3064\u306e\u6e21\u3057\u65b9\u304c\u3042\u308b
                              \n\u30c7\u30d5\u30a9\u30eb\u30c8\u5f15\u6570\u3001\u53ef\u5909\u9577\u5f15\u6570\u3001\u540d\u524d\u4ed8\u304d\u5f15\u6570(PHP8.0.0)\u306e\u6a5f\u80fd\u304c\u5229\u7528\u3067\u304d\u308b<\/p>\n","protected":false},"excerpt":{"rendered":"
                              \u9996\u5148\u6211\u662f\u65e5\u672c\u7cfb\u7edf\u5f00\u53d1\u682a\u5f0f\u4f1a\u793e\u7684\u85e4\u4e95\u5148\u751f\u3002 \u8fd9\u6b21\u6211\u603b\u7ed3\u4e86\u5173\u4e8ePHP\u51fd\u6570\u7684\u7c7b\u578b\u58f0\u660e\u548c\u53c2\u6570\u7684\u6982\u8981\u3002 \u58f0\u660e\u7c7b\u578b \u7b80\u8ff0\u5728 […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-30173","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"\n\u5173\u4e8ePHP\u51fd\u6570 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8e\u5173\u4e8ePHP\u51fd\u6570\u7684\u6280\u672f\u6587\u7ae0\" \/>\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\/zh\/blog\/\u5173\u4e8ephp\u51fd\u6570\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u5173\u4e8ePHP\u51fd\u6570\" \/>\n<meta property=\"og:description\" content=\"\u5173\u4e8e\u5173\u4e8ePHP\u51fd\u6570\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u5173\u4e8ephp\u51fd\u6570\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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