{"id":742,"date":"2025-01-04T21:59:04","date_gmt":"2025-01-04T13:59:04","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=742"},"modified":"2025-01-04T21:59:04","modified_gmt":"2025-01-04T13:59:04","slug":"%e5%9c%a8-php-%e4%b8%ad%ef%bc%8c%e6%80%8e%e6%a0%b7%e6%88%aa%e5%8f%96%e5%ad%97%e7%ac%a6%e4%b8%b2%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/01\/04\/%e5%9c%a8-php-%e4%b8%ad%ef%bc%8c%e6%80%8e%e6%a0%b7%e6%88%aa%e5%8f%96%e5%ad%97%e7%ac%a6%e4%b8%b2%ef%bc%9f\/","title":{"rendered":"\u5728 PHP \u4e2d\uff0c\u600e\u6837\u622a\u53d6\u5b57\u7b26\u4e32\uff1f"},"content":{"rendered":"\n
\n

\u5728 PHP \u4e2d\uff0c\u622a\u53d6\u5b57\u7b26\u4e32\u7684\u65b9\u6cd5\u6709\u5f88\u591a\uff0c\u4e0b\u9762\u662f\u4e00\u4e9b\u5e38\u89c1\u7684\u622a\u53d6\u5b57\u7b26\u4e32\u7684\u65b9\u6cd5\u53ca\u5176\u4f7f\u7528\u793a\u4f8b\uff1a<\/p>\n<\/blockquote>\n\n\n\n

\n\n\n\n

1. substr()<\/code><\/strong><\/h3>\n\n\n\n

substr()<\/code> \u51fd\u6570\u7528\u4e8e\u4ece\u5b57\u7b26\u4e32\u4e2d\u63d0\u53d6\u5b50\u5b57\u7b26\u4e32\u3002\u4f60\u53ef\u4ee5\u6307\u5b9a\u8d77\u59cb\u4f4d\u7f6e\u548c\u622a\u53d6\u7684\u957f\u5ea6\u3002<\/p>\n\n\n\n

\u8bed\u6cd5<\/strong>\uff1a<\/p>\n\n\n\n

   substr(string $string, int $start, int $length = ?): string<\/code><\/pre>\n\n\n\n
    \n
  • $start<\/code>\uff1a\u8d77\u59cb\u4f4d\u7f6e\uff08\u5982\u679c\u4e3a\u8d1f\u6570\uff0c\u5219\u4ece\u5b57\u7b26\u4e32\u7684\u672b\u5c3e\u5f00\u59cb\u8ba1\u6570\uff09\u3002<\/li>\n\n\n\n
  • $length<\/code>\uff1a\u53ef\u9009\uff0c\u622a\u53d6\u7684\u957f\u5ea6\uff08\u5982\u679c\u7701\u7565\uff0c\u5219\u622a\u53d6\u5230\u5b57\u7b26\u4e32\u7684\u672b\u5c3e\uff09\u3002 \u793a\u4f8b<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
       $str = \"Hello, World!\";\n   echo substr($str, 7);       \/\/ \u8f93\u51fa \"World!\"\n   echo substr($str, 0, 5);    \/\/ \u8f93\u51fa \"Hello\"\n   echo substr($str, -6, 5);   \/\/ \u8f93\u51fa \"World\"<\/code><\/pre>\n\n\n\n
    \n\n\n\n
    2. mb_substr()<\/code><\/strong> (\u591a\u5b57\u8282\u5b57\u7b26\u4e32\u5904\u7406)<\/h3>\n\n\n\n
    mb_substr()<\/code> \u662f substr()<\/code> \u7684\u591a\u5b57\u8282\u5b57\u7b26\u4e32\u7248\u672c\uff0c\u9002\u7528\u4e8e\u5904\u7406\u5982\u4e2d\u6587\u3001\u65e5\u6587\u7b49\u591a\u5b57\u8282\u5b57\u7b26\u96c6\u3002<\/p>\n\n\n\n
    \u8bed\u6cd5<\/strong>\uff1a<\/p>\n\n\n\n
       mb_substr(string $string, int $start, int $length = ? , string $encoding = \"UTF-8\"): string<\/code><\/pre>\n\n\n\n
      \n
    • $encoding<\/code>\uff1a\u6307\u5b9a\u5b57\u7b26\u7f16\u7801\uff0c\u9ed8\u8ba4\u662f \"UTF-8\"<\/code>\u3002 \u793a\u4f8b<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
         $str = \"\u4f60\u597d\uff0c\u4e16\u754c\uff01\";\n   echo mb_substr($str, 0, 2);  \/\/ \u8f93\u51fa \"\u4f60\u597d\"\n   echo mb_substr($str, 3, 2);  \/\/ \u8f93\u51fa \"\u4e16\u754c\"<\/code><\/pre>\n\n\n\n
      \n\n\n\n
      3. str_split()<\/code><\/strong><\/h3>\n\n\n\n
      str_split()<\/code> \u5c06\u5b57\u7b26\u4e32\u5206\u5272\u6210\u4e00\u4e2a\u6570\u7ec4\uff0c\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u662f\u4e00\u4e2a\u5b57\u7b26\u3002\u4f60\u53ef\u4ee5\u6307\u5b9a\u5206\u5272\u7684\u957f\u5ea6\u3002<\/p>\n\n\n\n
      \u8bed\u6cd5<\/strong>\uff1a<\/p>\n\n\n\n
         str_split(string $string, int $length = 1): array<\/code><\/pre>\n\n\n\n
        \n
      • $length<\/code>\uff1a\u6307\u5b9a\u6bcf\u4e2a\u5143\u7d20\u7684\u957f\u5ea6\uff0c\u9ed8\u8ba4\u4e3a 1\u3002 \u793a\u4f8b<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
           $str = \"Hello\";\n   $arr = str_split($str);\n   print_r($arr);    \/\/ \u8f93\u51fa\uff1aArray ( [0] => H [1] => e [2] => l [3] => l [4] => o )\n\n   $arr2 = str_split($str, 2);\n   print_r($arr2);   \/\/ \u8f93\u51fa\uff1aArray ( [0] => He [1] => ll [2] => o )<\/code><\/pre>\n\n\n\n
        \n\n\n\n
        4. explode()<\/code><\/strong><\/h3>\n\n\n\n
        explode()<\/code> \u6309\u7167\u6307\u5b9a\u7684\u5206\u9694\u7b26\u62c6\u5206\u5b57\u7b26\u4e32\uff0c\u8fd4\u56de\u4e00\u4e2a\u6570\u7ec4\u3002<\/p>\n\n\n\n
        \u8bed\u6cd5<\/strong>\uff1a<\/p>\n\n\n\n
           explode(string $delimiter, string $string, int $limit = ?): array<\/code><\/pre>\n\n\n\n
          \n
        • $delimiter<\/code>\uff1a\u5206\u9694\u7b26\u3002<\/li>\n\n\n\n
        • $string<\/code>\uff1a\u8981\u5206\u5272\u7684\u5b57\u7b26\u4e32\u3002<\/li>\n\n\n\n
        • $limit<\/code>\uff1a\u53ef\u9009\uff0c\u6307\u5b9a\u8fd4\u56de\u7684\u6570\u7ec4\u5143\u7d20\u4e2a\u6570\u3002 \u793a\u4f8b<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
             $str = \"apple,banana,cherry\";\n   $arr = explode(\",\", $str);\n   print_r($arr);  \/\/ \u8f93\u51fa\uff1aArray ( [0] => apple [1] => banana [2] => cherry )\n\n   $arr2 = explode(\",\", $str, 2);\n   print_r($arr2);  \/\/ \u8f93\u51fa\uff1aArray ( [0] => apple [1] => banana,cherry )<\/code><\/pre>\n\n\n\n
          \n\n\n\n
          5. substr_replace()<\/code><\/strong><\/h3>\n\n\n\n
          substr_replace()<\/code> \u7528\u4e8e\u66ff\u6362\u5b57\u7b26\u4e32\u4e2d\u7684\u67d0\u4e00\u90e8\u5206\uff0c\u8fd4\u56de\u4fee\u6539\u540e\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n\n\n\n
          \u8bed\u6cd5<\/strong>\uff1a<\/p>\n\n\n\n
             substr_replace(string $string, string $replacement, int $start, int $length = ?): string<\/code><\/pre>\n\n\n\n
            \n
          • $replacement<\/code>\uff1a\u66ff\u6362\u7684\u5b57\u7b26\u4e32\u3002<\/li>\n\n\n\n
          • $start<\/code>\uff1a\u5f00\u59cb\u4f4d\u7f6e\u3002<\/li>\n\n\n\n
          • $length<\/code>\uff1a\u8981\u66ff\u6362\u7684\u957f\u5ea6\u3002 \u793a\u4f8b<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
               $str = \"Hello, World!\";\n   echo substr_replace($str, \"PHP\", 7, 5);  \/\/ \u8f93\u51fa \"Hello, PHP!\"<\/code><\/pre>\n\n\n\n
            \n\n\n\n
            6. strtok()<\/code><\/strong><\/h3>\n\n\n\n
            strtok()<\/code> \u662f\u4e00\u4e2a\u57fa\u4e8e\u5206\u9694\u7b26\u7684\u5b57\u7b26\u4e32\u5206\u5272\u51fd\u6570\uff0c\u5b83\u4f1a\u8fd4\u56de\u6bcf\u4e2a\u5206\u5272\u51fa\u6765\u7684\u5b50\u4e32\uff0c\u76f4\u5230\u6ca1\u6709\u66f4\u591a\u7684\u5206\u5272\u70b9\u3002<\/p>\n\n\n\n
            \u8bed\u6cd5<\/strong>\uff1a<\/p>\n\n\n\n
               strtok(string $string, string $delimiter): string<\/code><\/pre>\n\n\n\n
              \n
            • $delimiter<\/code>\uff1a\u6307\u5b9a\u5206\u9694\u7b26\u3002 \u793a\u4f8b<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
                 $str = \"apple,banana,cherry\";\n   $token = strtok($str, \",\");\n   while ($token !== false) {\n       echo $token . \"\\n\";  \/\/ \u8f93\u51fa\u6bcf\u4e2a\u5206\u9694\u7684\u5b50\u4e32\n       $token = strtok(\",\");\n   }<\/code><\/pre>\n\n\n\n
              \n\n\n\n
              7. preg_match()<\/code><\/strong><\/h3>\n\n\n\n
              \u5982\u679c\u4f60\u9700\u8981\u6839\u636e\u6b63\u5219\u8868\u8fbe\u5f0f\u6765\u622a\u53d6\u5b57\u7b26\u4e32\u7684\u4e00\u90e8\u5206\uff0c\u53ef\u4ee5\u4f7f\u7528 preg_match()<\/code>\u3002<\/p>\n\n\n\n
              \u8bed\u6cd5<\/strong>\uff1a<\/p>\n\n\n\n
                 preg_match(string $pattern, string $subject, array &$matches): int<\/code><\/pre>\n\n\n\n
                \n
              • $pattern<\/code>\uff1a\u6b63\u5219\u8868\u8fbe\u5f0f\u3002<\/li>\n\n\n\n
              • $subject<\/code>\uff1a\u76ee\u6807\u5b57\u7b26\u4e32\u3002<\/li>\n\n\n\n
              • $matches<\/code>\uff1a\u5339\u914d\u7ed3\u679c\u6570\u7ec4\u3002 \u793a\u4f8b<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
                   $str = \"Hello, my name is John\";\n   preg_match(\"\/name is (\\w+)\/\", $str, $matches);\n   echo $matches[1];  \/\/ \u8f93\u51fa \"John\"<\/code><\/pre>\n\n\n\n
                \n\n\n\n
                8. str_replace()<\/code><\/strong><\/h3>\n\n\n\n
                str_replace()<\/code> \u7528\u4e8e\u66ff\u6362\u5b57\u7b26\u4e32\u4e2d\u7684\u67d0\u4e2a\u90e8\u5206\u3002\u867d\u7136\u5b83\u4e0d\u76f4\u63a5\u7528\u4e8e\u622a\u53d6\uff0c\u4f46\u4f60\u53ef\u4ee5\u5229\u7528\u5b83\u5220\u9664\u5b57\u7b26\u4e32\u7684\u4e00\u90e8\u5206\uff0c\u4ece\u800c\u5b9e\u73b0\u622a\u53d6\u3002<\/p>\n\n\n\n
                \u8bed\u6cd5<\/strong>\uff1a<\/p>\n\n\n\n
                   str_replace(mixed $search, mixed $replace, mixed $subject): string<\/code><\/pre>\n\n\n\n
                  \n
                • $search<\/code>\uff1a\u8981\u67e5\u627e\u7684\u5185\u5bb9\u3002<\/li>\n\n\n\n
                • $replace<\/code>\uff1a\u66ff\u6362\u6210\u7684\u5185\u5bb9\u3002 \u793a\u4f8b<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
                     $str = \"Hello, World!\";\n   echo str_replace(\"World\", \"\", $str);  \/\/ \u8f93\u51fa \"Hello, !\"<\/code><\/pre>\n\n\n\n
                  \n\n\n\n
                  \u603b\u7ed3<\/h3>\n\n\n\n
                    \n
                  • substr()<\/code><\/strong>\uff1a\u9002\u7528\u4e8e\u5e38\u89c1\u7684\u622a\u53d6\u5b57\u7b26\u4e32\u3002<\/li>\n\n\n\n
                  • mb_substr()<\/code><\/strong>\uff1a\u9002\u7528\u4e8e\u591a\u5b57\u8282\u5b57\u7b26\u96c6\uff08\u5982\u4e2d\u6587\uff09\u7684\u622a\u53d6\u3002<\/li>\n\n\n\n
                  • str_split()<\/code><\/strong>\uff1a\u5c06\u5b57\u7b26\u4e32\u62c6\u5206\u4e3a\u6570\u7ec4\u3002<\/li>\n\n\n\n
                  • explode()<\/code><\/strong>\uff1a\u6309\u5206\u9694\u7b26\u5c06\u5b57\u7b26\u4e32\u62c6\u5206\u4e3a\u6570\u7ec4\u3002<\/li>\n\n\n\n
                  • substr_replace()<\/code><\/strong>\uff1a\u66ff\u6362\u5b57\u7b26\u4e32\u4e2d\u7684\u4e00\u90e8\u5206\u3002<\/li>\n\n\n\n
                  • strtok()<\/code><\/strong>\uff1a\u6309\u5206\u9694\u7b26\u83b7\u53d6\u5b57\u7b26\u4e32\u7684\u5404\u4e2a\u90e8\u5206\u3002<\/li>\n\n\n\n
                  • preg_match()<\/code><\/strong>\uff1a\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u8fdb\u884c\u66f4\u590d\u6742\u7684\u5339\u914d\u548c\u622a\u53d6\u3002<\/li>\n<\/ul>\n\n\n\n
                    \u8fd9\u4e9b\u65b9\u6cd5\u53ef\u4ee5\u6839\u636e\u4f60\u7684\u9700\u6c42\u6765\u9009\u62e9\u4f7f\u7528\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
                    \u5728 PHP \u4e2d\uff0c\u622a\u53d6\u5b57\u7b26\u4e32\u7684\u65b9\u6cd5\u6709\u5f88\u591a\uff0c\u4e0b\u9762\u662f\u4e00\u4e9b\u5e38\u89c1\u7684\u622a\u53d6\u5b57\u7b26\u4e32\u7684\u65b9\u6cd5\u53ca\u5176\u4f7f\u7528\u793a\u4f8b\uff1a 1. substr() […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[61],"tags":[],"class_list":["post-742","post","type-post","status-publish","format-standard","hentry","category-php-"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/742","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=742"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/742\/revisions"}],"predecessor-version":[{"id":743,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/742\/revisions\/743"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=742"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=742"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=742"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}