{"id":3114,"date":"2025-03-22T00:17:01","date_gmt":"2025-03-21T16:17:01","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=3114"},"modified":"2025-03-22T00:17:01","modified_gmt":"2025-03-21T16:17:01","slug":"php-mysql-update-%e8%af%ad%e5%8f%a5","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/03\/22\/php-mysql-update-%e8%af%ad%e5%8f%a5\/","title":{"rendered":"PHP MySQL UPDATE \u8bed\u53e5"},"content":{"rendered":"\n

UPDATE<\/code> \u8bed\u53e5\u7528\u4e8e\u4fee\u6539 MySQL \u6570\u636e\u5e93\u4e2d\u7684\u73b0\u6709\u8bb0\u5f55\u3002\u4e0e SELECT<\/code> \u8bed\u53e5\u4e0d\u540c\uff0cUPDATE<\/code> \u8bed\u53e5\u662f\u7528\u6765\u66f4\u65b0\u8868\u4e2d\u7684\u6570\u636e\u884c\u3002<\/p>\n\n\n\n

\u5728 PHP \u4e2d\uff0c\u4f7f\u7528 MySQLi<\/code> \u6216 PDO<\/code> \u8fde\u63a5\u5230\u6570\u636e\u5e93\u540e\uff0c\u4f60\u53ef\u4ee5\u6267\u884c\u5e26\u6709 UPDATE<\/code> \u8bed\u53e5\u7684\u67e5\u8be2\u6765\u66f4\u65b0\u6570\u636e\u3002<\/p>\n\n\n\n

\n\n\n\n

1. MySQL UPDATE \u57fa\u672c\u8bed\u6cd5<\/strong><\/h2>\n\n\n\n
UPDATE table_name\nSET column1 = value1, column2 = value2, ...\nWHERE condition;<\/code><\/pre>\n\n\n\n
    \n
  • table_name<\/code><\/strong>\uff1a\u8981\u66f4\u65b0\u7684\u8868\u7684\u540d\u79f0\u3002<\/li>\n\n\n\n
  • SET column1 = value1, column2 = value2, ...<\/code><\/strong>\uff1a\u6307\u5b9a\u8981\u66f4\u65b0\u7684\u5217\u4ee5\u53ca\u5b83\u4eec\u7684\u65b0\u503c\u3002<\/li>\n\n\n\n
  • WHERE<\/code><\/strong>\uff1a\u6307\u5b9a\u54ea\u4e9b\u8bb0\u5f55\u5e94\u8be5\u88ab\u66f4\u65b0\u3002\u5982\u679c\u6ca1\u6709 WHERE<\/code> \u5b50\u53e5\uff0c\u6240\u6709\u8bb0\u5f55\u90fd\u4f1a\u88ab\u66f4\u65b0\u3002<\/li>\n<\/ul>\n\n\n\n
    \n\n\n\n
    2. \u4f7f\u7528 MySQLi \u6267\u884c UPDATE<\/strong><\/h2>\n\n\n\n
    2.1 \u4f7f\u7528\u9762\u5411\u5bf9\u8c61\u65b9\u5f0f<\/strong><\/h3>\n\n\n\n
    <?php\n$servername = \"localhost\";\n$username = \"root\";\n$password = \"\";\n$dbname = \"my_database\";\n\n\/\/ \u521b\u5efa\u8fde\u63a5\n$conn = new mysqli($servername, $username, $password, $dbname);\n\n\/\/ \u68c0\u67e5\u8fde\u63a5\nif ($conn->connect_error) {\n    die(\"\u8fde\u63a5\u5931\u8d25: \" . $conn->connect_error);\n}\n\n\/\/ \u66f4\u65b0 SQL \u8bed\u53e5\n$sql = \"UPDATE users SET username = 'new_username', email = 'new_email@example.com' WHERE id = 1\";\n\n\/\/ \u6267\u884c\u66f4\u65b0\u67e5\u8be2\nif ($conn->query($sql) === TRUE) {\n    echo \"\u8bb0\u5f55\u66f4\u65b0\u6210\u529f\";\n} else {\n    echo \"\u9519\u8bef: \" . $conn->error;\n}\n\n\/\/ \u5173\u95ed\u8fde\u63a5\n$conn->close();\n?><\/code><\/pre>\n\n\n\n
    \ud83d\udccc \u89e3\u6790<\/strong>\uff1a<\/p>\n\n\n\n
      \n
    • SET username = 'new_username', email = 'new_email@example.com'<\/code><\/strong>\uff1a\u6307\u5b9a\u8981\u66f4\u65b0\u7684\u5217\u548c\u503c\u3002<\/li>\n\n\n\n
    • WHERE id = 1<\/code><\/strong>\uff1a\u53ea\u6709 id<\/code> \u4e3a 1<\/code> \u7684\u8bb0\u5f55\u624d\u4f1a\u88ab\u66f4\u65b0\u3002<\/li>\n<\/ul>\n\n\n\n
      2.2 \u4f7f\u7528\u8fc7\u7a0b\u5316\u65b9\u5f0f<\/strong><\/h3>\n\n\n\n
      <?php\n$servername = \"localhost\";\n$username = \"root\";\n$password = \"\";\n$dbname = \"my_database\";\n\n\/\/ \u521b\u5efa\u8fde\u63a5\n$conn = mysqli_connect($servername, $username, $password, $dbname);\n\n\/\/ \u68c0\u67e5\u8fde\u63a5\nif (!$conn) {\n    die(\"\u8fde\u63a5\u5931\u8d25: \" . mysqli_connect_error());\n}\n\n\/\/ \u66f4\u65b0 SQL \u8bed\u53e5\n$sql = \"UPDATE users SET username = 'new_username', email = 'new_email@example.com' WHERE id = 1\";\n\n\/\/ \u6267\u884c\u66f4\u65b0\u67e5\u8be2\nif (mysqli_query($conn, $sql)) {\n    echo \"\u8bb0\u5f55\u66f4\u65b0\u6210\u529f\";\n} else {\n    echo \"\u9519\u8bef: \" . mysqli_error($conn);\n}\n\n\/\/ \u5173\u95ed\u8fde\u63a5\nmysqli_close($conn);\n?><\/code><\/pre>\n\n\n\n
      \ud83d\udccc \u89e3\u6790<\/strong>\uff1a<\/p>\n\n\n\n
        \n
      • \u4f7f\u7528 mysqli_query()<\/code><\/strong> \u6267\u884c UPDATE<\/code> \u67e5\u8be2\u3002<\/li>\n\n\n\n
      • \u4f7f\u7528 WHERE<\/code><\/strong> \u5b50\u53e5\u6765\u6307\u5b9a\u66f4\u65b0\u6761\u4ef6\u3002<\/li>\n<\/ul>\n\n\n\n
        \n\n\n\n
        3. \u4f7f\u7528 PDO \u6267\u884c UPDATE<\/strong><\/h2>\n\n\n\n
        3.1 \u4f7f\u7528 PDO \u6267\u884c UPDATE \u8bed\u53e5<\/strong><\/h3>\n\n\n\n
        <?php\n$servername = \"localhost\";\n$username = \"root\";\n$password = \"\";\n$dbname = \"my_database\";\n\ntry {\n    \/\/ \u521b\u5efa PDO \u8fde\u63a5\n    $pdo = new PDO(\"mysql:host=$servername;dbname=$dbname\", $username, $password);\n    \/\/ \u8bbe\u7f6e\u9519\u8bef\u6a21\u5f0f\n    $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);\n\n    \/\/ \u66f4\u65b0 SQL \u8bed\u53e5\n    $sql = \"UPDATE users SET username = :username, email = :email WHERE id = :id\";\n\n    \/\/ \u51c6\u5907 SQL \u8bed\u53e5\n    $stmt = $pdo->prepare($sql);\n\n    \/\/ \u7ed1\u5b9a\u53c2\u6570\n    $stmt->bindParam(':username', $username);\n    $stmt->bindParam(':email', $email);\n    $stmt->bindParam(':id', $id);\n\n    \/\/ \u8bbe\u7f6e\u53c2\u6570\u503c\n    $username = \"new_username\";\n    $email = \"new_email@example.com\";\n    $id = 1;\n\n    \/\/ \u6267\u884c\u66f4\u65b0\u67e5\u8be2\n    $stmt->execute();\n\n    echo \"\u8bb0\u5f55\u66f4\u65b0\u6210\u529f\";\n} catch (PDOException $e) {\n    echo \"\u9519\u8bef: \" . $e->getMessage();\n}\n\n\/\/ \u5173\u95ed\u8fde\u63a5\n$pdo = null;\n?><\/code><\/pre>\n\n\n\n
        \ud83d\udccc \u89e3\u6790<\/strong>\uff1a<\/p>\n\n\n\n
          \n
        • \u4f7f\u7528 bindParam()<\/code><\/strong> \u6765\u7ed1\u5b9a\u53c2\u6570\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d SQL \u6ce8\u5165\u3002<\/li>\n\n\n\n
        • \u53c2\u6570\u901a\u8fc7 execute()<\/code><\/strong> \u6267\u884c\uff0c\u53c2\u6570\u503c\u5728\u6267\u884c\u524d\u52a8\u6001\u8d4b\u503c\u3002<\/li>\n<\/ul>\n\n\n\n
          \n\n\n\n
          4. \u9884\u5904\u7406\u8bed\u53e5\u7684\u5b89\u5168\u6027<\/strong><\/h2>\n\n\n\n
          \u5f53\u4f60\u901a\u8fc7 PHP \u8fde\u63a5 MySQL \u5e76\u4f7f\u7528 UPDATE<\/code> \u67e5\u8be2\u65f6\uff0c\u6700\u597d\u4f7f\u7528 \u9884\u5904\u7406\u8bed\u53e5<\/strong> \u6765\u9632\u6b62 SQL \u6ce8\u5165\u3002\u5c24\u5176\u662f\u5728\u6d89\u53ca\u7528\u6237\u8f93\u5165\u7684\u6570\u636e\u65f6\uff0c\u4f7f\u7528\u9884\u5904\u7406\u8bed\u53e5\u6765\u7ed1\u5b9a\u53c2\u6570\u975e\u5e38\u91cd\u8981\u3002\u8fd9\u6837\u53ef\u4ee5\u786e\u4fdd\u67e5\u8be2\u5b89\u5168\u3002<\/p>\n\n\n\n
          4.1 \u4f7f\u7528\u9884\u5904\u7406\u8bed\u53e5\u7684\u4f18\u52bf<\/strong>\uff1a<\/h3>\n\n\n\n
            \n
          • \u9632\u6b62 SQL \u6ce8\u5165\u653b\u51fb<\/strong>\u3002<\/li>\n\n\n\n
          • \u786e\u4fdd\u6570\u636e\u7c7b\u578b\u7684\u6b63\u786e\u6027\uff08\u4f8b\u5982\uff0c\u5b57\u7b26\u4e32\u548c\u6574\u6570\u7684\u5339\u914d\uff09\u3002<\/li>\n\n\n\n
          • \u63d0\u9ad8\u67e5\u8be2\u6548\u7387\uff0c\u5c24\u5176\u662f\u5f53\u4f60\u91cd\u590d\u6267\u884c\u76f8\u540c\u7c7b\u578b\u7684\u67e5\u8be2\u65f6\u3002<\/li>\n<\/ul>\n\n\n\n
            \n\n\n\n
            5. \u793a\u4f8b\uff1a\u66f4\u65b0\u591a\u4e2a\u5b57\u6bb5<\/strong><\/h2>\n\n\n\n
            <?php\n$servername = \"localhost\";\n$username = \"root\";\n$password = \"\";\n$dbname = \"my_database\";\n\n\/\/ \u521b\u5efa\u8fde\u63a5\n$conn = new mysqli($servername, $username, $password, $dbname);\n\n\/\/ \u68c0\u67e5\u8fde\u63a5\nif ($conn->connect_error) {\n    die(\"\u8fde\u63a5\u5931\u8d25: \" . $conn->connect_error);\n}\n\n\/\/ \u66f4\u65b0 SQL \u8bed\u53e5\n$sql = \"UPDATE users SET username = 'new_username', email = 'new_email@example.com', age = 30 WHERE id = 2\";\n\n\/\/ \u6267\u884c\u66f4\u65b0\u67e5\u8be2\nif ($conn->query($sql) === TRUE) {\n    echo \"\u8bb0\u5f55\u66f4\u65b0\u6210\u529f\";\n} else {\n    echo \"\u9519\u8bef: \" . $conn->error;\n}\n\n\/\/ \u5173\u95ed\u8fde\u63a5\n$conn->close();\n?><\/code><\/pre>\n\n\n\n
              \n
            • \u66f4\u65b0\u591a\u4e2a\u5b57\u6bb5<\/strong>\uff1a\u901a\u8fc7 SET<\/code> \u5b50\u53e5\u66f4\u65b0\u591a\u4e2a\u5b57\u6bb5\uff0c\u4f8b\u5982 username<\/code>, email<\/code>, \u548c age<\/code>\u3002<\/li>\n\n\n\n
            • WHERE id = 2<\/code><\/strong>\uff1a\u53ea\u66f4\u65b0 id<\/code> \u4e3a 2<\/code> \u7684\u8bb0\u5f55\u3002<\/li>\n<\/ul>\n\n\n\n
              \n\n\n\n
              6. \u4f7f\u7528 LIMIT \u9650\u5236\u66f4\u65b0\u7684\u8bb0\u5f55<\/strong><\/h2>\n\n\n\n
              \u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u60a8\u53ef\u80fd\u53ea\u60f3\u66f4\u65b0\u4e00\u90e8\u5206\u8bb0\u5f55\u3002\u53ef\u4ee5\u4f7f\u7528 LIMIT<\/code> \u6765\u9650\u5236\u66f4\u65b0\u7684\u8bb0\u5f55\u6570\uff1a<\/p>\n\n\n\n
              $sql = \"UPDATE users SET username = 'new_username' WHERE age > 25 LIMIT 5\";<\/code><\/pre>\n\n\n\n
                \n
              • \u8fd9\u5c06\u66f4\u65b0\u6240\u6709 age > 25<\/code> \u7684\u7528\u6237\uff0c\u4f46\u6700\u591a\u66f4\u65b0 5 \u6761\u8bb0\u5f55\u3002<\/li>\n<\/ul>\n\n\n\n
                \n\n\n\n
                7. \u6ce8\u610f\u4e8b\u9879<\/strong><\/h2>\n\n\n\n
                  \n
                • WHERE \u5b50\u53e5\u975e\u5e38\u91cd\u8981<\/strong>\uff1a\u6ca1\u6709 WHERE<\/code> \u5b50\u53e5\u7684 UPDATE<\/code> \u4f1a\u66f4\u65b0\u8868\u4e2d\u7684\u6240\u6709\u8bb0\u5f55\uff01\u59cb\u7ec8\u786e\u4fdd\u5728\u4f7f\u7528 UPDATE<\/code> \u65f6\u6dfb\u52a0\u5408\u9002\u7684\u6761\u4ef6\u6765\u9650\u5236\u66f4\u65b0\u7684\u8bb0\u5f55\u3002<\/li>\n\n\n\n
                • \u5b57\u6bb5\u503c\u6570\u636e\u7c7b\u578b\u5339\u914d<\/strong>\uff1a\u786e\u4fdd\u5728 SET<\/code> \u5b50\u53e5\u4e2d\u66f4\u65b0\u7684\u503c\u4e0e\u5b57\u6bb5\u7684\u6570\u636e\u7c7b\u578b\u5339\u914d\u3002\u4f8b\u5982\uff0c\u5982\u679c\u5b57\u6bb5\u662f\u6574\u6570\u7c7b\u578b\uff0c\u4e0d\u8981\u5c06\u5b57\u7b26\u4e32\u4f5c\u4e3a\u5176\u65b0\u503c\u3002<\/li>\n\n\n\n
                • \u4e8b\u52a1\u5904\u7406<\/strong>\uff1a\u5f53\u4f60\u6267\u884c\u591a\u6b21\u66f4\u65b0\u64cd\u4f5c\u65f6\uff0c\u5efa\u8bae\u4f7f\u7528\u4e8b\u52a1\uff08BEGIN<\/code>, COMMIT<\/code>, ROLLBACK<\/code>\uff09\u6765\u786e\u4fdd\u6570\u636e\u4e00\u81f4\u6027\u3002<\/li>\n<\/ul>\n\n\n\n
                  \n\n\n\n
                  \u603b\u7ed3<\/strong><\/h3>\n\n\n\n
                    \n
                  • UPDATE<\/code> \u8bed\u53e5\u7528\u4e8e\u66f4\u65b0\u8868\u4e2d\u7684\u8bb0\u5f55\uff0c\u53ef\u4ee5\u901a\u8fc7 MySQLi<\/strong> \u6216 PDO<\/strong> \u6267\u884c\u3002<\/li>\n\n\n\n
                  • \u4f7f\u7528\u9884\u5904\u7406\u8bed\u53e5\u53ef\u4ee5\u9632\u6b62 SQL \u6ce8\u5165\uff0c\u63d0\u9ad8\u5e94\u7528\u7684\u5b89\u5168\u6027\u3002<\/li>\n\n\n\n
                  • \u786e\u4fdd\u4f7f\u7528 WHERE<\/code> \u5b50\u53e5\u6765\u9650\u5236\u66f4\u65b0\u7684\u8bb0\u5f55\uff0c\u907f\u514d\u66f4\u65b0\u4e0d\u5fc5\u8981\u7684\u6570\u636e\u3002<\/li>\n<\/ul>\n\n\n\n
                    \u66f4\u591a\u8be6\u7ec6\u5185\u5bb9\u8bf7\u5173\u6ce8\u5176\u4ed6\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
                    UPDATE \u8bed\u53e5\u7528\u4e8e\u4fee\u6539 MySQL \u6570\u636e\u5e93\u4e2d\u7684\u73b0\u6709\u8bb0\u5f55\u3002\u4e0e SELECT \u8bed\u53e5\u4e0d\u540c\uff0cUPDATE \u8bed\u53e5\u662f\u7528 […]<\/p>\n","protected":false},"author":1,"featured_media":3115,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[80],"tags":[],"class_list":["post-3114","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-php"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3114","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=3114"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3114\/revisions"}],"predecessor-version":[{"id":3116,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3114\/revisions\/3116"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media\/3115"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=3114"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=3114"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=3114"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}