{"id":3102,"date":"2025-03-22T00:09:02","date_gmt":"2025-03-21T16:09:02","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=3102"},"modified":"2025-03-22T00:09:02","modified_gmt":"2025-03-21T16:09:02","slug":"php-mysql-%e9%a2%84%e5%a4%84%e7%90%86%e8%af%ad%e5%8f%a5","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/03\/22\/php-mysql-%e9%a2%84%e5%a4%84%e7%90%86%e8%af%ad%e5%8f%a5\/","title":{"rendered":"PHP MySQL \u9884\u5904\u7406\u8bed\u53e5"},"content":{"rendered":"\n

\u9884\u5904\u7406\u8bed\u53e5\uff08Prepared Statements\uff09\u662f MySQL \u63d0\u4f9b\u7684\u4e00\u79cd\u589e\u5f3a SQL \u67e5\u8be2\u7684\u65b9\u5f0f\u3002\u5b83\u53ef\u4ee5\u6709\u6548\u9632\u6b62 SQL \u6ce8\u5165<\/strong>\uff0c\u63d0\u9ad8\u6027\u80fd\uff0c\u5e76\u7b80\u5316\u4ee3\u7801\u3002\u9884\u5904\u7406\u8bed\u53e5\u901a\u8fc7\u5148\u7f16\u8bd1 SQL \u67e5\u8be2\u6a21\u677f\uff0c\u5e76\u5c06\u6570\u636e\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9\u67e5\u8be2\uff0c\u907f\u514d\u4e86 SQL \u67e5\u8be2\u5b57\u7b26\u4e32\u62fc\u63a5\u3002<\/p>\n\n\n\n

1. \u9884\u5904\u7406\u8bed\u53e5\u6982\u5ff5<\/strong><\/h2>\n\n\n\n

\u9884\u5904\u7406\u8bed\u53e5\u5305\u62ec\u4e24\u90e8\u5206\uff1a<\/p>\n\n\n\n

    \n
  1. \u51c6\u5907\u9636\u6bb5<\/strong>\uff1a\u521b\u5efa SQL \u67e5\u8be2\u6a21\u677f\u3002<\/li>\n\n\n\n
  2. \u6267\u884c\u9636\u6bb5<\/strong>\uff1a\u5c06\u53c2\u6570\u7ed1\u5b9a\u5230\u67e5\u8be2\u6a21\u677f\u5e76\u6267\u884c\u67e5\u8be2\u3002<\/li>\n<\/ol>\n\n\n\n

    \u8fd9\u79cd\u673a\u5236\u907f\u514d\u4e86\u7528\u6237\u8f93\u5165\u76f4\u63a5\u4e0e SQL \u67e5\u8be2\u62fc\u63a5\uff0c\u63d0\u9ad8\u4e86\u5b89\u5168\u6027\u3002\u9884\u5904\u7406\u8bed\u53e5\u5728 SQL \u67e5\u8be2\u6267\u884c\u524d\u8fdb\u884c\u7f16\u8bd1\uff0c\u4e4b\u540e\u53ef\u4ee5\u591a\u6b21\u6267\u884c\uff0c\u53ea\u9700\u63d0\u4f9b\u4e0d\u540c\u7684\u53c2\u6570\u3002<\/p>\n\n\n\n

    \n\n\n\n

    2. \u4f7f\u7528 MySQLi \u8fdb\u884c\u9884\u5904\u7406\u8bed\u53e5<\/strong><\/h2>\n\n\n\n

    2.1 \u9884\u5904\u7406\u8bed\u53e5\u6d41\u7a0b\uff08\u9762\u5411\u5bf9\u8c61\uff09<\/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: \" . $conn->connect_error);\n}\n\n\/\/ \u521b\u5efa\u9884\u5904\u7406\u8bed\u53e5\n$sql = \"INSERT INTO users (username, email, password) VALUES (?, ?, ?)\";\n$stmt = $conn->prepare($sql);\n\n\/\/ \u7ed1\u5b9a\u53c2\u6570\n$stmt->bind_param(\"sss\", $username, $email, $password);\n\n\/\/ \u8bbe\u7f6e\u53c2\u6570\u5e76\u6267\u884c\n$username = \"user1\";\n$email = \"user1@example.com\";\n$password = \"password123\";\n$stmt->execute();\n\necho \"\u65b0\u8bb0\u5f55\u63d2\u5165\u6210\u529f\";\n\n\/\/ \u5173\u95ed\u8fde\u63a5\n$stmt->close();\n$conn->close();\n?><\/code><\/pre>\n\n\n\n
    \ud83d\udccc \u89e3\u6790<\/strong>\uff1a<\/p>\n\n\n\n
      \n
    • $conn->prepare($sql)<\/code><\/strong>\uff1a\u51c6\u5907 SQL \u8bed\u53e5\u6a21\u677f\u3002<\/li>\n\n\n\n
    • $stmt->bind_param(\"sss\", $username, $email, $password)<\/code><\/strong>\uff1a\u5c06\u7528\u6237\u8f93\u5165\u7684\u53d8\u91cf\u7ed1\u5b9a\u5230 SQL \u8bed\u53e5\u4e2d\u7684\u53c2\u6570\u3002 \"sss\"<\/code> \u8868\u793a\u53c2\u6570\u7c7b\u578b\u4e3a\u4e09\u4e2a\u5b57\u7b26\u4e32\uff08string<\/code>\uff09\u3002<\/li>\n\n\n\n
    • execute()<\/code><\/strong>\uff1a\u6267\u884c\u9884\u5904\u7406\u8bed\u53e5\u3002<\/li>\n<\/ul>\n\n\n\n
      \n\n\n\n
      2.2 \u9884\u5904\u7406\u8bed\u53e5\u6d41\u7a0b\uff08\u8fc7\u7a0b\u5316\uff09<\/strong><\/h3>\n\n\n\n
      <?php\n$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\/\/ \u521b\u5efa\u9884\u5904\u7406\u8bed\u53e5\n$sql = \"INSERT INTO users (username, email, password) VALUES (?, ?, ?)\";\n$stmt = mysqli_prepare($conn, $sql);\n\n\/\/ \u7ed1\u5b9a\u53c2\u6570\nmysqli_stmt_bind_param($stmt, \"sss\", $username, $email, $password);\n\n\/\/ \u8bbe\u7f6e\u53c2\u6570\u5e76\u6267\u884c\n$username = \"user2\";\n$email = \"user2@example.com\";\n$password = \"password456\";\nmysqli_stmt_execute($stmt);\n\necho \"\u65b0\u8bb0\u5f55\u63d2\u5165\u6210\u529f\";\n\n\/\/ \u5173\u95ed\u8fde\u63a5\nmysqli_stmt_close($stmt);\nmysqli_close($conn);\n?><\/code><\/pre>\n\n\n\n
      \ud83d\udccc \u89e3\u6790<\/strong>\uff1a<\/p>\n\n\n\n
        \n
      • mysqli_prepare($conn, $sql)<\/code><\/strong>\uff1a\u51c6\u5907 SQL \u67e5\u8be2\u3002<\/li>\n\n\n\n
      • mysqli_stmt_bind_param($stmt, \"sss\", $username, $email, $password)<\/code><\/strong>\uff1a\u7ed1\u5b9a\u53c2\u6570\uff0c\u5176\u4e2d \"sss\"<\/code> \u6307\u5b9a\u4e86\u4e09\u4e2a\u5b57\u7b26\u4e32\u7c7b\u578b\u3002<\/li>\n\n\n\n
      • mysqli_stmt_execute($stmt)<\/code><\/strong>\uff1a\u6267\u884c\u9884\u5904\u7406\u8bed\u53e5\u3002<\/li>\n<\/ul>\n\n\n\n
        \n\n\n\n
        3. \u9884\u5904\u7406\u8bed\u53e5\u67e5\u8be2\uff08SELECT\uff09\u793a\u4f8b<\/strong><\/h2>\n\n\n\n
        3.1 \u4f7f\u7528 MySQLi \u8fdb\u884c SELECT \u67e5\u8be2<\/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: \" . $conn->connect_error);\n}\n\n\/\/ \u521b\u5efa\u9884\u5904\u7406\u8bed\u53e5\n$sql = \"SELECT id, username, email FROM users WHERE username = ?\";\n$stmt = $conn->prepare($sql);\n\n\/\/ \u7ed1\u5b9a\u53c2\u6570\n$stmt->bind_param(\"s\", $username);\n\n\/\/ \u8bbe\u7f6e\u53c2\u6570\u5e76\u6267\u884c\n$username = \"user1\";\n$stmt->execute();\n\n\/\/ \u7ed1\u5b9a\u7ed3\u679c\u53d8\u91cf\n$stmt->bind_result($id, $username, $email);\n\n\/\/ \u83b7\u53d6\u67e5\u8be2\u7ed3\u679c\nwhile ($stmt->fetch()) {\n    echo \"ID: $id, \u7528\u6237\u540d: $username, \u90ae\u7bb1: $email<br>\";\n}\n\n\/\/ \u5173\u95ed\u8fde\u63a5\n$stmt->close();\n$conn->close();\n?><\/code><\/pre>\n\n\n\n
        \ud83d\udccc \u89e3\u6790<\/strong>\uff1a<\/p>\n\n\n\n
          \n
        • bind_param(\"s\", $username)<\/code><\/strong>\uff1as<\/code> \u8868\u793a\u8be5\u53c2\u6570\u662f\u5b57\u7b26\u4e32\u7c7b\u578b\u3002<\/li>\n\n\n\n
        • bind_result($id, $username, $email)<\/code><\/strong>\uff1a\u7ed1\u5b9a\u67e5\u8be2\u7ed3\u679c\u5217\u5230\u53d8\u91cf $id<\/code>\u3001$username<\/code> \u548c $email<\/code>\u3002<\/li>\n\n\n\n
        • fetch()<\/code><\/strong>\uff1a\u83b7\u53d6\u7ed3\u679c\u96c6\u5e76\u8f93\u51fa\u3002<\/li>\n<\/ul>\n\n\n\n
          \n\n\n\n
          3.2 \u4f7f\u7528 PDO \u8fdb\u884c SELECT \u67e5\u8be2<\/strong><\/h3>\n\n\n\n
          <?php\n$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    $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);\n\n    \/\/ \u521b\u5efa\u9884\u5904\u7406\u8bed\u53e5\n    $sql = \"SELECT id, username, email FROM users WHERE username = :username\";\n    $stmt = $pdo->prepare($sql);\n\n    \/\/ \u7ed1\u5b9a\u53c2\u6570\n    $stmt->bindParam(':username', $username, PDO::PARAM_STR);\n\n    \/\/ \u8bbe\u7f6e\u53c2\u6570\u5e76\u6267\u884c\n    $username = \"user1\";\n    $stmt->execute();\n\n    \/\/ \u83b7\u53d6\u67e5\u8be2\u7ed3\u679c\n    while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) {\n        echo \"ID: \" . $row['id'] . \", \u7528\u6237\u540d: \" . $row['username'] . \", \u90ae\u7bb1: \" . $row['email'] . \"<br>\";\n    }\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
          • bindParam(':username', $username, PDO::PARAM_STR)<\/code><\/strong>\uff1a\u7ed1\u5b9a\u53c2\u6570\uff0c\u4f7f\u7528 \u547d\u540d\u5360\u4f4d\u7b26<\/strong>\uff08:username<\/code>\uff09\u3002<\/li>\n\n\n\n
          • fetch(PDO::FETCH_ASSOC)<\/code><\/strong>\uff1a\u83b7\u53d6\u7ed3\u679c\u884c\uff0c\u8fd4\u56de\u5173\u8054\u6570\u7ec4\u3002<\/li>\n<\/ul>\n\n\n\n
            \n\n\n\n
            4. \u9884\u5904\u7406\u8bed\u53e5\u7684\u4f18\u52bf<\/strong><\/h2>\n\n\n\n
            4.1 \u9632\u6b62 SQL \u6ce8\u5165<\/strong><\/h3>\n\n\n\n
            \u9884\u5904\u7406\u8bed\u53e5\u7684\u6700\u5927\u4f18\u52bf\u662f \u9632\u6b62 SQL \u6ce8\u5165<\/strong>\u3002\u901a\u8fc7\u5c06\u7528\u6237\u8f93\u5165\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\uff0c\u800c\u975e\u76f4\u63a5\u62fc\u63a5\u5728\u67e5\u8be2\u5b57\u7b26\u4e32\u4e2d\uff0c\u907f\u514d\u4e86\u6f5c\u5728\u7684 SQL \u6ce8\u5165\u653b\u51fb\u3002<\/p>\n\n\n\n
            \u4f8b\u5982\uff0c\u4ee5\u4e0b\u6076\u610f\u7528\u6237\u8f93\u5165\uff1a<\/p>\n\n\n\n
            $username = \"admin' OR 1=1 -- \";<\/code><\/pre>\n\n\n\n
            \u5982\u679c\u6ca1\u6709\u9884\u5904\u7406\u8bed\u53e5\uff0c\u653b\u51fb\u8005\u53ef\u80fd\u901a\u8fc7 SQL \u6ce8\u5165\u64cd\u63a7\u67e5\u8be2\uff0c\u800c\u9884\u5904\u7406\u8bed\u53e5\u4f1a\u81ea\u52a8\u5bf9\u53c2\u6570\u8fdb\u884c\u8f6c\u4e49\uff0c\u9632\u6b62\u6ce8\u5165\u3002<\/p>\n\n\n\n
            4.2 \u63d0\u9ad8\u6027\u80fd<\/strong><\/h3>\n\n\n\n
            \u5982\u679c\u6211\u4eec\u9700\u8981\u6267\u884c\u76f8\u540c\u7684\u67e5\u8be2\u591a\u6b21\uff08\u4f46\u4f20\u9012\u4e0d\u540c\u7684\u53c2\u6570\uff09\uff0c\u9884\u5904\u7406\u8bed\u53e5\u53ef\u4ee5\u5c06 SQL \u67e5\u8be2\u7f16\u8bd1\u4e00\u6b21\uff0c\u7136\u540e\u591a\u6b21\u6267\u884c\uff0c\u907f\u514d\u4e86\u91cd\u590d\u7f16\u8bd1\u7684\u6027\u80fd\u5f00\u9500\u3002<\/p>\n\n\n\n
            4.3 \u7b80\u5316\u4ee3\u7801<\/strong><\/h3>\n\n\n\n
            \u9884\u5904\u7406\u8bed\u53e5\u4f7f\u5f97\u67e5\u8be2\u6a21\u677f\u548c\u6570\u636e\u5206\u79bb\uff0c\u4ee3\u7801\u66f4\u52a0\u6e05\u6670\u548c\u53ef\u7ef4\u62a4\u3002\u7279\u522b\u662f\u5bf9\u4e8e\u590d\u6742\u7684 SQL \u67e5\u8be2\uff0c\u4ee3\u7801\u7ed3\u6784\u66f4\u52a0\u6574\u6d01\u3002<\/p>\n\n\n\n
            \n\n\n\n
            5. \u5e38\u89c1\u9519\u8bef\u548c\u89e3\u51b3\u65b9\u6848<\/strong><\/h2>\n\n\n\n
            5.1 \u9519\u8bef\uff1a\u53c2\u6570\u7ed1\u5b9a\u5931\u8d25<\/strong><\/h3>\n\n\n\n
            \u9519\u8bef\u4fe1\u606f\u53ef\u80fd\u662f\uff1a<\/p>\n\n\n\n
            Warning: mysqli_stmt_bind_param() expects parameter 1 to be mysqli_stmt, boolean given<\/code><\/pre>\n\n\n\n
            \u539f\u56e0<\/strong>\uff1a\u672a\u80fd\u6210\u529f\u51c6\u5907 SQL \u8bed\u53e5\uff08prepare()<\/code> \u8fd4\u56de false\uff09\uff0c\u901a\u5e38\u662f SQL \u8bed\u53e5\u4e2d\u5b58\u5728\u9519\u8bef\u3002<\/p>\n\n\n\n
            \u89e3\u51b3\u65b9\u6848<\/strong>\uff1a<\/p>\n\n\n\n
              \n
            • \u68c0\u67e5 SQL \u8bed\u53e5\u662f\u5426\u6b63\u786e\u3002<\/li>\n\n\n\n
            • \u4f7f\u7528 mysqli_error($conn)<\/code> \u67e5\u770b\u9519\u8bef\u8be6\u60c5\u3002<\/li>\n<\/ul>\n\n\n\n
              5.2 \u9519\u8bef\uff1a\u7f3a\u5c11\u53c2\u6570<\/strong><\/h3>\n\n\n\n
              \u5982\u679c\u6ca1\u6709\u7ed1\u5b9a\u6240\u6709\u53c2\u6570\uff0c\u53ef\u80fd\u4f1a\u9047\u5230\uff1a<\/p>\n\n\n\n
              Warning: mysqli_stmt_bind_param() expects at least 3 parameters, 2 given<\/code><\/pre>\n\n\n\n
              \u89e3\u51b3\u65b9\u6848<\/strong>\uff1a<\/p>\n\n\n\n
                \n
              • \u786e\u4fdd\u5728\u7ed1\u5b9a\u53c2\u6570\u65f6\uff0c\u4f20\u9012\u6b63\u786e\u6570\u91cf\u7684\u53c2\u6570\uff0c\u5e76\u786e\u4fdd\u6bcf\u4e2a\u53c2\u6570\u90fd\u4e0e SQL \u8bed\u53e5\u4e2d\u7684\u5360\u4f4d\u7b26\u5339\u914d\u3002<\/li>\n<\/ul>\n\n\n\n
                \n\n\n\n
                \u603b\u7ed3<\/strong><\/h2>\n\n\n\n
                \u65b9\u6cd5<\/strong><\/th>\u8fde\u63a5\u7c7b\u578b<\/strong><\/th>\u5b89\u5168\u6027<\/strong><\/th>\u6027\u80fd<\/strong><\/th><\/tr><\/thead>
                MySQLi \u9884\u5904\u7406\u8bed\u53e5<\/strong><\/td>\u9762\u5411\u5bf9\u8c61\u3001\u8fc7\u7a0b\u5316<\/td>\u9ad8<\/td>\u9ad8<\/td><\/tr>
                PDO \u9884\u5904\u7406\u8bed\u53e5<\/strong><\/td>\u9762\u5411\u5bf9\u8c61<\/td>\u9ad8<\/td>\u9ad8<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
                \u9884\u5904\u7406\u8bed\u53e5\u662f\u5904\u7406 SQL \u67e5\u8be2\u7684\u6700\u4f73\u5b9e\u8df5\uff0c\u5b83\u4e0d\u4ec5\u589e\u5f3a\u4e86 \u5b89\u5168\u6027<\/strong>\uff0c\u8fd8\u63d0\u5347\u4e86\u6027\u80fd\u548c\u4ee3\u7801\u7684\u53ef\u7ef4\u62a4\u6027\u3002\u5f3a\u70c8\u63a8\u8350<\/strong> \u5728\u5904\u7406\u7528\u6237\u8f93\u5165\u65f6\u603b\u662f\u4f7f\u7528\u9884\u5904\u7406\u8bed\u53e5\u6765\u9632\u6b62 SQL \u6ce8\u5165\u3002<\/p>\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":"
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