{"id":3118,"date":"2025-03-22T00:19:11","date_gmt":"2025-03-21T16:19:11","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=3118"},"modified":"2025-03-22T00:19:11","modified_gmt":"2025-03-21T16:19:11","slug":"php-mysql-delete-%e8%af%ad%e5%8f%a5","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/03\/22\/php-mysql-delete-%e8%af%ad%e5%8f%a5\/","title":{"rendered":"PHP MySQL DELETE \u8bed\u53e5"},"content":{"rendered":"\n

DELETE<\/code> \u8bed\u53e5\u7528\u4e8e\u5220\u9664 MySQL \u6570\u636e\u5e93\u4e2d\u7684\u4e00\u6761\u6216\u591a\u6761\u8bb0\u5f55\u3002\u5728 PHP \u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7 MySQLi<\/code> \u6216 PDO<\/code> \u6765\u6267\u884c DELETE<\/code> \u8bed\u53e5\u3002<\/p>\n\n\n\n

\n\n\n\n

1. MySQL DELETE \u57fa\u672c\u8bed\u6cd5<\/strong><\/h2>\n\n\n\n
DELETE FROM table_name\nWHERE condition;<\/code><\/pre>\n\n\n\n
    \n
  • table_name<\/code><\/strong>\uff1a\u6307\u5b9a\u8981\u5220\u9664\u6570\u636e\u7684\u8868\u3002<\/li>\n\n\n\n
  • WHERE<\/code><\/strong>\uff1a\u6307\u5b9a\u6761\u4ef6\uff0c\u53ea\u6709\u7b26\u5408\u6761\u4ef6\u7684\u8bb0\u5f55\u4f1a\u88ab\u5220\u9664\u3002\u5982\u679c\u7701\u7565 WHERE<\/code> \u5b50\u53e5\uff0c\u5c06\u5220\u9664\u8868\u4e2d\u7684\u6240\u6709\u8bb0\u5f55\u3002<\/li>\n<\/ul>\n\n\n\n
    \n\n\n\n
    2. \u4f7f\u7528 MySQLi \u6267\u884c DELETE<\/strong><\/h2>\n\n\n\n
    2.1 \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: \" . $conn->connect_error);\n}\n\n\/\/ \u5220\u9664 SQL \u8bed\u53e5\n$sql = \"DELETE FROM users WHERE id = 1\";\n\n\/\/ \u6267\u884c\u5220\u9664\u67e5\u8be2\nif ($conn->query($sql) === TRUE) {\n    echo \"\u8bb0\u5f55\u5220\u9664\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
    • DELETE FROM users WHERE id = 1<\/code><\/strong>\uff1a\u5220\u9664 id<\/code> \u4e3a 1<\/code> \u7684\u8bb0\u5f55\u3002<\/li>\n\n\n\n
    • \u5982\u679c\u6ca1\u6709 WHERE<\/code> \u5b50\u53e5\uff0c\u6240\u6709\u8bb0\u5f55\u90fd\u5c06\u88ab\u5220\u9664\u3002<\/li>\n<\/ul>\n\n\n\n
      2.2 \u9762\u5411\u8fc7\u7a0b\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\/\/ \u5220\u9664 SQL \u8bed\u53e5\n$sql = \"DELETE FROM users WHERE id = 1\";\n\n\/\/ \u6267\u884c\u5220\u9664\u67e5\u8be2\nif (mysqli_query($conn, $sql)) {\n    echo \"\u8bb0\u5f55\u5220\u9664\u6210\u529f\";\n} else {\n    echo \"\u9519\u8bef: \" . mysqli_error($conn);\n}\n\n\/\/ \u5173\u95ed\u8fde\u63a5\nmysqli_close($conn);\n?><\/code><\/pre>\n\n\n\n
      \ud83d\udccc \u89e3\u6790<\/strong>\uff1a<\/p>\n\n\n\n
        \n
      • \u4f7f\u7528 mysqli_query()<\/code> \u6267\u884c DELETE<\/code> \u67e5\u8be2\u3002<\/li>\n\n\n\n
      • \u5220\u9664\u8bb0\u5f55\u65f6\u9700\u8981\u5c0f\u5fc3\uff0c\u786e\u4fdd\u6307\u5b9a\u4e86 WHERE<\/code> \u5b50\u53e5\u3002<\/li>\n<\/ul>\n\n\n\n
        \n\n\n\n
        3. \u4f7f\u7528 PDO \u6267\u884c DELETE<\/strong><\/h2>\n\n\n\n
        3.1 \u4f7f\u7528 PDO \u6267\u884c DELETE \u8bed\u53e5<\/strong><\/h3>\n\n\n\n
        <?php\n$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    \/\/ \u5220\u9664 SQL \u8bed\u53e5\n    $sql = \"DELETE FROM users WHERE id = :id\";\n\n    \/\/ \u51c6\u5907 SQL \u8bed\u53e5\n    $stmt = $pdo->prepare($sql);\n\n    \/\/ \u7ed1\u5b9a\u53c2\u6570\n    $stmt->bindParam(':id', $id);\n\n    \/\/ \u8bbe\u7f6e\u53c2\u6570\u503c\n    $id = 1;\n\n    \/\/ \u6267\u884c\u5220\u9664\u67e5\u8be2\n    $stmt->execute();\n\n    echo \"\u8bb0\u5f55\u5220\u9664\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 \u9884\u5904\u7406\u8bed\u53e5<\/strong> \u9632\u6b62 SQL \u6ce8\u5165\u3002<\/li>\n\n\n\n
        • bindParam()<\/code> \u7528\u4e8e\u7ed1\u5b9a\u53c2\u6570\uff0cexecute()<\/code> \u7528\u4e8e\u6267\u884c\u5220\u9664\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n\n\n\n
          \n\n\n\n
          4. \u5220\u9664\u6240\u6709\u8bb0\u5f55\uff08\u65e0\u6761\u4ef6\u5220\u9664\uff09<\/strong><\/h2>\n\n\n\n
          \u5982\u679c\u6ca1\u6709 WHERE<\/code> \u5b50\u53e5\uff0cDELETE<\/code> \u4f1a\u5220\u9664\u8868\u4e2d\u7684\u6240\u6709\u8bb0\u5f55\u3002\u8bf7\u5c0f\u5fc3\u4f7f\u7528\u6b64\u64cd\u4f5c\u3002<\/p>\n\n\n\n
          $sql = \"DELETE FROM users\";  \/\/ \u5220\u9664 users \u8868\u4e2d\u7684\u6240\u6709\u8bb0\u5f55<\/code><\/pre>\n\n\n\n
            \n
          • \u6ce8\u610f<\/strong>\uff1a\u8fd9\u4f1a\u6e05\u7a7a\u6574\u4e2a\u8868\u7684\u6570\u636e\uff0c\u4f46\u4e0d\u4f1a\u5220\u9664\u8868\u672c\u8eab\u3002\u5982\u679c\u5e0c\u671b\u5220\u9664\u8868\u672c\u8eab\uff0c\u8bf7\u4f7f\u7528 DROP TABLE<\/code>\u3002<\/li>\n<\/ul>\n\n\n\n
            \n\n\n\n
            5. \u4f7f\u7528 LIMIT \u9650\u5236\u5220\u9664\u7684\u8bb0\u5f55<\/strong><\/h2>\n\n\n\n
            \u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u60a8\u53ef\u80fd\u53ea\u60f3\u5220\u9664\u8868\u4e2d\u7684\u90e8\u5206\u8bb0\u5f55\u3002\u53ef\u4ee5\u4f7f\u7528 LIMIT<\/code> \u5b50\u53e5\u6765\u9650\u5236\u5220\u9664\u7684\u8bb0\u5f55\u6570\uff1a<\/p>\n\n\n\n
            $sql = \"DELETE FROM users WHERE age > 30 LIMIT 3\";  \/\/ \u5220\u9664\u5e74\u9f84\u5927\u4e8e 30 \u7684\u6700\u591a 3 \u6761\u8bb0\u5f55<\/code><\/pre>\n\n\n\n
              \n
            • \u8fd9\u5c06\u5220\u9664 age > 30<\/code> \u7684\u6700\u591a 3 \u6761\u8bb0\u5f55\u3002<\/li>\n<\/ul>\n\n\n\n
              \n\n\n\n
              6. \u4f7f\u7528\u4e8b\u52a1\u5904\u7406\u5220\u9664\u591a\u6761\u8bb0\u5f55<\/strong><\/h2>\n\n\n\n
              \u5f53\u4f60\u8fdb\u884c\u591a\u6b21\u5220\u9664\u64cd\u4f5c\u65f6\uff0c\u4f7f\u7528\u4e8b\u52a1\uff08BEGIN<\/code>, COMMIT<\/code>, ROLLBACK<\/code>\uff09\u662f\u4e00\u4e2a\u597d\u4e60\u60ef\uff0c\u786e\u4fdd\u6570\u636e\u7684\u4e00\u81f4\u6027\u3002<\/p>\n\n\n\n
              <?php\n$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    \/\/ \u5f00\u59cb\u4e8b\u52a1\n    $pdo->beginTransaction();\n\n    \/\/ \u5220\u9664\u8bb0\u5f55\n    $pdo->exec(\"DELETE FROM users WHERE age < 20\");\n    $pdo->exec(\"DELETE FROM users WHERE age > 60\");\n\n    \/\/ \u63d0\u4ea4\u4e8b\u52a1\n    $pdo->commit();\n\n    echo \"\u8bb0\u5f55\u5220\u9664\u6210\u529f\";\n} catch (PDOException $e) {\n    \/\/ \u51fa\u9519\u65f6\u56de\u6eda\u4e8b\u52a1\n    $pdo->rollBack();\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
              • beginTransaction()<\/code><\/strong>\uff1a\u5f00\u59cb\u4e8b\u52a1\u3002<\/li>\n\n\n\n
              • commit()<\/code><\/strong>\uff1a\u63d0\u4ea4\u4e8b\u52a1\uff0c\u5220\u9664\u8bb0\u5f55\u3002<\/li>\n\n\n\n
              • rollBack()<\/code><\/strong>\uff1a\u5982\u679c\u51fa\u73b0\u9519\u8bef\uff0c\u56de\u6eda\u4e8b\u52a1\uff0c\u53d6\u6d88\u5220\u9664\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n\n\n\n
                \n\n\n\n
                7. \u5220\u9664\u8bb0\u5f55\u540e\u8fd4\u56de\u53d7\u5f71\u54cd\u7684\u884c\u6570<\/strong><\/h2>\n\n\n\n
                \u901a\u5e38\u4f60\u53ef\u80fd\u9700\u8981\u77e5\u9053\u6709\u591a\u5c11\u6761\u8bb0\u5f55\u88ab\u5220\u9664\u3002\u4f60\u53ef\u4ee5\u901a\u8fc7 affected_rows<\/code>\uff08MySQLi<\/code>\uff09\u6216 rowCount()<\/code>\uff08PDO<\/code>\uff09\u6765\u83b7\u53d6\u3002<\/p>\n\n\n\n
                MySQLi<\/strong>\uff1a<\/h4>\n\n\n\n
                if ($conn->query($sql) === TRUE) {\n    echo $conn->affected_rows . \" \u884c\u8bb0\u5f55\u88ab\u5220\u9664\";\n}<\/code><\/pre>\n\n\n\n
                PDO<\/strong>\uff1a<\/h4>\n\n\n\n
                echo $stmt->rowCount() . \" \u884c\u8bb0\u5f55\u88ab\u5220\u9664\";<\/code><\/pre>\n\n\n\n
                \n\n\n\n
                8. \u5220\u9664\u524d\u7684\u5b89\u5168\u68c0\u67e5<\/strong><\/h2>\n\n\n\n
                  \n
                • \u786e\u4fdd\u5220\u9664\u64cd\u4f5c\u662f\u6709\u6761\u4ef6\u7684\u3002\u672a\u52a0 WHERE<\/code> \u5b50\u53e5\u7684 DELETE<\/code> \u4f1a\u5220\u9664\u6240\u6709\u8bb0\u5f55\u3002<\/li>\n\n\n\n
                • \u5efa\u8bae\u5bf9\u5220\u9664\u64cd\u4f5c\u8fdb\u884c\u786e\u8ba4\uff0c\u4ee5\u9632\u6b62\u8bef\u64cd\u4f5c\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u6dfb\u52a0\u4e00\u4e2a\u786e\u8ba4\u63d0\u793a\u6216\u65e5\u5fd7\u8bb0\u5f55\u3002<\/li>\n<\/ul>\n\n\n\n
                  \n\n\n\n
                  \u603b\u7ed3<\/strong><\/h3>\n\n\n\n
                    \n
                  • DELETE<\/code> \u7528\u4e8e\u5220\u9664\u8868\u4e2d\u7684\u8bb0\u5f55\uff0c\u5fc5\u987b\u8c28\u614e\u4f7f\u7528\u3002<\/li>\n\n\n\n
                  • \u4f7f\u7528 WHERE<\/code> \u5b50\u53e5\u6765\u9650\u5b9a\u5220\u9664\u6761\u4ef6\uff0c\u5426\u5219\u6240\u6709\u8bb0\u5f55\u90fd\u4f1a\u88ab\u5220\u9664\u3002<\/li>\n\n\n\n
                  • \u4f7f\u7528\u9884\u5904\u7406\u8bed\u53e5\uff08PDO<\/code> \u6216 MySQLi<\/code>\uff09\u53ef\u4ee5\u9632\u6b62 SQL \u6ce8\u5165\u3002<\/li>\n\n\n\n
                  • \u53ef\u4ee5\u7ed3\u5408 LIMIT<\/code> \u6765\u5220\u9664\u90e8\u5206\u8bb0\u5f55\uff0c\u6216\u8005\u4f7f\u7528\u4e8b\u52a1\u6765\u4fdd\u8bc1\u64cd\u4f5c\u7684\u539f\u5b50\u6027\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":"
                    DELETE \u8bed\u53e5\u7528\u4e8e\u5220\u9664 MySQL \u6570\u636e\u5e93\u4e2d\u7684\u4e00\u6761\u6216\u591a\u6761\u8bb0\u5f55\u3002\u5728 PHP \u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7 MySQLi  […]<\/p>\n","protected":false},"author":1,"featured_media":3119,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[80],"tags":[],"class_list":["post-3118","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\/3118","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=3118"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3118\/revisions"}],"predecessor-version":[{"id":3120,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3118\/revisions\/3120"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media\/3119"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=3118"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=3118"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=3118"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}