<?php // 连接数据库 $conn = new mysqli("localhost", "root", "123456", "wyya"); // 检查连接是否成功 if ($conn->connect_error) { die("连接失败: " . $conn->connect_error); } // 查询数据 $tables = array("one_list", "two_list", "three_list", "four_list", "five_list"); $data = array(); foreach ($tables as $table) { $sql = "SELECT * FROM " . $table; $result = mysqli_query($conn, $sql); if ($result->num_rows > 0) { while ($row = $result->fetch_assoc()) { $row['语种'] = substr($table, 0, -5); // 获取语种名称 $data[] = $row; } } } // 渲染 HTML 模板 ?> <!DOCTYPE html> <html> <head> <title>网易云音乐歌单</title> <style> table { border-collapse: collapse; width: 100%; } th, td { text-align: left; padding: 8px; } tr:nth-child(even) { background-color: #f2f2f2; } th { background-color: #4CAF50; color: white; } .language-button { background-color: #f2f2f2; padding: 8px 16px; border: none; cursor: pointer; display: inline-block; margin-right: 10px; } .chinese { color: #e60000; } .english { color: #0066cc; } .japanese { color: #ff9900; } .korean { color: #3385ff; } .cantonese { color: #009933; } </style> </head> <body> <div> <h2>网易云音乐歌单</h2> <div> <form method="get" action=""> <input type="hidden" name="table" value="<?php echo $tables[0]; ?>"> <button type="submit" class="language-button chinese">华语</button> </form> <form method="get" action=""> <input type="hidden" name="table" value="<?php echo $tables[1]; ?>"> <button type="submit" class="language-button english">英语</button> </form> <form method="get" action=""> <input type="hidden" name="table" value="<?php echo $tables[2]; ?>"> <button type="submit" class="language-button japanese">日语</button> </form> <form method="get" action=""> <input type="hidden" name="table" value="<?php echo $tables[3]; ?>"> <button type="submit" class="language-button korean">韩语</button> </form> <form method="get" action=""> <input type="hidden" name="table" value="<?php echo $tables[4]; ?>"> <button type="submit" class="language-button cantonese">粤语</button> </form> </div> </div> <?php if (!empty($data)) { ?> <table> <tbody> <tr> <th>歌单名</th> <th>歌单地址</th> <th>歌曲量</th> <th>播放量</th> <th>收藏量</th> <th>评论量</th> <th>分享量</th> <th>创建者</th> <th>创建时间</th> </tr> <?php foreach ($data as $row) { ?> <tr> <td><?php echo $row['歌单名']; ?></td> <td><a href="<?php echo $row['歌单地址']; ?>" target="_blank"><?php echo $row['歌单地址']; ?></a></td> <td><?php echo $row['歌曲量']; ?></td> <td><?php echo $row['播放量']; ?></td> <td><?php echo $row['收藏量']; ?></td> <td><?php echo $row['评论量']; ?></td> <td><?php echo $row['分享量']; ?></td> <td><?php echo $row['创建者']; ?></td> <td><?php echo $row['创建时间']; ?></td> </tr> <?php } ?> </tbody> </table> <?php } else { ?> <p>暂无数据</p> <?php } ?> </body> </html> <?php // 关闭连接 $conn->close()0>修改代码，通过点击按钮展示出对应的单个歌单

<?php // 连接到数据库 $conn = mysqli_connect("localhost", "root", "123456", "exam"); // 检查连接是否成功 if (!$conn) { die("连接失败: " . mysqli_connect_error()); } // 获取要删除行的id $id = $_GET["id"]; // 构建 SQL 删除语句 $sql = "DELETE FROM books WHERE id=$id"; // 执行 SQL 删除语句 if (mysqli_query($conn, $sql)) { echo "数据已成功删除"; } else { echo "删除数据失败: " . mysqli_error($conn); } // 关闭连接 mysqli_close($conn); ?>这段代码的错误在哪？

$conn = mysqli_connect("localhost", "root", "123456", "exam"); // 检查连接是否成功 if (!$conn) { die("连接失败: " . mysqli_connect_error()); } // 获取要删除行的id $id = mysqli_real_escape_string($...

检查这段代码的错误并修改实现与bookshelf.php的跳转<?php //连接数据库 $servername = "127.0.0.12"; $username = "roots"; $password = "1234root"; $dbname = "zkw"; $conn = mysqli_connect($servername, $username, $password, $dbname); if (!$conn) { die("连接失败: " . mysqli_connect_error()); } //查询图书分类 $sql = "SELECT * FROM categories"; $result = mysqli_query($conn, $sql); mysqli_close($conn); //跳转到bookshelf.php页面 header("Location: bookshelf.php"); ?> <!DOCTYPE html> <html> <head> <title>图书分类</title> </head> <body> 图书分类 <?php while ($row = mysqli_fetch_assoc($result)) { ?> "><?php echo $row["name"]; ?> <?php } ?> </body> </html>

//连接数据库 $servername = "127.0.0.12"; $username = "roots"; $password = "1234root"; $dbname = "zkw"; $conn = mysqli_connect($servername, $username, $password, $dbname); if (!$conn) { die("连接...

<?php // 连接数据库 $conn = new mysqli("localhost", "root", "123456", "wyya"); // 检查连接是否成功 if ($conn->connect_error) { die("连接失败: " . $conn->connect_error); } // 查询五个歌单的表 $tables = array(); $result = mysqli_query($conn, "SHOW TABLES LIKE '%_list'"); if ($result->num_rows > 0) { while ($row = mysqli_fetch_array($result)) { $tables[] = $row[0]; } } // 获取选中的歌单表 $tableName = isset($_GET["table"]) ? $_GET["table"] : ""; $data = array(); if (!empty($tableName)) { $result = mysqli_query($conn, "SELECT * FROM $tableName"); if ($result->num_rows > 0) { while ($row = $result->fetch_assoc()) { $data[] = $row; } } } ?> <!DOCTYPE html> <html> <head> <title>网易云音乐歌单</title> <style> table { border-collapse: collapse; width: 100%; } th, td { text-align: left; padding: 8px; } tr:nth-child(even) { background-color: #f2f2f2; } th { background-color: #4CAF50; color: white; } </style> </head> <body> 网易云音乐歌单 华语 欧美 日语 韩语 粤语 <?php if (!empty($tableName)) { ?> <?php $columns = mysqli_query($conn, "SHOW COLUMNS FROM $tableName"); if ($columns->num_rows > 0) { while ($column = mysqli_fetch_array($columns)) { ?> <?php echo $column["Field"]; ?> <?php } } ?> <?php foreach ($data as $row) { ?> <?php foreach ($row as $value) { ?> <?php echo $value; ?> <?php } ?> <?php } ?> <?php } ?> </body> </html> <?php // 关闭连接 $conn->close(); ?>修改代码，将华语，欧美，日语，韩语，粤语放入一个命名为分类的菜单中，实现点击菜单后点击华语，欧美，日语，韩语，粤语再跳转

$conn = new mysqli("localhost", "root", "123456", "wyya"); // 检查连接是否成功 if ($conn->connect_error) { die("连接失败: " . $conn->connect_error); } // 查询五个歌单的表 $tables = array(); $result...

这是我连接数据库的代码<?php function getConn() { $host = "localhost"; $user = "root"; $password = "12345678"; $database = "cwyy"; //连接数据库 $conn = mysqli_connect($host, $user, $password, $database); if ($conn->error) { die("连接数据库[$database]失败！"); } return $conn; } ?>

你的连接数据库的代码看起来没有问题，但是建议在连接数据库之前，先检查一下 mysqli_connect 函数是否返回了错误，以便及时发现问题。你可以尝试在连接数据库之前添加以下代码： $conn = mysqli_connect($...

美化这个用户界面<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Personal Information</title> </head> <body> Personal Information <?php // 连接到MySQL数据库 $conn = new mysqli('localhost', 'root', '123456', 'students'); if ($conn->connect_error) { die("Connection failed: " . $conn->connect_error); } // 从数据库中检索用户信息 $sql = "SELECT name, part, sex FROM info"; $result = $conn->query($sql); // 在用户界面上显示用户信息 if ($result->num_rows > 0) { echo "NamePartSex"; while ($row = $result->fetch_assoc()) { echo "".$row["name"]."".$row["part"]."".$row["sex"].""; } echo ""; } else { echo "No users found."; } // 关闭数据库连接 $conn->close(); ?> </body> </html>

$conn = new mysqli('localhost', 'root', '123456', 'students'); if ($conn->connect_error) { die("Connection failed: " . $conn->connect_error); } // 从数据库中检索用户信息 $sql = "SELECT ...

<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <meta http-equiv="content-type" content="text/html; charset=utf-8"> <title>数据库显示</title> </head> <body> id名字年龄性别 <?php // 数据库连接参数 $servername = "127.0.0.1"; $username = "shuanglian"; $password = "cw6636878"; $dbname = "erp"; // 创建数据库连接 $conn = new mysqli($servername, $username, $password, $dbname); // 检查连接是否成功 if ($conn->connect_error) { die("连接失败: " . $conn->connect_error); } // 查询数据 $sql = "SELECT * FROM test"; $result = $conn->query($sql); // 检查是否有数据 if ($result->num_rows > 0) { // 输出数据 while($row = $result->fetch_assoc()) { echo "ID: " . $row["name"]. " - Name: " . $row["vcode"]. "
"; } } else { echo "没有数据"; } // 关闭数据库连接 $conn->close(); ?> </body> </html>

您提供的代码看起来基本正确，它...此外，确保数据库连接参数（$servername，$username，$password和$dbname）与您的实际数据库连接参数匹配。如果您仍然遇到问题，请提供错误信息或详细说明以供进一步帮助。

检查这段代码的错误并修改实现与book.php的跳转<?php header("Location: book.php"); //连接数据库 $servername = "127.0.0.12"; $username = "roots"; $password = "1234root"; $dbname = "zkw"; $conn = mysqli_connect($servername, $username, $password, $dbname); if (!$conn) { die("连接失败: " . mysqli_connect_error()); } //查询图书 $id = $_GET["id"]; $sql = "SELECT * FROM books WHERE id=$id"; $result = mysqli_query($conn, $sql); $row = mysqli_fetch_assoc($result); //检查用户是否登录 session_start(); if (!isset($_SESSION["username"])) { $bookshelf_text = "登录后可以添加到书架"; } else { $username = $_SESSION["username"]; $sql = "SELECT * FROM bookshelf WHERE username='$username' AND book_id=$id"; $result = mysqli_query($conn, $sql); if (mysqli_num_rows($result) > 0) { $bookshelf_text = "从书架中移除"; } else { $bookshelf_text = "添加到书架"; } } mysqli_close($conn); ?> <!DOCTYPE html> <html> <head> <title><?php echo $row["name"]; ?></title> </head> <body> <?php echo $row["name"]; ?> <?php echo $row["description"]; ?> <?php echo $bookshelf_text; ?> </body> </html>

//检查用户是否登录 session_start(); if (!isset($_SESSION["username"])) { $bookshelf_text = "登录后可以添加到书架"; } else { $username = $_SESSION["username"]; $sql = "SELECT * FROM bookshelf WHERE ...

<?php // 连接数据库 $conn = mysqli_connect("localhost", "your_username", "your_password", "your_database"); // 检查连接是否成功 if (!$conn) { die("数据库连接失败: " . mysqli_connect_error()); } // 处理表单提交 if ($_SERVER["REQUEST_METHOD"] == "POST") { // 获取表单数据 $aoiStep = $_POST["aoiStep"]; $defectType = $_POST["defectType"]; $layerCode = $_POST["layerCode"]; // 其他字段... // 执行插入操作 $sql = "INSERT INTO your_table_name (aoiStep, defectType, layerCode, ...) VALUES ('$aoiStep', '$defectType', '$layerCode', ...)"; if (mysqli_query($conn, $sql)) { echo "数据插入成功"; } else { echo "数据插入失败: " . mysqli_error($conn); } } // 关闭数据库连接 mysqli_close($conn); ?>在这个语句中，我数据库的字段命名是aoi_step, defect_type, layer_code, type, dpet, subcode, code_description, image1_path, image2_path, image3_path, image4_path, image5_path, determination_rule，但是我网页表头命名是aoiStep, defectType, layerCode, type, dpet, subcode, codeDescription, image1, image2, image3, image4, image5, determinationRule，我需要怎么修改

// 检查连接是否成功 if (!$conn) { die("数据库连接失败: " . mysqli_connect_error()); } // 处理表单提交 if ($_SERVER["REQUEST_METHOD"] == "POST") { // 获取表单数据 $aoiStep = $_POST["aoiStep"]; $...

<?php $servername = "localhost"; $username = "yourusername"; $password = "yourpassword"; $dbname = "yourdatabase"; // 创建连接 $conn = new mysqli($servername, $username, $password, $dbname); // 检查连接是否成功 if ($conn->connect_error) { die("连接失败: " . $conn->connect_error); } // 获取表单提交的用户名和密码 $username = $_POST['username']; $password = $_POST['password']; // 查询用户表中是否存在该用户 $sql = "SELECT * FROM users WHERE username='$username' AND password='$password'"; $result = $conn->query($sql); // 判断查询结果是否为空 if ($result->num_rows > 0) { echo "登录成功！"; } else { echo "用户名或密码错误！"; } // 关闭连接 $conn->close(); ?> 使用密码哈希加密

// 检查连接是否成功 if ($conn->connect_error) { die("连接失败: " . $conn->connect_error); } // 获取表单提交的用户名和密码 $username = $_POST['username']; $password = $_POST['password']; // 使用密码...

dmin_personnel id,int,password,varchar,name,varchar,role,varchar,department,varchar,sex,varchar,email,varchar,telephon,varchar添加admin_personnel表数据，下面代码错误在哪 <?php // 连接数据库 include "conn.php"; // 获取请求参数 $id = $_POST['id']; $name = $_POST['name']; $password = $_POST['password']; $sex = $_POST['sex']; $role = $_POST['role']; $department = $_POST['department']; $email = $_POST['email']; $telephone = $_POST['telephone']; // 创建预处理语句 $stmt = mysqli_prepare($conn, "INSERT INTO admin_personnel (id, name, password, sex, role, department,email,telephone) VALUES (?, ?, ?, ?, ?, ?, ?, ?)"); mysqli_stmt_bind_param($stmt, "isssssss", $id, $name, $password, $sex, $role, $department, $email, $telephone); // 执行预处理语句 if (mysqli_stmt_execute($stmt)) { // 获取插入数据的ID $insert_id = mysqli_insert_id($conn); // 查询插入的数据 $result = mysqli_query($conn, "SELECT * FROM admin_personnel WHERE id=\"$insert_id\""); $row = mysqli_fetch_assoc($result); // 返回响应数据 $response = array( "data" => $row, "meta" => array( "msg" => "用户创建成功", "status" => 201 ) ); echo json_encode($response); } else { // 返回错误信息 $response = array( "meta" => array( "msg" => "用户创建失败", "status" => 500 ) ); echo json_encode($response); } // 关闭连接 mysqli_stmt_close($stmt); mysqli_close($conn); ?>

// 连接数据库 include "conn.php"; // 获取请求参数 $id = $_POST['id']; $name = $_POST['name']; $password = $_POST['password']; $sex = $_POST['sex']; $role = $_POST['role']; $department = $_POST['...

为什么每刷新一次，数据库都会自动添加一条代码 <?php // 包括数据库连接代码 include_once("functions/database.php"); // 创建MySQLi连接 $conn = mysqli_connect("localhost", "root", "root", "news"); if (!$conn) { die("连接失败：" . mysqli_connect_error()); } // 查询 category 表中的所有数据 $query = "SELECT * FROM category"; $result = mysqli_query($conn, $query); if (!$result) { die("查询失败：" . mysqli_error($conn)); } // 显示查询结果 echo ""; echo "category_idcategory_namecategory_description"; while ($row = mysqli_fetch_assoc($result)) { echo "" . $row["category_id"] . "" . $row["category_name"] . "" . $row["category_description"] . ""; } echo ""; mysqli_free_result($result); mysqli_close($conn); ?>

$conn = mysqli_connect("localhost", "root", "root", "news"); if (!$conn) { die("连接失败：" . mysqli_connect_error()); } // 检查数据是否已存在 $stmt = mysqli_prepare($conn, "SELECT * FROM ...

<?php $bookid = $_POST["book id"]; $conn=mysqli connect("localhost","root", "root","books"); if($conn)($sql =$result = mysqli query($conn, $sql)://执行查询 .//查询结果集的处理此处从略?>

$conn = mysqli_connect("localhost", "root", "root", "books"); if ($conn) { $sql = "SELECT * FROM books WHERE id = $bookid"; $result = mysqli_query($conn, $sql); //执行查询，得到结果集 //查询结果集...

找出这串代码的错误并给出正确答案<?php $servername = "127.0.0.1"; $username = "root"; $password = "123456"; $dbname="stu_result"; $conn=new mysqli($servername,$username,$password,$dbname); @mysqli_set_charset($conn,utf8); if($conn->connect_error) { die("连接失败：" . $conn->connect_error); } ?>

因为 mysqli_set_charset() 函数需要一个有效的数据库连接作为参数，而 $conn 变量是在 mysqli() 函数中创建的。修改后的代码如下： php $conn = new mysqli($servername, $username, $password, $dbname); if ...

找出这串代码的错误并给出正确答案<?php $servername = "127.0.0.1"; $username = "root"; $password = "123456" $dbname="stu_result"; $conn = new mysqli($servername,$username,$password,$dbname); @mysqli_set_charset($conn,utf8); if($conn->connect_eorror) { die("连接失败：" . $conn->connect_error); } ?>

$conn = new mysqli($servername, $username, $password, $dbname); @mysqli_set_charset($conn, "utf8"); // 加上双引号 if ($conn->connect_error) { die("连接失败：" . $conn->connect_error); } ?>

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