<!--php代码--> <?php //连接数据库 $conn = mysqli_connect('localhost', 'root', '123456', 'student'); //判断表单是否点击下载按钮 if (isset($_POST['dow'])) { //请求下载代码 header("Content-type: application/vnd.ms-excel; charset=utf-8"); Header("Content-Disposition: attachment; filename=student.csv"); //通过数据库连接查询所要下载的表信息 $res = mysqli_query($conn, 'select number,name,sex,age from student join class on student.class=class.id order by number asc'); if ($res && mysqli_num_rows($res) > 0) { while ($row = mysqli_fetch_assoc($res)) { $row['sex'] == '1' ? $row['sex'] = "男" : $row['sex'] = "女"; $arr[] = $row; } } echo "学号,姓名,性别,年龄" . " "; foreach ($arr as $item) { echo implode(',', $item) . " "; }; die; } //自定义一个数据插入数据库函数 function add($table, $data) { global $conn; $sql = "INSERT INTO `$table`"; $sql .= " (`" . implode("`,`", array_keys($data)) . "`)"; $sql .= " VALUES ('" . implode("','", $data) . "')"; $result = mysqli_query($conn, $sql); if ($result && mysqli_insert_id($conn) > 0) { return mysqli_insert_id($conn); } else { return 0; } }; //判断是否点击提交上传按钮并且上传文件不为空 if (isset($_POST['sub']) && ！empty($_FILES['file'])) { //读取上传文件内容 $con = file($_FILES['push']['tmp_name']); //去除字段名再重组新数组 foreach ($con as $key => $item) { if ($key == 0) { continue; } $arr[] = explode(',', $item); } //去掉主键将数据保存为字段对应的关联数组 foreach ($arr as $k => $v) { $arr[] = explode(',', $item); $arr1[$k] = [ 'name' => $v[1], 'sex' => $v[2] == '男' ? '1' : '0', 'age' => $v[3], ]; } //遍历二维数组将得到的一维关联数组依次插入数据库 foreach ($arr1 as $a) { $res = add('student', $a); } if ($res) { echo "<script>alert('导入数据成功！')</script>"; } else { echo "<script>alert('导入数据失败！')</script>"; } } ?> <!--html代码--> <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <form action="" method="post" enctype="multipart/form-data"> <button name="dow">点击下载</button> <input type="file" name="push" value=""> <input type="submit" name="sub" value="上传数据"> </form> </body> </html>