PHP + mySQL -在计数查询后获取行的共享位置

$servername = "数据库服务器地址";
$username = "数据库用户名";
$password = "数据库密码";
$dbname = "数据库名称";

$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

$sql = "SELECT COUNT(*) as count FROM 表名 WHERE 条件";
$result = $conn->query($sql);
$row = $result->fetch_assoc();
$count = $row['count'];

$start = 10; // 起始位置
$limit = 20; // 获取的行数

$sql = "SELECT * FROM 表名 WHERE 条件 LIMIT $start, $limit";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    while ($row = $result->fetch_assoc()) {
        // 处理每一行的数据
    }
} else {
    echo "没有找到符合条件的行";
}