如何对从数据库中获取的数据分页

Question

假设在第一页中有13条记录，第二页是4-8条，第三页是1-3条。

我试过了，但只限于第一页

<?php
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "mysqli_login";

// Create connection
$connection= new mysqli($servername, $username, $password, $dbname);
$query = mysqli_query($connection, "SELECT name,submittedby,trn_date FROM new_record ORDER BY id DESC LIMIT 5")or die(mysqli_error($connection));
while ($row = mysqli_fetch_array($query)) {
    $fileName = $row['name'];
    $fileContents = file_get_contents("txt/$fileName");
    $poster = $row['submittedby'];
    $date = $row['trn_date'];
    echo ("posted by :$poster  |  posted date : $date");
    echo ("$fileContents");
}
?>

Answer 1

您的代码应该是这样的

<?php
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "test_db";

// Create connection
$connection= new mysqli($servername, $username, $password, $dbname);

$current_page = 1; // 1=>refer to the first page, 2=> second page and so on..
if(!empty($_GET['page_no']){
$current_page = $_GET['page_no'];
}

$to = "5"; // it is no of record which you wants to show on each page, you can change it's value as per your need.
$from = ($current_page - 1) * $to;


$query = mysqli_query($connection, "SELECT name,submittedby,trn_date FROM new_record ORDER BY id DESC LIMIT $from , $to")or die(mysqli_error($connection));
while ($row = mysqli_fetch_array($query)) {
    $fileName = $row['name'];
    $fileContents = file_get_contents("txt/$fileName");
    $poster = $row['submittedby'];
    $date = $row['trn_date'];
    echo ("posted by :$poster  |  posted date : $date");
    echo ("$fileContents");
}
?>

您的url应该类似于no=1，将"http://localhost/projects/“替换为实际的url。

希望这会有帮助！！

Answer 2

下面是一篇讨论这个主题的文章。您需要根据当前页面来偏移查询。所以它将是LIMIT 5 OFFSET <amount based on the page>。