ページネーション - 見えるページ番号を制限する

Question

私は約10 000製品を持っています。ここにはがあります。その結果、ページあたり10個の製品が表示され、1000ページが表示されます。自体は完璧に動作し

Previous | 1 | 101 | 102 | 103 | 104 | ... | 1000 | Next 

ページネーション：

は、このような理由のために、私は以下のページネーションサンプルのように示されたページ数の制限をしたいと思います。表示されているページの制限のみが問題です。

ここにコードがあります。

DATABASE：

try { 
$conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password); 
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); 

/* CONFIGURE PAGINATION */ 

/* 
Set default page value to 0 
*/ 

$current_page = 0; 

/* 
If $_GET['start'] exists, is a valid integer and is positive set $current_page to this value 
*/ 

if (isset($_GET['start']) && is_int($_GET['start']) && $_GET['start'] >= 0) { 
    $current_page = $_GET['start']; 
    $current_page = $current_page * $max_rows; 
} 

/* 
Set $max_rows to the number of records you want to show on each page 
*/ 

$max_rows = 10; 

/* 
Set default values for pagination variables 
*/ 

$total_rows = 0; 
$total_pages = 1; 
$prev_page = 0; 
$next_page = 0; 
$page_from = 1; 
$page_to = 0; 

// query to get messages from messages table 
$connOne = "SELECT product_name, product_quantity, product_id, product_price_lowest, product_price_highest FROM product ORDER BY product_price_lowest ASC, product_price_highest DESC LIMIT $current_page,  

$max_rows"; 
$stmt = $conn->prepare($connOne); 
$stmt->execute(); 

if($stmt->rowCount() > 0){ 
    $result = $stmt->fetchAll(PDO::FETCH_OBJ); 
} 

/* 
Your original row count query 
*/ 

$count_query = "SELECT product_name, product_quantity, product_id, product_price_lowest, product_price_highest FROM product"; 
$stmt = $conn->prepare($count_query); 
$stmt->execute(); 

$total_rows = $stmt->rowCount(); 

/* 
Set $total_pages to ceiling of row count/max rows 
*/ 

$total_pages = ceil($total_rows/$max_rows); 

/* 
If $current_page is higher than total pages, reset to $total_pages 
*/ 

if ($current_page > $total_pages) $current_page = $total_pages; 

/* 
Set variables to control which page numbers are shown 
*/ 

$page_to = $total_pages; 
    if ($current_page > 1) $prev_page = $current_page - 1; 
    if ($total_pages > $current_page) $next_page = $current_page + 1; 
    if ($total_pages > 5) { 
    if (($current_page - 3) > 1) $page_from = $current_page - 3; 
    if (($current_page + 3) < $total_pages) $page_to = $current_page + 3; 
} 
} 

catch(PDOException $e) { 
echo "Error: " . $e->getMessage(); 
    } 

$conn = null; 
?> 

ページ出力：

<?php 
/* OUTPUT TO PAGE */ 

/* 
Check that we've actually got some records, although I assume you're 
doing this elsewhere 
*/ 

if ($total_rows > 0) { 
echo '<ul>'; 

/* 
If we're not on the first page show a link to page 1 and an ellipsis 
*/ 

if ($prev_page > 0) { 
echo '<li><a href="?page=' . $prev_page . '">Previous</a></li>'; 
} 
if ($page_from != 0) { 
echo '<li><a href="?page=0">First</a></li>'; 
echo '<li><span>. . . </span></li>'; 
} 

/* 
Loop through the page numbers that we're showing and set class="active" on the current page 
*/ 

for ($p = $page_from; $p <= $page_to; $p++) { 
echo '<li' . ($current_page == $p ? ' class="active"' : '') . '> <a href=?page=' . $p . '>' . $p . '</a> </li>'; 
} 

/* 
If we're not on the last page show an ellipsis and a link to the last page 
*/ 

if ($page_to != $total_pages) { 
echo '<li><span> . . . </span></li>'; 
echo '<li><a href="?page=' . $total_pages . '">' . $total_pages . '</a></li>'; 
} 

if ($next_page > 0) { 
echo '<li><a href="?page=' . $next_page . '">Next</a></li>'; 
} 

echo '</ul>'; 

} else { 
echo 'No records.'; 
} 

Answer 1

私はあなたがビットのカップルと少し混乱しましたと思います。これを試してください - あなたの更新された投稿のコードを編集しました。物を微調整するコードを編集する前に、私がここに投稿したものでどのような結果が得られるかを見てください。

$_GET['start']を$_GET['page']に置き換えました。 $_GET['page']はページ番号になり、ではなく、の開始行になります。

DATABASE：

<?php 


try { 

$conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password); 
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); 



/* 
Set default page value to 1 
*/ 

$current_page = 1; 

/* 
If $_GET['start'] exists, is a valid integer and is positive set $current_page to this value 
*/ 

if (isset($_GET['page']) && is_int($_GET['page']) && $_GET['page'] >= 0) { 
    $current_page = $_GET['page']; 
} 

/* 
Set $max_rows to the number of records you want to show on each page 
*/ 

$max_rows = 10; 


/* 
Set default values for pagination variables - don't change this 
*/ 
$total_rows = 0; 
$total_pages = 1; 
$prev_page = 0; 
$next_page = 0; 
$page_from = 1; 
$page_to = 0; 

/* 
Your original row count query 
*/ 

$count_query = "SELECT product_name, product_quantity, product_id, product_price_lowest, product_price_highest FROM product"; 
$stmt = $conn->prepare($count_query); 
$stmt->execute(); 

$total_rows = $stmt->rowCount(); 

/* 
Set $total_pages to ceiling of row count/max rows 
*/ 

$total_pages = ceil($total_rows/$max_rows); 

/* 
If $current_page is higher than total pages, reset to $total_pages 
*/ 
if ($current_page > $total_pages) $current_page = $total_pages; 


/* 
Set start row for DB query 
*/ 
$db_start_row = ($current_page * $max_rows) - $max_rows; 

// query to get messages from messages table 
$connOne = "SELECT product_name, product_quantity, product_id, product_price_lowest, product_price_highest FROM product ORDER BY product_price_lowest ASC, product_price_highest DESC LIMIT $db_start_row, $max_rows"; 
$stmt = $conn->prepare($connOne); 
$stmt->execute(); 

if($stmt->rowCount() > 0){ 
    $result = $stmt->fetchAll(PDO::FETCH_OBJ); 
} 

/* 
Set variables to control which page numbers are shown 
*/ 

$page_to = $total_pages; 
    if ($current_page > 1) $prev_page = $current_page - 1; 
    if ($total_pages > $current_page) $next_page = $current_page + 1; 
    if ($total_pages > 5) { 
    if (($current_page - 2) > 1) $page_from = $current_page - 2; 
    if (($current_page + 2) < $total_pages) $page_to = $current_page + 2; 
} 
} 

catch(PDOException $e) { 
echo "Error: " . $e->getMessage(); 
    } 

$conn = null; 
?> 

ページ出力：

<?php 


/* 
* Check that we've actually got some records, although 
* I assume you're doing this elsewhere 
*/ 
if ($total_rows > 0) { 

    echo '<ul>'; 

    /* 
    * If we're not on the first page show a link to page 1 and an ellipsis 
    */ 
    if ($prev_page > 0) { 
     echo '<li><a href="?page=' . $prev_page . '">Previous</a></li>'; 
    } 
    if ($page_from != 1) { 
     echo '<li><a href="?page=1">1</a></li>'; 
     echo '<li><span>...</span></li>'; 
    } 

    /* 
    * Loop through the page numbers that we're showing and set class="active" 
    * on the current page 
    */ 
    for ($p = $page_from; $p <= $page_to; $p++) { 
     echo '<li' . ($current_page == $p ? ' class="active"' : '') . '><a href=?page=' . $p . '>' . $p . '</a></li>'; 
    } 

    /* 
    * If we're not on the last page show an ellipsis and a link to the last page 
    */ 
    if ($page_to != $total_pages) { 
     echo '<li><span>...</span></li>'; 
     echo '<li><a href="?page=' . $total_pages . '">' . $total_pages . '</a></li>'; 
    } 
    if ($next_page > 0) { 
     echo '<li><a href="?page=' . $next_page . '">Next</a></li>'; 
    } 

    echo '</ul>'; 

} else { 
    echo 'No records.'; 
} 

?>