How to get adjacent page numbers in PHP array paging?

Get adjacent page numbers in PHP: Use the range() function to generate continuous values ​​within a specific range, based on the current page number and the number of adjacent page numbers. Write a custom function to handle the generation of adjacent page numbers and return a range.

PHP Array Pagination: Get adjacent page numbers

In a paging system, displaying adjacent page numbers is crucial to user experience . This article will introduce how to obtain adjacent page numbers in PHP and provide a practical case.

Method 1: Use the standard library

PHP provides a range() function that can generate a continuous value within a specified range. We can use this function to get adjacent page numbers.

<?php

$currentPage = 2; // 当前页码
$totalPages = 10; // 总页数
$adjacentPages = 2; // 显示的相邻页码数

$startPage = max(1, $currentPage - $adjacentPages);
$endPage = min($totalPages, $currentPage + $adjacentPages);

$pageNumbers = range($startPage, $endPage);

Method 2: Custom function

We can write a custom function to handle the generation of adjacent page numbers.

<?php

function getAdjacentPages($currentPage, $totalPages, $adjacentPages) {
  $startPage = max(1, $currentPage - $adjacentPages);
  $endPage = min($totalPages, $currentPage + $adjacentPages);

  return range($startPage, $endPage);
}

Practical case

The following is an example of paging navigation using adjacent page numbers:

<?php

$currentPage = 2;
$totalPages = 10;
$adjacentPages = 2;

$pageNumbers = getAdjacentPages($currentPage, $totalPages, $adjacentPages);

echo "<ul>";
foreach ($pageNumbers as $pageNumber) {
  echo "<li><a href='page-$pageNumber.php'>$pageNumber</a></li>";
}
echo "</ul>";

In this example, if$ currentPage is 2, the following page number will be generated:

[1, 2, 3, 4, 5]

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