A simple PHP function that can be used to generate pagination for use in a HTML template.

pagination.php

<?php

/**
 * Generates an array of pages that could be used in an HTML template to
 * create pagination links.
 * 
 * @param integer $page
 * @param integer $totalpages
 * @param integer $spaces (change this value if you want to display more pages, this should be an odd number)
 * 
 * @return array
 */
function pagination($page, $totalpages, $spaces = 5)
{
  // Pagination
  $pages = array();
  
  // Calculate number of items required on each side of the current page
  $sides = ($spaces - 1) / 2;
  
  // Do we need to include some pages before the current page
  if($totalpages > ($spaces+1)){
    // Calculate pages before and after
    $pagesbefore = $page - 1;
    $pagesafter = $totalpages - $page;
    
    // Is pagination weighted left?
    if($pagesbefore < $sides && $pagesafter > $sides){
      $ifrom = 1;
      $ito = $spaces;
    }
    // Is pagination center weighted?
    if($pagesbefore >= $sides && $pagesafter >= $sides){
      $ifrom = $page - $sides;
      $ito = $page + $sides;
    }
    // Is pagination weighted right?
    if($pagesbefore > $sides && $pagesafter < $sides){
      $ifrom = $totalpages - ($spaces-1);
      $ito = $totalpages;
    }
  } else {
    // Number of pages is less than or equal to the number of available 
    // spaces, we don't need to do anything
    $ifrom = 1;
    $ito = $totalpages;
  }
  
  // Generate pagination
  for($i=$ifrom; $i<=$ito; $i++){
    array_push($pages, $i);
  }
  
  // Create array to return
  $data = array(
    "currentpage" => $page,
    "totalpages" => $totalpages,
    "pagination" => $pages
  );
  
  // Return pagination
  return $data;
}

?>

paginationExamples.md

Usage Examples

Calling this:

$pagination = pagination(10, 30);

Returns this:

Array(
  "currentpage" => 10,
  "totalpages" => 30,
  "pagination" => Array(
    [0] => 8,
    [1] => 9,
    [2] => 10,
    [3] => 11,
    [4] => 12
  )
);

Calling this:

$pagination = pagination(33, 48, 11);

Returns this:

Array(
  "currentpage" => 33,
  "totalpages" => 48,
  "pagination" => Array(
    [0]  => 28,
    [1]  => 29,
    [2]  => 30,
    [3]  => 31,
    [4]  => 32,
    [5]  => 33,
    [6]  => 34,
    [7]  => 35,
    [8]  => 36,
    [9]  => 37,
    [10] => 38
  )
);