Paging non-SQL data

Generic Array Pager (D6)

With the following function, you can use the Drupal core pager on any array with only two lines of code.

/** 
 * A generic array pager for Drupal. 
 * For Drupal 5 and 6, the default limit is 10. For Drupal 7 it is 9. 
 */
function pager_array_splice($data, $limit = 9, $element = 0) {
  global $pager_page_array, $pager_total, $pager_total_items; $page = isset($_GET['page']) ? $_GET['page'] : '';
  // Convert comma-separated $page to an array, used by other functions.
  $pager_page_array = explode(',', $page);
  // We calculate the total of pages as ceil(items / limit). 
  $pager_total_items[$element] = count($data);
  $pager_total[$element] = ceil($pager_total_items[$element] / $limit);
  $pager_page_array[$element] = max(0, min((int)$pager_page_array[$element], ((int)$pager_total[$element]) - 1));
  return array_slice($data, $pager_page_array[$element] * $limit, $limit, TRUE);
} 

The usage is as simple as:

$output = ''; $tree = taxonomy_get_tree($vocab->vid); $tree = pager_array_splice($tree, 5); // Do something with the 5 terms $output .= theme('pager', array('quantity' => 5)); 

SOAP example (D7)

This is the function that gets XML data.

We use a function from http://php.net/manual/es/book.simplexml.php to transform XML data into an array.

The pager is initialize thru pager_default_initialize() function.

The pager is added using Drupal standard theme pager.

function page_soap_arguments() {
  $sx = simpleXMLToArray(simplexml_load_file('http://www.example.com'));
		
  // Gets number of records
  $total = count($sx);
  // Define items per page for paging
  $num_per_page = 10;
		
  // Initialize pager and gets current page
  $current_page = pager_default_initialize($total, $num_per_page);

  // Split the items up into chunks:
  $chunks = array_chunk($sx, $num_per_page);
  // Get the items for our current page:
  $current_page_items = $chunks[$current_page];
  // Theme each item. Note that the theme
  // some_theme_hook is left out of this tutorial
  // for simplicity
  foreach($current_page_items as $i => $item) {
    $current_page_items[$i] = array(
      '#theme' => 'some_theme_hook',
      '#item' => $item,
    );
  }

  // Generate the render array for our page
  $render_array['page'] = array (
    '#theme' => 'item_list',
    '#items' => $current_page_items,
  );
  // Calls Drupal standard pager theme and set 5 page links on pager
  $render_array['pager'] = array (
    '#theme' => 'pager',
    '#quantity' => 5,
  );

  return $render_array;
}