lib/pageselector.php

   1 <?php
   2         define(MAX_SELECTABLE_PAGES, 10);
   3
   4         class PageSelector
   5         {
   6                 function __construct($baseUrl, $itemsPerPage, $itemsCount)
   7                 {
   8                         settype($this->pageCount , "integer");
   9                         settype($itemsCount, "integer");
  10                         settype($itemsPerPage, "integer");
  11
  12                         $this->baseUrl = $baseUrl;
  13                         $this->pageCount = $itemsCount / $itemsPerPage;
  14                 }
  15
  16                 function getLinks($page_number)
  17                 {
  18                         settype($page_number, "integer");
  19                         settype($p, "integer");
  20                         settype($first, "integer");
  21                         settype($last, "integer");
  22
  23                         $links = array();
  24                         $first = $page_number - (MAX_SELECTABLE_PAGES / 2);
  25                         $first = $first  > 0 ? $first : 1 ;
  26                         $last  = $first + MAX_SELECTABLE_PAGES;
  27                         $last  = $last < $this->pageCount ? $last : $this->pageCount;
  28
  29                         if ($page_number > 1) {
  30                                 $links['previous'] = $this->baseUrl . ($page_number - 1);
  31                         }
  32                         for ($p=$first; $p <= $last; $p++) {
  33                                 if ($p == $page_number) {
  34                                         $links[$p] = '#';
  35                                 } else {
  36                                         $links[$p] = $this->baseUrl . $p;
  37                                 }
  38                         }
  39                         if ($page_number < $this->pageCount) {
  40                                 $links['next'] = $this->baseUrl . ($page_number + 1);
  41                         }
  42
  43                         return $links;
  44                 }
  45 }