php分页类实例php与mysql简单分页类代码

2. class PageModel {
3. /**
4. * 获取分页数组
5. * @param unknown $page 当前页面数
6. * @param unknown $goodsCount 商品总数
7. * @param unknown $pageLength 每个页面展示页面数
8. */
9. public static function getPageArr($page, $goodsCount, $pageCountLength, $pageLength) {
10. //页面总数
11. $allPageCount = ceil($goodsCount / $pageLength);
12. //如果页面总是比长度短，设定页面长度为页面总数
13. if ($allPageCount <= $pageCountLength) {
14. $allPageCount = ceil($goodsCount / $pageLength);
15. }
16. //总页面数一页展示完
17. if ($allPageCount <= $pageCountLength) {
18. for ($i = 0; $i < $allPageCount; $i ++) {
19. $arr[] = array('page' => $i + 1);
20. }
21. return $arr;
22. }
23. //前后的长度
24. $halfLength = floor($pageCountLength / 2);
25. //因为太小，所以放原来位置，左边
26. if ($page <= $halfLength) {
27. $arr = array();
28. for ($i = 0; $i < $pageCountLength; $i ++) {
29. $arr[] = array('page' => $i + 1);
30. }
31. return $arr;
32. }
33. //太大，只取到边缘，超出也只取到边缘
34. if ($page > $allPageCount - floor($pageCountLength / 2)) {
35. for ($i = -$pageCountLength; $i < 0; $i ++) {
36. $arr[] = array('page' => $allPageCount + $i + 1);
37. }
38. return $arr;
39. }
40. //中间的数，把中间的取出来
41. for ($i = -$halfLength; $i < $pageCountLength - $halfLength; $i ++) {
42. $arr[] = array('page' => $page + $i);
43. }
44. return $arr;
45. }
46. }

二、php分页类代码

代码：

3. class Helper_Page{

4. /** 总信息数 */

5. var $infoCount;
6. /** 总页数 */
7. var $pageCount;
8. /** 每页显示条数　*/
9. var $items;
10. /** 当前页码 */
11. var $pageNo;
12. /** 查询的起始位置　*/
13. var $startPos;
14. /** 下一页　*/
15. var $nextPageNo;
16. /** 上一页　*/
17. var $prevPageNo;

18. function Helper_Page($infoCount, $items, $pageNo)

19. {
20. $this->infoCount = $infoCount;
21. $this->items = $items;
22. $this->pageNo = $pageNo;
23. $this->pageCount = $this->GetPageCount();
24. $this->AdjustPageNo();
25. $this->startPos = $this->GetStartPos();
26. }
27. function AdjustPageNo()
28. {
29. if($this->pageNo == '' || $this->pageNo < 1)
30. $this->pageNo = 1;
31. if ($this->pageNo > $this->pageCount)
32. $this->pageNo = $this->pageCount;
33. }
34. /**
35. * 下一页
36. */
37. function GoToNextPage()
38. {
39. $nextPageNo = $this->pageNo + 1;
40. if ($nextPageNo > $this->pageCount)
41. {
42. $this->nextPageNo = $this->pageCount;
43. return false;
44. }
45. $this->nextPageNo = $nextPageNo;
46. return true;
47. }
48. /**
49. * 上一页
50. */
51. function GotoPrevPage()
52. {
53. $prevPageNo = $this->pageNo - 1;
54. if ($prevPageNo < 1)
55. {
56. $this->prevPageNo = 1;
57. return false;
58. }
59. $this->prevPageNo = $prevPageNo;
60. return true;
61. }
62. function GetPageCount()
63. {
64. return ceil($this->infoCount / $this->items);
65. }
66. function GetStartPos()
67. {
68. return ($this->pageNo - 1) * $this->items;
69. }
70. }