刚学PHP，写的不好，请大家别笑,用Mysql数据库,我还不知道在类中怎么捕捉错误，然后返回。

代码如下：

1. <?php
2. class Pageslice{
3. var $pageSize;//每页显示数据条数
4. var $page;//当前页面
5. var $totalPages;//总页数
6. var $startNum;//strat
7. var $dbtable;//要查询的数据表
8. var $rs;//记录集
9. function setUnit($n){//设置每页显示数据条数
10. $this->pageSize=$n;
11. $this->getTotalPages();
12. $this->getPage();
13. }
14. function bindTable($tb){//绑定表
15. $this->dbtable = $tb;
16. $this->setUnit(5);//默认显示5条记录
17. }
18. function getTotalPages(){//取得总页数
19. $tb =$this->dbtable;
20. $sqlStr = "select * from ".$tb;
21. $rsStr = mysql_query($sqlStr);
22. $this->totalPages = ceil(count(mysql_fetch_row($rsStr))/$this->pageSize);
23. return $this->totalPages;
24. }
25. function getPage(){//得到当前页码
26. if( $_GET['page'] == NULL || abs($_GET['page']) >$this->totalPages ){
27. $this->page = 1;
28. }else{
29. $this->page =$_GET['page'];
30. }
31. return $this->page;
32. }
33. function getRS(){//取记录集
34. $this->startNum = ($this->page-1)*$this->pageSize;
35. $tb = $this->dbtable;
36. $rs_sql = "select * from ".$tb." order by id DESC limit ". $this->startNum.",".$this->pageSize;
37. $this->rs = mysql_query($rs_sql);
38. return $this->rs;
39. }
40. function showFlip(){//显示分页控件
41. $page_string ="&nbsp;&nbsp;总共".$this->totalPages."页，当前第".$this->page."页&nbsp;&nbsp;";
42. if( $this->page == 1 ){
43. $page_string.="第一页|上一页|";
44. }else{
45. $page_string.= "<a href=?page=1>第一页</a>|<a href=?page=".($this->page-1).">上一页</a>|";
46. }
47. if( ($this->page == $this->totalPages) || ($this->totalPages == 0) ){
48. $page_string.=" 下一页|尾页";
49. }else{
50. $page_string.= "<a href=?page=".($this->page+1).">下一页</a>|<a href=?page=".$this->totalPages.">尾页</a>";
51. }
52. print $page_string;
53. }
54. }
55. ?>[/php]
56. 应用，假设已经建立了test表，并且已经连上
57. [php]$pages = new Pageslice;//建立分页对象
58. $pages->bindTable('test');//读取test表
59. //$pages->setUnit(3);//可以重新设置显示条数
60. $rs = $pages->getRS();
61. /*
62. .........其他代码
63. */
64. $pages->showFlip()
65. //然后在需要显示分页的地方调用分页