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Pagination series three

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Release： 2016-07-25 09:11:43
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Pagination category three
  1. class Page {
  2. private $total; //Query the total number of records of all data
  3. private $page; //The current page
  4. private $num; //Display the records of each page Number
  5. private $pageNum; //How many pages in total? private $offset; //Get the starting offset number of the record from the database
  7. function __construct($total, $page=1, $num=5) {
  8. $this ->total=$total;
  9. $this->page=$page;
  10. $this->num=$num;
  11. $this->pageNum=$this->getPageNum();
  12. $this ->offset=$this->getOffset();
  13. }
  15. private function getPageNum(){
  16. return ceil($this->total/$this->num);
  17. }
  19. private function getNextPage () {
  20. if($this->page==$this->pageNum)
  21. return false;
  22. else
  23. return $this->page+1;
  24. }
  26. private function getPrevPage() {
  27. if ($this->page==1)
  28. return false;
  29. else
  30. return $this->page-1;
  31. }
  32. //Offset of database query
  33. private function getOffset() {
  34. return ($ this->page-1)*$this->num;
  35. }
  36. //The number of records at the beginning of the current page
  37. private function getStartNum() {
  38. if($this->total==0)
  39. return 0 ;
  40. else
  41. return $this->offset+1;
  42. }
  43. //The number of records at the end of the current page
  44. private function getEndNum() {
  45. return min($this->offset+$this->num,$ this->total);
  46. }
  48. public function getPageInfo(){
  49. $pageInfo=array(
  50. "row_total" => $this->total,
  51. "row_num" => $this->num ,
  52. "page_num" => $this->getPageNum(),
  53. "current_page" => $this->page,
  54. "row_offset" => $this->getOffset(),
  55. "next_page " => $this->getNextPage(),
  56. "prev_page" => $this->getPrevPage(),
  57. "page_start" => $this->getStartNum(),
  58. "page_end" = > $this->getEndNum()
  59. );
  60. return $pageInfo;
  61. }
  62. }
  63. ?>
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分页类系列之三
source：php.cn
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