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PHP paging principle simple paging code summary

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2016-07-25 08:52:511025browse

  3. //Determine how many items are displayed on each page

  4. //count(*) Query the total number of items
  5. //Calculate the total number of pages ceil()
  6. //Judge $_GET and assign the current page number
  7. //mysql query limit (current page number-1)*number of items per page, number of items per page
  8. //If the total number of items is not empty, loop mysql_fetch_array()
  9. //$_SERVER['PHP_SELF']
  10. //Previous page?page=Current page-1
  11. //Next page?page=Current page+1
  12. //edit: bbs.it-home.org
  13. include("conn.php" );
  14. $perpagenum = 3;
  15. $total = mysql_fetch_array(mysql_query("SELECT COUNT(*) FROM message"));
  16. $Total = $total[0];
  17. $Totalpage =ceil($Total/$perpagenum) ;

  18. if(!isset($_GET['page'])||!intval($_GET['page'])||$_GET['page']>$Totalpage ){

  19. $page = 1;
  20. }else{
  21. $page = $_GET['page'];
  22. }

  23. $start = ($page-1)*$perpagenum;

  24. $sql = "SELECT * FROM message ORDER BY id DESC LIMIT $start,$perpagenum";
  25. $result = mysql_query($sql);
  26. $contents = mysql_fetch_array($result);
  27. ?>
  30. if($total){
  31. do{
  32. $user = $contents['user'];
  33. $contact = $contents['contact'];
  34. $content = $contents['content'];
  35. $date = $contents['date'];

  36. ?>

  38. < ;td width="193" height="22">Nickname:
  45. }
  46. //php paging starts
  47. while($contents=mysql_fetch_array($result));
  48. $per = $page-1;
  49. $next= $page+1;
  50. echo "
    Total".$ Total." comments, ".$perpagenum." messages per page, total ".$page."/".$Totalpage." pages. ";
  51. if($page!=1){
  52. echo "Homepage".
  53. "Previous page";
  54. }
  55. if($page!=$Totalpage){
  56. echo "Next page";
  57. echo "Last page";
  58. }
  59. ?>
  60. }
  61. ?>
  62. Posted in:

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