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PHP paging function code sharing

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Release: 2016-07-25 08:51:12
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  1. //$count is the total number of entries, $page is the current page number, $page_size is the number of entries displayed on each page
  2. function show_page($count,$page, $page_size)
  3. {
  4. $page_count = ceil($count/$page_size); //Calculate the total number of pages
  5. $init=1;
  6. $page_len=7;
  7. $max_p=$page_count;
  8. $pages= $page_count;
  9. //Judge the current page number
  10. $page=(empty($page)||$page<0)?1:$page;
  11. //Get the current page url
  12. $url = $_SERVER['REQUEST_URI' ];
  13. //Remove the original page parameters in the url to add new page parameters
  14. $parsedurl=parse_url($url);
  15. $url_query = isset($parsedurl['query']) ? $parsedurl['query'] :'';
  16. if($url_query != ''){
  17. $url_query = preg_replace("/(^|&)page=$page/",'',$url_query);
  18. $url = str_replace($parsedurl ['query'],$url_query,$url);
  19. if($url_query != ''){
  20. $url .= '&';
  21. }
  22. } else {
  23. $url .= '?';
  24. }
  25. //Paging function code
  26. $page_len = ($page_len%2)?$page_len:$page_len+1; //Number of page numbers
  27. $pageoffset = ($page_len-1)/2; //About the number of page numbers Offset
  28. $navs='';
  29. if($pages != 0){
  30. if($page!=1){
  31. $navs.="Homepage "; //First page
  32. $navs.=""; //Previous page
  33. } else {
  34. $navs .= "Homepage";
  35. $navs .= "< ;span class='disabled'>Previous page";
  36. }
  37. if($pages>$page_len)
  38. {
  39. //If the current page is less than or equal to the left offset
  40. if($page<=$ pageoffset){
  41. $init=1;
  42. $max_p = $page_len;
  43. }
  44. else //If the current page is greater than the left offset
  45. {
  46. //If the current page number right offset exceeds the maximum number of pages
  47. if($page+ $pageoffset>=$pages+1){
  48. $init = $pages-$page_len+1;
  49. }
  50. else
  51. {
  52. //Calculation when both left and right offsets exist
  53. $init = $page-$pageoffset;
  54. $max_p = $page+$pageoffset;
  55. }
  56. }
  57. }
  58. for($i=$init;$i<=$max_p;$i++)
  59. {
  60. if($i==$page){$navs.= "".$i.'';}
  61. else {$navs.=" ".$i."";}
  62. }
  63. if($page!=$pages)
  64. {
  65. $navs.=" Next page ";//Next page
  66. $navs.="Last page"; //Last page
  67. } else {
  68. $navs .= "Next page
  69. $navs .= "Last page";
  70. }
  71. echo "$navs";
  72. }
  73. }
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