A practical php paging class

/*
Practical php paging class
subpages
*/
class SubPages{
 private $each_disNums;//The number of entries displayed per page
 private $nums ;//Total number of entries
 private $current_page;//The currently selected page
 private $sub_pages;//Number of pages displayed each time
 private $pageNums;//Total number of pages
 private $page_array = array(); //Array used to construct pagination
 private $subPage_link;//Links for each pagination
 private $subPage_type;//Display paging type
 /*
 __construct is the constructor of SubPages , used to run automatically when creating a class.
 @$each_disNums The number of entries displayed on each page
 @nums The total number of entries
 @current_num The currently selected page
 @sub_pages The number of pages displayed each time
 @subPage_link Each page The link
 @subPage_type displays the type of paging

 When @subPage_type=1, it is the normal paging mode
 example: A total of 4523 records, 10 records are displayed on each page, the current page 1/453 [Home] [Previous page] [ Next page] [Last page]
 When @subPage_type=2, it is the classic paging style
 example: Current page 1/453 [Home page] [Previous page] 1 2 3 4 5 6 7 8 9 10 [Next page] [ Last page]
 */
 function __construct($each_disNums,$nums,$current_page,$sub_pages,$subPage_link,$subPage_type){
 $this->each_disNums=intval($each_disNums);
 $this->nums =intval($nums);
 if(!$current_page){
 $this->current_page=1;
 }else{
 $this->current_page=intval($current_page);
 }
 $this-> ;sub_pages=intval($sub_pages);
 $this->pageNums=ceil($nums/$each_disNums);
 $this->subPage_link=$subPage_link;
 $this->show_SubPages($subPage_type);
 //echo $this->pageNums."--".$this->sub_pages;
 }

 /*
 __destruct destructor, called when the class is no longer in use, this function is used to release resources.
 */
 function __destruct(){
 unset($each_disNums);
 unset($nums);
 unset($current_page);
 unset($sub_pages);
 unset($pageNums);
 unset($page_array) ;
 unset($subPage_link);
 unset($subPage_type);
 }

 /*
 show_SubPages function is used in the constructor. And used to determine what kind of paging to display
 */
 function show_SubPages($subPage_type){
 if($subPage_type == 1){
 $this->subPageCss1();
 }elseif ($subPage_type == 2) {
 $this->subPageCss2();
 }
 }

 /*
 Function used to initialize the array for creating pagination.
  */
  function initArray(){
   for($i=0;$i<$this->sub_pages;$i++){
    $this->page_array[$i]=$i;
   }
   return $this->page_array;
  }

  /*
   construct_num_Page该函数使用来构造显示的条目
   即使：[1][2][3][4][5][6][7][8][9][10]
  */
  function construct_num_Page(){
   if($this->pageNums < $this->sub_pages){
    $current_array=array();
    for($i=0;$i<$this->pageNums;$i++){
     $current_array[$i]=$i+1;
    }
   }else{
    $current_array=$this->initArray();
    if($this->current_page <= 3){
     for($i=0;$i      $current_array[$i]=$i+1;
     }
    }elseif ($this->current_page <= $this->pageNums && $this->current_page > $this->pageNums - $this->sub_pages + 1 ){
     for($i=0;$i      $current_array[$i]=($this->pageNums)-($this->sub_pages)+1+$i;
     }
    }else{
     for($i=0;$i      $current_array[$i]=$this->current_page-2+$i;
     }
    }
   }
   return $current_array;
  }

  /*
  构造普通模式的分页
  共4523条记录,每页显示10条,当前第1/453页 [首页] [上页] [下页] [尾页]
  */
  function subPageCss1(){
   $subPageCss1Str="";
   $subPageCss1Str.="共".$this->nums."条记录，";
   $subPageCss1Str.="每页显示".$this->each_disNums."条，";
   $subPageCss1Str.="当前第".$this->current_page."/".$this->pageNums."页 ";
   if($this->current_page > 1){
    $firstPageUrl=$this->subPage_link."1";
    $prewPageUrl=$this->subPage_link.($this->current_page-1);
    $subPageCss1Str.="[首页] ";
    $subPageCss1Str.="[上一页] ";
   }else {
    $subPageCss1Str.="[首页] ";
    $subPageCss1Str.="[上一页] ";
   }

   if($this->current_page < $this->pageNums){
    $lastPageUrl=$this->subPage_link.$this->pageNums;
    $nextPageUrl=$this->subPage_link.($this->current_page+1);
    $subPageCss1Str.=" [下一页] ";
    $subPageCss1Str.="[尾页] ";
   }else {
    $subPageCss1Str.="[下一页] ";
    $subPageCss1Str.="[尾页] ";
   }
   echo $subPageCss1Str;
  }

  /*
  构造经典模式的分页
  当前第1/453页 [首页] [上页] 1 2 3 4 5 6 7 8 9 10 [下页] [尾页]
  */
  function subPageCss2(){
   $subPageCss2Str="";
   $subPageCss2Str.="当前第".$this->current_page."/".$this->pageNums."页 ";

   if($this->current_page > 1){
    $firstPageUrl=$this->subPage_link."1";
    $prewPageUrl=$this->subPage_link.($this->current_page-1);
    $subPageCss2Str.="[首页] ";
    $subPageCss2Str.="[上一页] ";
   }else {
    $subPageCss2Str.="[首页] ";
    $subPageCss2Str.="[上一页] ";
   }

   $a=$this->construct_num_Page();
   for($i=0;$i    $s=$a[$i];
    if($s == $this->current_page ){
     $subPageCss2Str.="[".$s."]";
    }else{
     $url=$this->subPage_link.$s;
     $subPageCss2Str.="[".$s."]";
    }
   }

   if($this->current_page < $this->pageNums){
    $lastPageUrl=$this->subPage_link.$this->pageNums;
    $nextPageUrl=$this->subPage_link.($this->current_page+1);
    $subPageCss2Str.=" [下一页] ";
    $subPageCss2Str.="[尾页] ";
   }else {
    $subPageCss2Str.="[下一页] ";
    $subPageCss2Str.="[尾页] ";
   }
   echo $subPageCss2Str;
  }
}
?>

Test page, test.php

require_once("SubPages.php");
//Number of items displayed per page
$page_size=20;
 //Total number of entries
$nums=1024;
//Number of pages displayed each time
$sub_pages=10;
//Get the current Which page
$pageCurrent=$_GET["p"];
//if(!$pageCurrent) $pageCurrent=1;

$subPages=new SubPages($page_size,$ nums,$pageCurrent,$sub_pages,"test.php?p=",2);
?>