Simple, convenient, full-featured PHP paging class

<?php  
class SubPages{  
    
   private  $each_disNums;//每页显示的条目数  
  private  $nums;//总条目数  
  private  $current_page;//当前被选中的页  
  private  $sub_pages;//每次显示的页数  
  private  $pageNums;//总页数  
  private  $page_array = array();//用来构造分页的数组  
  private  $subPage_link;//每个分页的链接  
  private  $subPage_type;//显示分页的类型  
   /* 
   __construct是SubPages的构造函数，用来在创建类的时候自动运行. 
   @$each_disNums   每页显示的条目数 
   @nums     总条目数 
   @current_num     当前被选中的页 
   @sub_pages       每次显示的页数 
   @subPage_link    每个分页的链接 
   @subPage_type    显示分页的类型 
   
   当@subPage_type=1的时候为普通分页模式 
         example：   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] 
         当@subPage_type=2的时候为经典分页样式 
         example：   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 __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析构函数，当类不在使用的时候调用，该函数用来释放资源。 
   */  
  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函数用在构造函数里面。而且用来判断显示什么样子的分页   
   */  
  function show_SubPages($subPage_type){  
    if($subPage_type == 1){  
    $this->subPageCss1();  
    }elseif ($subPage_type == 2){  
    $this->subPageCss2();  
    }  
   }  
    
    
  /* 
    用来给建立分页的数组初始化的函数。 
   */  
  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;$i<count($current_array);$i++){  
      $current_array[$i]=$i+1;  
      }  
     }elseif ($this->current_page <= $this->pageNums && $this->current_page > $this->pageNums - $this->sub_pages + 1 ){  
      for($i=0;$i<count($current_array);$i++){  
      $current_array[$i]=($this->pageNums)-($this->sub_pages)+1+$i;  
      }  
     }else{  
      for($i=0;$i<count($current_array);$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<count($a);$i++){  
    $s=$a[$i];  
     if($s == $this->current_page ){  
     $subPageCss2Str.="[<span style='color:red;font-weight:bold;'>".$s."</span>]";  
     }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;  
   }  
}  
?>   

<?php  
require_once("SubPages.php");  
//每页显示的条数  
  $page_size=20;  
//总条目数  
  $nums=1024;  
//每次显示的页数  
  $sub_pages=10;  
//得到当前是第几页  
  $pageCurrent=$_GET["p"];  
  //if(!$pageCurrent) $pageCurrent=1;  
    
  $subPages=new SubPages($page_size,$nums,$pageCurrent,$sub_pages,"test.php?p=",2);  
?>