php下的一个分页类-创新互联

这个分页类，参考了慕课网和燕十八的分页类。

慕课网分页类学习网址：http://www.imooc.com/learn/419

效果图：

class page{
   public $cpage;         //传入的页码
   public $totalnum;      //总的记录数，数据
   public $total_page;      //总页数
   public $per_page = 10;   //每页的记录数
   public $showpage = 5;   //页码条显示的页码个数
   public $pageoffset;      //页码条偏移的页码个数
   public $pageup;         //上一页
   public $pagedown;      //下一页
   public $start=1;      //开始页码
   public $end;         //结束页码

   public $fycod = array();

   //初始化各个参数
   public function __construct($cpage,$totalnum){

      $this->cpage = $cpage;
      $this->totalnum = $totalnum;
      $this->pageoffset = ($this->showpage-1)/2;
      $this->total_page = $this->totalnum/10;
      $this->end = $this->total_page;

      //总页数
      $this->total_page = ceil($this->totalnum/$this->per_page);
   }

   //返回总的页数
   public function gettotal_page(){
      return $this->total_page;
   }

   //返回每页的记录数
   public function getper_page(){
      return $this->per_page;
   }

   //返回当前页
   public function getcpage()
   {
      return $this->cpage;
   }

   //修改当前页
   public function modcpage($cpage){
      $this->cpage = $cpage;
   }

   //返回上一页
   public function getpageup(){
      if($this->cpage<=1){
           return $this->pageup = 1;
       }
       return $this->pageup = $this->cpage -1;
   }

   //返回下一页
   public function getpagedown(){
      if($this->cpage < $this->total_page){
         return $this->pagedown = $this->cpage+1;
      }
   }

   //返回一个数组，关于页码的各个参数
   public function getpages(){
      $pages = array();

      $pages['total_page'] = $this->total_page;
      $pages['per_page'] = $this->per_page;
      $pages['cpage']   = $this->cpage;
      $pages['pageup'] = $this->getpageup();
      $pages['pagedown'] = $this->getpagedown();
      $pages['start'] = $this->start;
      $pages['end'] = $this->end;
      $pages['pageoffset'] = $this->pageoffset;
      $pages['showpage'] = $this->showpage;

      return $pages;
   }

   //分页代码函数，返回一个数组，作用：分页的页码数
   public function getfycod(){

      if($this->cpage > $this->pageoffset){
         $this->start = $this->cpage - $this->pageoffset;
         $this->end = $this->total_page > $this->cpage + $this->pageoffset ? $this->cpage + $this->pageoffset : $this->total_page;
      }else{
         $this->start = 1;
         $this->end = $this->total_page > $this->showpage ? $this->showpage : $this->total_page;
      }

      if($this->cpage + $this->pageoffset > $this->total_page){
         $this->start = $this->start - ($this->cpage + $this->pageoffset - $this->end);
      }

      for($i=$this->start;$i<=$this->end;$i++){
         $this->fycod[] = $i;
      }

      return $this->fycod;
   }
}

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