yii分页组件的使用

本文使用时，分页类在yii框架中以组件的形式存在于components中。

action代码如下：

public function actionIndex(){     
        $user=User::model();

        //分页的使用
        $count=$user->count(); //获取总页数
        $pagesize=3;   //每一页显示的记录条数
        $page=new Page($count,$pagesize);
        $sql="select * from {{user}} $page->limit";
        $info=$user->findAllBySql($sql);
        $show_page=$page->fpage();
        $this->renderPartial("index",array("info"=>$info,"show_page"=>$show_page));
    }

在view页面，遍历info即可获取信息，输出show_page即可显示分页列表等信息。

现附上page.php代码如下：

<?php
/**
 * 分页类，以组件形式存在于componnets文件中
 */
class Page {
		private $total; //数据表中总记录数
		private $listRows; //每页显示行数
		private $limit;
		private $uri;
		private $pageNum; //页数
		private $config=array("header"=>"个记录", "prev"=>"上一页", "next"=>"下一页", "first"=>"首 页", "last"=>"尾 页");
		private $listNum=8;
		/*
		 * $total 
		 * $listRows
		 */
		public function __construct($total, $listRows=10, $pa=""){
			$this->total=$total;
			$this->listRows=$listRows;
			$this->uri=$this->getUri($pa);
			$this->page=!empty($_GET["page"]) ? $_GET["page"] : 1;
			$this->pageNum=ceil($this->total/$this->listRows);
			$this->limit=$this->setLimit();
		}

		private function setLimit(){
			return "Limit ".($this->page-1)*$this->listRows.", {$this->listRows}";
		}

		private function getUri($pa){
			$url=$_SERVER["REQUEST_URI"].(strpos($_SERVER["REQUEST_URI"], "?")?"":"?").$pa;
			$parse=parse_url($url);
			if(isset($parse["query"])){
				parse_str($parse["query"],$params);
				unset($params["page"]);
				$url=$parse["path"]."?".http_build_query($params);
			}
			return $url;
		}

		function __get($args){
			if($args=="limit")
				return $this->limit;
			else
				return null;
		}

		private function start(){
			if($this->total==0)
				return 0;
			else
				return ($this->page-1)*$this->listRows+1;
		}

		private function end(){
			return min($this->page*$this->listRows,$this->total);
		}

		private function first(){
                        $html="";
			if($this->page==1)
				$html.="";
			else
				$html.="  <a href="{$this->uri}&page=1">{$this->config["first"]}</a>  ";

			return  $html;
		}

		private function prev(){
                        $html="";
			if($this->page==1)
				$html.="";
			else
				$html.="  <a href="{$this->uri}&page=".($this->page-1)."">{$this->config["prev"]}</a>  ";

			return $html;
		}

		private function pageList(){
			$linkPage="";	
			$inum=floor($this->listNum/2);		
			for($i=$inum; $i>=1; $i--){
				$page=$this->page-$i;
				if($page<1)
					continue;
				$linkPage.=" <a href="{$this->uri}&page={$page}">{$page}</a> ";
			}		
			$linkPage.=" {$this->page} ";			
			for($i=1; $i<=$inum; $i++){
				$page=$this->page+$i;
				if($page<=$this->pageNum)
					$linkPage.=" <a href="{$this->uri}&page={$page}">{$page}</a> ";
				else
					break;
			}
			return $linkPage;
		}

		private function next(){
                        $html="";
			if($this->page==$this->pageNum)
				$html.="";
			else
				$html.="  <a href="{$this->uri}&page=".($this->page+1)."">{$this->config["next"]}</a>  ";

			return $html;
		}

		private function last(){
                        $html="";
			if($this->page==$this->pageNum)
				$html.="";
			else
				$html.="  <a href="{$this->uri}&page=".($this->pageNum)."">{$this->config["last"]}</a>  ";
			return $html;
		}

		private function goPage(){
			return "  <input type="text" onkeydown="javascript:if(event.keyCode==13){var page=(this.value>".$this->pageNum.")?".$this->pageNum.":this.value;location="".$this->uri."&page="+page+""}" value="".$this->page."" style="width:25px"><input type="button" value="GO" onclick="javascript:var page=(this.previousSibling.value>".$this->pageNum.")?".$this->pageNum.":this.previousSibling.value;location="".$this->uri."&page="+page+""">  ";
		}
		function fpage($display=array(0,1,2,3,4,5,6,7,8)){
			$html[0]="  共有<b>{$this->total}</b>{$this->config["header"]}  ";
			$html[1]="  每页显示<b>".($this->end()-$this->start()+1)."</b>条，本页<b>{$this->start()}-{$this->end()}</b>条  ";
			$html[2]="  <b>{$this->page}/{$this->pageNum}</b>页  ";			
			$html[3]=$this->first();
			$html[4]=$this->prev();
			$html[5]=$this->pageList();
			$html[6]=$this->next();
			$html[7]=$this->last();
			$html[8]=$this->goPage();
			$fpage="";
			foreach($display as $index){
				$fpage.=$html[$index];
			}
			return $fpage;
		}	
	}