php 分页类

<?php

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;

//echo $url;

$parse=parse_url($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

$html.="&nbsp;&nbsp;<a href='{$this->uri}&page=1'>{$this->config["first"]}</a>&nbsp;&nbsp;";

return $html;

}

private function prev(){

$html ='';

if($this->page==1)

$html.='';

else

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

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;

$linkPage.="&nbsp;<a href='{$this->uri}&page={$page}'>{$page}</a>&nbsp;";

}

$linkPage.="&nbsp;{$this->page}&nbsp;";

for($i=1; $i<=$inum; $i++){

$page=$this->page+$i;

if($page<=$this->pageNum)

$linkPage.="&nbsp;<a href='{$this->uri}&page={$page}'>{$page}</a>&nbsp;";

else

break;

}

return $linkPage;

}

private function next(){

if($this->page==$this->pageNum)

$html='';

else

$html="&nbsp;&nbsp;<a href='{$this->uri}&page=".($this->page+1)."'>{$this->config["next"]}</a>&nbsp;&nbsp;";

return $html;

}

private function last(){

if($this->page==$this->pageNum)

$html ='';

else

$html ="&nbsp;&nbsp;<a href='{$this->uri}&page=".($this->pageNum)."'>{$this->config["last"]}</a>&nbsp;&nbsp;";

return $html;

}

private function goPage(){

return '&nbsp;&nbsp;<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.'" ><input type="button" value="GO"  page=(this.previousSibling.value>'.$this->pageNum.')?'.$this->pageNum.':this.previousSibling.value;location=\''.$this->uri.'&page=\'+page+\'\'">&nbsp;&nbsp;';

}

function fpage($display=array(0,1,2,3,4,5,6,7,8)){

$html[0]="&nbsp;&nbsp;共有<b>{$this->total}</b>{$this->config["header"]}&nbsp;&nbsp;";

$html[1]="&nbsp;&nbsp;每页显示<b>".($this->end()-$this->start()+1)."</b>条，本页<b>{$this->start()}-{$this->end()}</b>条&nbsp;&nbsp;";

$html[2]="&nbsp;&nbsp;<b>{$this->page}/{$this->pageNum}</b>页&nbsp;&nbsp;";

$html[3]=$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;

}

}

?>

<?php

/*如何使用分页类

1.加载include 分页类

2.实例化对象 

3.查找类里面的构造方法 传参数 一般只传分页总数 每页显示数 第三个或者默认参数可以不管用 特别强调 分页总数是我们从数据库里查询表的数据总数 每页显示数使我们自己设定的

4.我们根据分页的limit数 一般都是成员属性 加入到我们查询的语句后面

$sql = "select * from message"; 

$sql = "select * from message {$page->limit}";

5.显示分页效果 直接输出就行

6.实例化后调用 $page->fpage();显示结果

*/

//引入分页类

public function actionpage(){

$count=Yii::app()->db->createCommand('select count(*) num from user')->queryAll();

$page = new Page($count[0]['num'],7);

        $countd=Yii::app()->db->createCommand('select * from user '.$page->limit)->queryAll();

$this->render('page',array('countd'=>$countd,'fpage'=>$page->fpage()));

}

?>