php分页类

来源：互联网发布：大数据学什么语言编辑：程序博客网时间：2024/04/29 02:58

class page

{

/**

* config ,public

var $page_name="PB_page";//page标签，用来控制url页。比如说xxx.php?PB_page=2中的PB_page

var $next_page='>';//下一页

var $pre_page='<';//上一页

var $first_page='First';//首页

var $last_page='Last';//尾页

var $pre_bar='<<';//上一分页条

var $next_bar='>>';//下一分页条

var $format_left='[';

var $format_right=']';

var $is_ajax=false;//是否支持AJAX分页模式

/**

* private

var $pagebarnum=10;//控制记录条的个数。

var $totalpage=0;//总页数

var $ajax_action_name='';//AJAX动作名

var $nowindex=1;//当前页

var $url="";//url地址头

var $offset=0;

/**

* constructor构造函数

* @param array $array['total'],$array['perpage'],$array['nowindex'],$array['url'],$array['ajax']

function page($array)

{

if(is_array($array)){

if(!array_key_exists('total',$array))$this->error(__FUNCTION__,'need a param of total');

$total=intval($array['total']);

$perpage=(array_key_exists('perpage',$array))?intval($array['perpage']):10;

$nowindex=(array_key_exists('nowindex',$array))?intval($array['nowindex']):'';

$url=(array_key_exists('url',$array))?$array['url']:'';

}else{

$total=$array;

$perpage=10;

$nowindex='';

$url='';

}

if((!is_int($total))||($total<0))$this->error(__FUNCTION__,$total.' is not a positive integer!');

if((!is_int($perpage))||($perpage<=0))$this->error(__FUNCTION__,$perpage.' is not a positive integer!');

if(!empty($array['page_name']))$this->set('page_name',$array['page_name']);//设置pagename

$this->_set_nowindex($nowindex);//设置当前页

$this->_set_url($url);//设置链接地址

$this->totalpage=ceil($total/$perpage);
$this->total=$total;
$this->perpage=$perpage;
$this->offset=($this->nowindex-1)*$perpage;

if(!empty($array['ajax']))$this->open_ajax($array['ajax']);//打开AJAX模式

}

/**

* 设定类中指定变量名的值，如果改变量不属于这个类，将throw一个exception

* @param string $var

* @param string $value

function set($var,$value)

{

if(in_array($var,get_object_vars($this)))

$this->$var=$value;

else {

$this->error(__FUNCTION__,$var." does not belong to PB_Page!");

}

/**

* 打开倒AJAX模式

* @param string $action 默认ajax触发的动作。

function open_ajax($action)

{

$this->is_ajax=true;

$this->ajax_action_name=$action;

}

/**

* 获取显示"下一页"的代码

* @param string $style

* @return string

function next_page($style='')

{

if($this->nowindex<$this->totalpage){

return $this->_get_link($this->_get_url($this->nowindex+1),$this->next_page,$style);

}

return ''.$this->next_page.'';

}

/**

* 获取显示“上一页”的代码

* @param string $style

* @return string

function pre_page($style='')

{

if($this->nowindex>1){

return $this->_get_link($this->_get_url($this->nowindex-1),$this->pre_page,$style);

}

return ''.$this->pre_page.'';

}

/**

* 获取显示“首页”的代码

* @return string

function first_page($style='')

{

if($this->nowindex==1){

return ''.$this->first_page.'';

}

return $this->_get_link($this->_get_url(1),$this->first_page,$style);

}

/**

* 获取显示“尾页”的代码

* @return string

function last_page($style='')

{

if($this->nowindex==$this->totalpage){

return ''.$this->last_page.'';

}

return $this->_get_link($this->_get_url($this->totalpage),$this->last_page,$style);

}

function nowbar($style='',$nowindex_style='')

{

$plus=ceil($this->pagebarnum/2);

if($this->pagebarnum-$plus+$this->nowindex>$this->totalpage)$plus=($this->pagebarnum-$this->totalpage+$this->nowindex);

$begin=$this->nowindex-$plus+1;

$begin=($begin>=1)?$begin:1;

$return='';

for($i=$begin;$i<$begin+$this->pagebarnum;$i++)

{

if($i<=$this->totalpage){

if($i!=$this->nowindex)

$return.=$this->_get_text($this->_get_link($this->_get_url($i),$i,$style));

else

$return.=$this->_get_text(''.$i.'');

}else{

break;

}

$return.="/n";

}

unset($begin);

return $return;

}

/**

* 获取显示跳转按钮的代码

* @return string

function select()

{

$return='<select name="PB_Page_Select" onChange=javascript:location=this.options[this.selectedIndex].value;>';

for($i=1;$i<=$this->totalpage;$i++)

{

if($i==$this->nowindex){

$return.='<option value="'.$this->_get_url($i).'" selected>'.$i.'</option>';

}else{

$return.='<option value="'.$this->_get_url($i).'">'.$i.'</option>';

}

unset($i);

$return.='</select>';

return $return;

}

/**

* 获取mysql 语句中limit需要的值

* @return string

function offset()

{

return $this->offset;

}

/**

* 控制分页显示风格（你可以增加相应的风格）

* @param int $mode

* @return string

function show($mode=1)

{

switch ($mode)

{

case '1':

$this->next_page='下一页';

$this->pre_page='上一页';

return '当前页'.$this->nowindex.'/'.$this->totalpage.' 共有'.$this->total.'条信息每页'.$this->perpage.'条 '.$this->pre_page().$this->nowbar().$this->next_page().'第'.$this->select().'页';

break;

case '2':

$this->next_page='下一页';

$this->pre_page='上一页';

$this->first_page='首页';

$this->last_page='尾页';

return '当前页'.$this->nowindex.'/'.$this->totalpage.' 共有'.$this->total.'条信息每页'.$this->perpage.'条 '.$this->first_page().$this->pre_page().$this->next_page().$this->last_page().'第'.$this->select().'页';

break;

case '3':

$this->next_page='下一页';

$this->pre_page='上一页';

$this->first_page='首页';

$this->last_page='尾页';

return '当前页'.$this->nowindex.'/'.$this->totalpage.' 共有'.$this->total.'条信息每页'.$this->perpage.'条 '.$this->first_page().$this->pre_page().$this->next_page().$this->last_page();

break;

case '4':

$this->next_page='下一页';

$this->pre_page='上一页';

return '当前页'.$this->nowindex.'/'.$this->totalpage.' 共有'.$this->total.'条信息每页'.$this->perpage.'条 '.$this->pre_page().$this->nowbar().$this->next_page();

break;

case '5':

return '当前页'.$this->nowindex.'/'.$this->totalpage.' 共有'.$this->total.'条信息每页'.$this->perpage.'条 '.$this->pre_bar().$this->pre_page().$this->nowbar().$this->next_page().$this->next_bar();

break;

}

/*----------------private function (私有方法)-----------------------------------------------------------*/

/**

* 设置url头地址

* @param: String $url

* @return boolean

function _set_url($url="")

{

if(!empty($url)){

//手动设置

$this->url=$url.((stristr($url,'?'))?'&':'?').$this->page_name."=";

}else{

//自动获取

if(empty($_SERVER['QUERY_STRING'])){

//不存在QUERY_STRING时

$this->url=$_SERVER['REQUEST_URI']."?".$this->page_name."=";

}else{

if(stristr($_SERVER['QUERY_STRING'],$this->page_name.'=')){

//地址存在页面参数

$this->url=str_replace($this->page_name.'='.$this->nowindex,'',$_SERVER['REQUEST_URI']);

$last=$this->url[strlen($this->url)-1];

if($last=='?'||$last=='&'){

$this->url.=$this->page_name."=";

}else{

$this->url.='&'.$this->page_name."=";

}

}else{

$this->url=$_SERVER['REQUEST_URI'].'&'.$this->page_name.'=';

}//end if

}

/**

* 设置当前页面

function _set_nowindex($nowindex)

{

if(empty($nowindex)){

//系统获取

if(isset($_GET[$this->page_name])){

$this->nowindex=intval($_GET[$this->page_name]);

}

}else{

//手动设置

$this->nowindex=intval($nowindex);

}

/**

* 为指定的页面返回地址值

* @param int $pageno

* @return string $url

function _get_url($pageno=1)

{

return $this->url.$pageno;

}

/**

* 获取分页显示文字，比如说默认情况下_get_text('<a href="">1</a>')将返回[<a href="">1</a>]

* @param String $str

* @return string $url

function _get_text($str)

{

return $this->format_left.$str.$this->format_right;

}

/**

* 获取链接地址

function _get_link($url,$text,$style=''){

$style=(empty($style))?'':'class="'.$style.'"';

if($this->is_ajax){

//如果是使用AJAX模式

return '<a '.$style.' href="javascript:'.$this->ajax_action_name.'(/''.$url.'/')">'.$text.'</a>';

}else{

return '<a '.$style.' href="'.$url.'">'.$text.'</a>';

}

/**

* 出错处理方式

function error($function,$errormsg)

{

die('Error in file '.__FILE__.' ,Function '.$function.'() :'.$errormsg);

}