php 经典的分页代码类

php 经典的分页代码类 这是一款php分页代码是一款经典的可自动判断url参数再进行分页的实例代码，同时自定了上页，下页，首页，尾页哦，同时还支持select下拉框跳转代码。

php教程 经典的分页代码类
这是一款php分页代码是一款经典的可自动判断url参数再进行分页的实例代码，同时自定了上页，下页，首页，尾页哦，同时还支持select下拉框跳转代码。
*/

class page{

var $page_name="page";

var $next_page='下一页';

var $pre_page='上一页';

var $first_page='首页';

var $last_page='尾页';

var $pre_bar='

var $next_bar='>>';

var $format_left='';

var $format_right='';

var $pagebarnum=5;

var $totalpage=0;

var $nowindex=1;

var $url="";

var $offset=0;

var $rewrite = array();

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']:'';

$action = (array_key_exists('action', $array)) ? $array['action'] : '';
$id0 = (array_key_exists('id0', $array)) ? $array['id0'] : '';
$id1 = (array_key_exists('id1', $array)) ? $array['id1'] : '';
$id2 = (array_key_exists('id2', $array)) ? $array['id2'] : '';
$id3 = (array_key_exists('id3', $array)) ? $array['id3'] : '';

}else{

$total=$array;

$perpage=10;

$nowindex='';

$url='';

$action = '';
$id0 = '';
$id1 = '';
$id2 = '';
$id3 = '';

}

if((!is_int($total))||($totalerror(__function__,$total.' is not a positive integer!');

if((!is_int($perpage))||($perpageerror(__function__,$perpage.' is not a positive integer!');

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

$this->_set_nowindex($nowindex);

$this->_set_url($url);

$this->totalpage=ceil($total/$perpage);

$this->offset=($this->nowindex-1)*$perpage;

$this->action = $action;
$this->rewrite = array('action'=>$action,'id0'=>$id0, 'id1'=>$id1, 'id2'=>$id2, 'id3'=>$id3);
}

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!");

}

}

function next_page($style=''){
if($this->nowindextotalpage){
return $this->_get_link($this->_get_url($this->nowindex+1),$this->next_page,$style);
}
return ''.$this->next_page.'';
}

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.'';
}

function first_page($style=''){
if($this->nowindex==1){
return ''.$this->first_page.'';
}
return $this->_get_link($this->_get_url(1),$this->first_page,$style);
}

function last_page($style=''){
if($this->nowindex==$this->totalpage||$this->totalpage==0){

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;$ipagebarnum;$i++)

{

if($itotalpage){

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='';

for($i=1;$itotalpage;$i++)

{

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

$return.=''.$i.'';

}else{

$return.=''.$i.'';

}

}

unset($i);

$return.='';

return $return;

}

/**

* 获取mysql教程 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 $this->pre_page().$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 $this->first_page().$this->pre_page().'[第'.$this->nowindex.'页]'.$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 $this->first_page("page_box")."".$this->pre_page("page_box")."".$this->nowbar("page_box_a","page_box_b")."".$this->next_page("page_box")."".$this->last_page("page_box")."";

break;

case '4':

$this->next_page='下一页';

$this->pre_page='上一页';

return $this->pre_page().$this->nowbar().$this->next_page();

break;

case '5':

return $this->pre_bar().$this->pre_page().$this->nowbar().$this->next_page().$this->next_bar();

break;

}

}

function _set_url($url="")

{

if(!empty($url)){

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

}else{

if(empty($_server['query_string'])){

$this->url=$_server['request_uri']."?".$this->page_name."=";

}else{

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

$this->url=str_replace($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.'=';

}

}

}

}

function _set_nowindex($nowindex)

{

if(empty($nowindex)){

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

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

}

}else{

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

}

}

function _get_url($pageno=1)
{
global $_cfg;
$arr = $this->rewrite;
//print_r($arr);
//print_r($this->url.$pageno);
if($_cfg['urlrewrite'] && !empty($arr['action'])){
return url_rewrite($arr['action'], array('id0'=>$arr['id0'],'id1'=>$arr['id1'],'id2'=>$arr['id2'],'id3'=>$arr['id3'],'page'=>$pageno));
}else{
return $this->url.$pageno;
}

}

function _get_text($str)

{

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

}

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

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

return ''.$text.'';

}

function error($function,$errormsg)

{

die('error in file '.__file__.' ,function '.$function.'() :'.$errormsg);

}

}
?>