PHP multi-style paging class (supports ajax paging)_PHP tutorial

php tutorial multi-style paging class (supports ajax paging)

/**

* example:
* Mode Four paging modes:
require_once('../libs/classes/page.class.php');
$page=new page(array ('total'=>1000,'perpage'=>20));
echo 'mode:1
'.$page->show();
echo '

---

mode:2
'.$page->show(2);
echo '

---

mode:3
'.$page->show(3);
echo '

---

mode:4
'.$page->show(4);
Turn on AJAX:
$ajaxpage=new page(array

('total'=> ;1000,'perpage'=>20,'ajax'=>'ajax_page','page_name'=>'test'));
echo 'mode:1
'.$ajaxpage-> ;show();
Adopt inherited custom paging display mode:

*/
class page
{
/**
* config ,public
*/
var $page_name="PB_page";//page tag, used to control the url page
var $next_page='>';//Next page
var $pre_page='<';//Previous page
var $first_page='First';//Homepage
var $last_page='Last';//Last page
var $pre_bar=' <<';//Previous paging bar
var $next_bar='>>';//Next paging bar
var $format_left='[';
var $format_right= ']';
var $is_ajax=false;//Whether AJAX paging mode is supported

/**
* private
*
*/
var $pagebarnum=10;//Control the individual record bar number.
var $totalpage=0;//Total number of pages
var $ajax_action_name='';//AJAX action name
var $nowindex=1;//Current page
var $url=" ";//url address header
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']);//Set

pagename
$this->_set_nowindex($nowindex);//Set the current page
$this->_set_url($url);//Set the link address
$this->totalpage =ceil($total/$perpage);
$this->offset=($this->nowindex-1)*$perpage;
if(!empty($array['ajax']) )$this->open_ajax($array['ajax']);//Open AJAX mode
}
/**
* Set the value of the specified variable name in the class. If the change does not belong to this class, an exception will be thrown
*
* @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!");
}

}
/**
* Turn on reverse AJAX mode
*
* @param string $action The default ajax triggered action.
*/
function open_ajax($action)
{
$this->is_ajax=true;
$this->ajax_action_name=$action;
}
/**
* Get the code to display "next page"
*
* @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 .'';
}

/**
* Get the code to display "previous page"
*
* @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.'';
}

/**
* Get the code to display "Home Page"
*
* @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);
}

/**
* Get the code to display the "last page"
*
* @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('

class=".$nowindex_style.">'.$i.'');
   }else{
    break;
   }
   $return.="n";
}
unset($begin);
return $return;
}
/**
* Get the code to display the jump button
*
* @return string
*/
function select()
{
   $return='';
for($i=1;$i<=$this->totalpage;$i++)
{
   if($i==$this->nowindex){
    $return.=''.$i.'';
   }else{
    $return.=''.$i.'';
   }
}
unset($i);
$return.='';
return $return;
}

/**
* Get the value required for limit in the mysql tutorial statement
*
* @return string
*/
function offset()
{
return $this->offset;
}

/**
* Control paging display style
*
* @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 $this->first_page().$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 $this->pre_page().$this->nowbar().$this->next_page();
    break;
   case '5':
    return $this->pre_bar().$this->pre_page().$this->nowbar().$this->next_page

().$this->next_bar();
    break;
}

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

------------------------*/
/**
* Set url header address
* @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  
   }//end if
}//end if
}

/**
* Set the current page
*
*/
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);
}
}

/**
* Return the address value for the specified page
*
* @param int $pageno
* @return string $url
*/
function _get_url($pageno=1)
{
return $this->url.$pageno;
}

/**
* Get pagination display text, for example, by default _get_text('1') will return [

href="" >1]
*
* @param String $str
* @return string $url
*/
function _get_text($str)
{
return $this->format_left.$str.$this->format_right;
}

/**
* Get link address
*/
function _get_link($url,$text,$style=''){
$style=(empty($style))?'':'class="'.$style.'"';
if($this->is_ajax){
      //如果是使用AJAX模式
   return ''.$text.'';
}else{
   return ''.$text.'';
}
}
/**
* Error handling methods
*/
function error($function,$errormsg)
{
     die('Error in file '.__FILE__.' ,Function '.$function.'()

:'.$errormsg);
}
}
$page=new page(array('total'=>1000,'perpage'=>20));
echo 'mode:1
'.$page->show();
echo '

---

mode:2
'.$page->show(2);
echo '

---

mode:3
'.$page->show(3);
echo '

---

mode:4
'.$page->show(4);
echo '

---

开始AJAX模式:';
$ajaxpage=new page(array

('total'=>1000,'perpage'=>20,'ajax'=>'ajax_page','page_name'=>'test'));
echo 'mode:1
'.$ajaxpage->show();
?>