PHP classic paging implementation code_PHP tutorial

This paging class supports the display of 11/20 pages, a total of 400 records, 20 records/page, previous page 11 12 13 14 1. This form, such as the page tag, is used to control the url page. For example, PB_page in xxx.php?PB_page=2 supports the previous page, next page, last page, and home page at the same time, and can automatically obtain the url parameter for pagination.

This paging class supports the display of 11/20 pages, a total of 400 records, 20 records/page, previous page 11 12 13 14 1. This form, such as the page tag, is used to control the url page. For example, pb_page in the xxx.php tutorial?pb_page=2 supports the previous page, next page, last page, and home page at the same time, and can automatically obtain the url parameter for pagination.

*/
class minupage
{
/**
   * config ,public
  */
var $page_name="p";//page tag, used to control the url page. For example, pb_page
in xxx.php?pb_page=2 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 number of record bars.
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'],$array['ajax']...
  */
function minupage($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 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 $action Default ajax triggered action.
​*/
function open_ajax($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(''.$i.'');
   }else{
     break;
   }
   $return.="n";
   }
   unset($begin);
   return $return;
}
/**
* Get the code to display the jump button
*
* @return string
​*/
function select($url)
{
   $return='';
   for($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 (you can add corresponding styles)
*
* @param int $mode
* @return string
​*/
function show($mode=1,$url='')
{
   switch ($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($url).'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($url).'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 [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
*/
function error($function,$errormsg)
{
     die('error in file '.__file__.' ,function '.$function.'() :'.$errormsg);
}

/*
 * 计算前台页面的总页数
 * @param total  总记录数
 * @param num    每页的记录数
*/
function sumpage($total,$num)
{
  $nn=0;
  $nn=intval($total/$num);
  if((int)($total%$num)!=0)
  {
     $nn=$nn+1;
  }
  return $nn;
}

}

/*
前台代码调用
function minupage($array)     : 构造函数，参数( 数组(total总页数，perpage每页显示行数，nowindex当前页,url地址,ajax模式) )

使用案例：
$num=20;                          //设置每页显示的记录数
$p=isset($_get['p'])?intval($_get['p']):1;    //获得传递的值，为空时即为零
$total=newssum($sort);       //获得的记录总条数           
$page=new minupage(array('total'=>$total,'perpage'=>$num));    //调用分页类
$p_start=($p-1) * $num;           //计算当页开始的记录数   
$sumpage=&$page->sumpage($total,$num);  //总页数

/页 共条记录，条/页，show(4);?>   显示为   11/20 页次 共400条记录 20条/页  上一页 11 12 13 14 15 下一页

分页调用方法

require_once('../libs/www.bKjia.c0m/page.class.php');
$page=new minupage(array('total'=>1000,'perpage'=>20));
echo 'mode:1
'.$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:';
$ajaxpage=new minupage(array('total'=>1000,'perpage'=>20,'ajax'=>'ajax_page','page_name'=>'test'));
echo 'mode:1
'.$ajaxpage->show();
*/

 

http://www.bkjia.com/PHPjc/631722.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/631722.htmlTechArticleThis paging class supports display as 11/20 Pages Total 400 records 20 records/page Previous page 11 12 13 14 1 This form, such as the page tag, is used to control the url page. For example, PB_p in xxx.php?PB_page=2...