Two super PHP paging code_PHP tutorial

Two super PHP tutorial pagination codes

/**
* description: Super powerful paging class, four paging modes, the default paging style is similar to Baidu and Google.
* Added features in 2.0: supports custom styles, custom styles, supports both php4 and php5,
* example:
* Four paging modes:
* require_once('../libs /classes/page.class.php');
* $page=new page(array('total'=>1000,'perpage'=>20));
* echo 'mode:1< ;br>'.$page->show();
* echo '

---

mode:2
'.$page->show(2);
* echo '< hr>mode:3
'.$page->show(3);
* echo '

---

mode:4
'.$page->show(4);
* Enable ajax:
* $ajaxpage=new page(array('total'=>1000,'perpage'=>20,'ajax'=>'ajax_page','page_name'=>' test'));
* echo 'mode:1
'.$ajaxpage->show();
*/
class page
{
/**
  * config ,public
 */
var $page_name="page ";//page tag, used to control the url page. For example, page
in xxx.php?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 it is supported ajax paging mode

/**
  * 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'],$array['ajax']
 */
function page($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 link address
$this->totalpage=ceil($total/$perpage);
$this->offset=($this->nowindex-1) *$this->perpage;
if(!empty($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 the "Homepage"
*
* @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()
 {
  $return='';
  for($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 the corresponding 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)-----------------------------------------------------------*/
 /**
  * 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   
   }//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 methods
*/
 function error($function,$errormsg)
 {
     die('error in file '.__file__.' ,function '.$function.'() :'.$errormsg);
 }
}
?>

代码二

/**
* Get page number navigation html
* @param $pagenum: current page number
* @param $pagesize: number of pages per page
* @param $rowcount: total number of records
* @param $navurl : Link page url
*/
function getnavhtml($pagenum,$pagesize,$rowcount,$navurl){
$pagecount = (int)($rowcount/$pagesize); //Total number of pages
if ($rowcount % $pagesize >0){
$pagecount++;
}
if ($pagenum>$pagecount){
$pagenum = 1;
}
$firstnav = "Homepage ";
$lastnav = "Last page ";
$prevnav="";
$nextnav="";
if ($pagenum>1){
$navpagenum = $pagenum-1;
$prevnav = "Previous page ";
}
if ($pagenum<$pagecount && $pagecount>1){
$navpagenum = $pagenum+1;
$nextnav = "Next page ";
}
$amongnav="";

//Key loop

for ($i=1; $i<=5;$i++){
$navpagenum = $pagenum+ $i-3;
if ($navpagenum>0 && $navpagenum<=$pagecount){
$navcss tutorial= $navpagenum == $pagenum?" class="hover"":"";
$amongnav.="{$navpagenum}< /a> ";
}
}
return $firstnav.$prevnav.$amongnav.$nextnav.$lastnav." ".$pagenum."/".$pagecount." Total [". $rowcount."]data";
}
}

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