php 經典的分頁代碼類

代碼如下

複製代碼

class page{  var $page_name="page";  var $next_page='下一頁';  var $pre_page='上一頁';  var $first_page='首頁';  var $last_page='尾頁';  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))||($total<0))$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']);   $this->_set_nowindex($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->nowindex<$this->totalpage){   return $this->_get_link($this->_get_url($this->nowindex+1),$this->next_page,$style);  }  return '<a class="'.$style.'">'.$this->next_page.'</a>';  }  function pre_page($style=''){   if($this->nowindex>1){     return $this->_get_link($this->_get_url($this->nowindex-1),$this->pre_page,$style);   }   return '<a class="'.$style.'">'.$this->pre_page.'</a>';  }  function first_page($style=''){   if($this->nowindex==1){      return '<a class="'.$style.'">'.$this->first_page.'</a>';   }   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 '<a class="'.$style.'">'.$this->last_page.'</a>';   }   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('<a class="'.$nowindex_style.'">'.$i.'</a>');    }else{     break;    }    $return.=" ";   }   unset($begin);   return $return;  }  /**   * 擷取顯示跳轉按鈕的代碼   *   * @return string   */  function select()  {    $return='<select name="pb_page_select">';   for($i=1;$i<=$this->totalpage;$i++)   {    if($i==$this->nowindex){     $return.='<option value="'.$i.'" selected>'.$i.'</option>';    }else{     $return.='<option value="'.$i.'">'.$i.'</option>';    }   }   unset($i);   $return.='</select>';   return $return;  }    /**   * 擷取mysql教程 語句中limit需要的值   *   * @return string   */  function offset()  {   return $this->offset;  }    /**   * 控制分頁顯示風格（你可以增加相應的風格）   *   * @param int $mode   * @return string   */  function show($mode=1)  {   switch ($mode)   {    case '1':     $this->next_page='下一頁';     $this->pre_page='上一頁';     return $this->pre_page().$this->nowbar().$this->next_page().'第'.$this->select().'頁';     break;    case '2':     $this->next_page='下一頁';     $this->pre_page='上一頁';     $this->first_page='首頁';     $this->last_page='尾頁';     return $this->first_page().$this->pre_page().'[第'.$this->nowindex.'頁]'.$this->next_page().$this->last_page().'第'.$this->select().'頁';     break;    case '3':     $this->next_page='下一頁';     $this->pre_page='上一頁';     $this->first_page='首頁';     $this->last_page='尾頁';     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")."<a class="clear"></a>";     break;    case '4':     $this->next_page='下一頁';     $this->pre_page='上一頁';     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="'.$style.'"';   return '<a '.$style.' href="'.$url.'">'.$text.'</a>';  }  function error($function,$errormsg)  {      die('error in file <b>'.__file__.'</b> ,function <b>'.$function.'()</b> :'.$errormsg);  } } ?>