让人崩溃的 AJAX模式下的分页<?php002/**003演示004require_once('../libs/classes/page.class.php');005$page=new page(array('total'=>1000,'perpage'=>20));006echo 'mode:1<br>'.$page->show();007echo '<hr>mode:2<br>'.$page->show(2);008echo '<hr>mode:3<br>'.$page->show(3);009echo '<hr>mode:4<br>'.$page->show(4);010echo '<hr>开始AJAX模式:';011$ajaxpage=new page(array('total'=>1000,'perpage'=>20,'ajax'=>'ajax_page','page_name'=>'test'));012echo 'mode:1<br>'.$ajaxpage->show();013*/014classminupage015{016/**017* config ,public018*/019var$page_name="p";//page标签，用来控制url页。比如说xxx.php?PB_page=2中的PB_page020var$next_page='>';//下一页021var$pre_page='<';//上一页022var$first_page='First';//首页023var$last_page='Last';//尾页024var$pre_bar='<<';//上一分页条025var$next_bar='>>';//下一分页条026var$format_left='[';027var$format_right=']';028var$is_ajax=false;//是否支持AJAX分页模式029030/**031* private032*033*/034var$pagebarnum=10;//控制记录条的个数。035var$totalpage=0;//总页数036var$ajax_action_name='';//AJAX动作名037var$nowindex=1;//当前页038var$url="";//url地址头039var$offset=0;040041/**042* constructor构造函数043*044* @param array $array['total'],$array['perpage'],$array['nowindex'],$array['url'],$array['ajax']...045*/046functionminupage($array)047{048if(is_array($array)){049 if(!array_key_exists('total',$array))$this->error(__FUNCTION__,'need a param of total');050 $total=intval($array['total']);051 $perpage=(array_key_exists('perpage',$array))?intval($array['perpage']):10;052 $nowindex=(array_key_exists('nowindex',$array))?intval($array['nowindex']):'';053 $url=(array_key_exists('url',$array))?$array['url']:'';054}else{055 $total=$array;056 $perpage=10;057 $nowindex='';058 $url='';059}060if((!is_int($total))||($total<0))$this->error(__FUNCTION__,$total.' is not a positive integer!');061if((!is_int($perpage))||($perpage<=0))$this->error(__FUNCTION__,$perpage.' is not a positive integer!');062if(!empty($array['page_name']))$this->set('page_name',$array['page_name']);//设置pagename063$this->_set_nowindex($nowindex);//设置当前页064$this->_set_url($url);//设置链接地址065$this->totalpage=ceil($total/$perpage);066$this->offset=($this->nowindex-1)*$perpage;067if(!empty($array['ajax']))$this->open_ajax($array['ajax']);//打开AJAX模式068}069/**070* 设定类中指定变量名的值，如果改变量不属于这个类，将throw一个exception071*072* @param string $var073* @param string $value074*/075functionset($var,$value)076{077if(in_array($var,get_object_vars($this)))078 $this->$var=$value;079else{080 $this->error(__FUNCTION__,$var." does not belong to PB_Page!");081}082083}084/**085* 打开倒AJAX模式086*087* @param string $action 默认ajax触发的动作。088*/089functionopen_ajax($action)090{091$this->is_ajax=true;092$this->ajax_action_name=$action;093}094/**095* 获取显示"下一页"的代码096*097* @param string $style098* @return string099*/100functionnext_page($style='')101{102if($this->nowindex<$this->totalpage){103 return$this->_get_link($this->_get_url($this->nowindex+1),$this->next_page,$style);104}105return'<span class="'.$style.'">'.$this->next_page.'</span>';106}107108/**109* 获取显示“上一页”的代码110*111* @param string $style112* @return string113*/114functionpre_page($style='')115{116if($this->nowindex>1){117 return$this->_get_link($this->_get_url($this->nowindex-1),$this->pre_page,$style);118}119return'<span class="'.$style.'">'.$this->pre_page.'</span>';120}121122/**123* 获取显示“首页”的代码124*125* @return string126*/127functionfirst_page($style='')128{129if($this->nowindex==1){130 return '<span class="'.$style.'">'.$this->first_page.'</span>';131}132return$this->_get_link($this->_get_url(1),$this->first_page,$style);133}134135/**136* 获取显示“尾页”的代码137*138* @return string139*/140functionlast_page($style='')141{142if($this->nowindex==$this->totalpage){143 return '<span class="'.$style.'">'.$this->last_page.'</span>';144}145return$this->_get_link($this->_get_url($this->totalpage),$this->last_page,$style);146}147148functionnowbar($style='',$nowindex_style='')149{150$plus=ceil($this->pagebarnum/2);151if($this->pagebarnum-$plus+$this->nowindex>$this->totalpage)$plus=($this->pagebarnum-$this->totalpage+$this->nowindex);152$begin=$this->nowindex-$plus+1;153$begin=($begin>=1)?$begin:1;154$return='';155for($i=$begin;$i<$begin+$this->pagebarnum;$i++)156{157 if($i<=$this->totalpage){158 if($i!=$this->nowindex)159 $return.=$this->_get_text($this->_get_link($this->_get_url($i),$i,$style));160 else161 $return.=$this->_get_text('<span class="'.$nowindex_style.'">'.$i.'</span>');162 }else{163 break;164 }165 $return.="\n";166}167unset($begin);168return$return;169}170/**171* 获取显示跳转按钮的代码172*173* @return string174*/175functionselect($url)176{177$return='<select name=";PB_Page_Select" >';178for($i=1;$i<=$this->totalpage;$i++)179{180 if($i==$this->nowindex){181 $return.='<option value='.$url.$i.' selected>'.$i.'</option>';182 }else{183 $return.='<option value='.$url.$i.'>'.$i.'</option>';184 }185}186unset($i);187$return.='</select>';188return$return;189}190191/**192* 获取mysql 语句中limit需要的值193*194* @return string195*/196functionoffset()197{198return$this->offset;199}200201/**202* 控制分页显示风格（你可以增加相应的风格）203*204* @param int $mode205* @return string206*/207functionshow($mode=1,$url='')208{209switch($mode)210{211 case'1':212 $this->next_page='下一页';213 $this->pre_page='上一页';214 return $this->pre_page().$this->nowbar().$this->next_page().'第'.$this->select($url).'页';215 break;216 case'2':217 $this->next_page='下一页';218 $this->pre_page='上一页';219 $this->first_page='首页';220 $this->last_page='尾页';221 return $this->first_page().$this->pre_page().'[第'.$this->nowindex.' 页]'.$this->next_page().$this->last_page().'第 '.$this->select($url).'页';222 break;223 case'3':224 $this->next_page='下一页';225 $this->pre_page='上一页';226 $this->first_page='首页';227 $this->last_page='尾页';228 return $this->first_page().$this->pre_page().$this->next_page().$this->last_page();229 break;230 case'4':231 $this->next_page='下一页';232 $this->pre_page='上一页';233 return $this->pre_page().$this->nowbar().$this->next_page();234 break;235 case'5':236 return $this->pre_bar().$this->pre_page().$this->nowbar().$this->next_page().$this->next_bar();237 break;238}239240}241/*----------------private function (私有方法)-----------------------*/242/**243* 设置url头地址244* @param: String $url245* @return boolean246*/247function_set_url($url="")248{249if(!empty($url)){250 //手动设置251 $this->url=$url.((stristr($url,'?'))?'&':'?').$this->page_name."=";252}else{253 //自动获取254 if(empty($_SERVER['QUERY_STRING'])){255 //不存在QUERY_STRING时256 $this->url=$_SERVER['REQUEST_URI']."?".$this->page_name."=";257 }else{258 //259 if(stristr($_SERVER['QUERY_STRING'],$this->page_name.'=')){260 //地址存在页面参数261 $this->url=str_replace($this->page_name.'='.$this->nowindex,'',$_SERVER['REQUEST_URI']);262 $last=$this->url[strlen($this->url)-1];263 if($last=='?'||$last=='&'){264 $this->url.=$this->page_name."=";265 }else{266 $this->url.='&'.$this->page_name."=";267 }268 }else{269 //270 $this->url=$_SERVER['REQUEST_URI'].'&'.$this->page_name.'=';271 }//end if 272 }//end if273}//end if274}275276/**277* 设置当前页面278*279*/280function_set_nowindex($nowindex)281{282if(empty($nowindex)){283 //系统获取284 285 if(isset($_GET[$this->page_name])){286 $this->nowindex=intval($_GET[$this->page_name]);287 }288}else{289 //手动设置290 $this->nowindex=intval($nowindex);291}292}293294/**295* 为指定的页面返回地址值296*297* @param int $pageno298* @return string $url299*/300function_get_url($pageno=1)301{302return$this->url.$pageno;303}304305/**306* 获取分页显示文字，比如说默认情况下_get_text('<a href="">1</a>')将返回[<a href="">1</a>]307*308* @param String $str309* @return string $url310*/311function_get_text($str)312{313return$this->format_left.$str.$this->format_right;314}315316/**317 * 获取链接地址318*/319function_get_link($url,$text,$style=''){320$style=(empty($style))?'':'class="'.$style.'"';321if($this->is_ajax){322 //如果是使用AJAX模式323 return'<a '.$style.' href="javascript:'.$this->ajax_action_name.'(\''.$url.'\')">'.$text.'</a>';324}else{325 return'<a '.$style.' href="'.$url.'">'.$text.'</a>';326}327}328/**329 * 出错处理方式330*/331functionerror($function,$errormsg)332{333 die('Error in file <b>'.__FILE__.'</b> ,Function <b>'.$function.'()</b> :'.$errormsg);334}335}336?>
