个人写的一个简单通用分页类

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发布： 2016-07-25 08:47:57

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个人学习php所写简单分页类,通用性比较强

/**
* 简单分页类
* @author:phpprince
* @QQ: 8923052
* @date: 2014-04-22 21:08:35
*/
class Page{
protected $url; //地址
protected $allnum; //总记录数
protected $current; //当前页码
protected $pagesize; //每页显示多少条记录
protected $postfix; //后缀
protected $style; //显示样式共3种样式,1 2 3 分别表示前5后4,前3后3,前4后4
public function __construct($url,$allnum,$current,$pagesize=10,$postfix='',$style=1){
$this->url=$url;
$this->allnum=$allnum;
$this->current=$current;
$this->pagesize=$pagesize;
$this->postfix=$postfix;
$this->style=$style;
}
//获取总页数
protected function maxPageNum(){
$max=ceil($this->allnum/$this->pagesize);
//页码超限校正
if($this->current>$max){
$this->current=$max;
}
if($this->current $this->current=1;
}
return $max;
}
//获得第一页链接完整html str
protected function firstUrl(){
if($this->current!=1)
{
return '首页';
}else{
return '首页';
}
}
//获得上一页链接完整html str
protected function prevUrl(){
if($this->current $fullurl='上一页';
}else{
$fullurl=$this->url.($this->current-1).$this->postfix;
$fullurl='上一页';
}
return $fullurl;
}
//获得下一页链接完整html str
protected function nextUrl(){
if($this->current>=$this->maxPageNum()){
$fullurl='下一页';
}else{
$fullurl=$this->url.($this->current+1).$this->postfix;
$fullurl='下一页';
}
return $fullurl;
}
//获得最后一页链接完整html str
protected function lastUrl(){
if($this->current>=$this->maxPageNum()){
$fullurl='末页';
}else{
$fullurl=$this->url.$this->maxPageNum().$this->postfix;
$fullurl='末页';
}
return $fullurl;
}
//获得指定页码完整url
protected function getUrl($pageno){
return $this->url.$pageno.$this->postfix;
}
//指定显示样式
protected function getStyle(){
switch($this->style){
case 1:
$before=5;
$after=4;
break;
case 2:
$before=3;
$after=3;
break;
case 3:
$before=4;
$after=4;
break;
default :
$before=5;
$after=4;
}
return array($before,$after);
}
//获得中间URL 1 2 3 4 5 ⑥ 7 8 9 10
protected function getMiddelUrl(){
$max=$this->maxPageNum(); //先获取总页,可校正当前页超限问题
$current=$this->current; //当前页码必须合法,才能保证下面的页码范围一定正确
//得到当前样式
list($before,$after)=$this->getStyle();
$startno=$current-$before; //起始页码
$endno=$current+$after; //终止页码
//为保证输出始终符合要求,在页面不超限前提下,起始页增加,则终止页必须增加,反之同理.
while($endno>$max||$startno if($endno>$max){ //终止页码超界
$endno--;
if($startno>1){
$startno--;
}
}
if($startno $startno++;
if($endno $endno++;
}
}
}
$str=''; //用于保存整个html str
for($i=$startno;$i $currenturl=$this->getUrl($i);
if($i!=$current){
$str.="{$i}";
}else{
$str.=''.$i.'';
}
}
return $str;
}
//返回完整分页html字符串
public function getPageStr(){
$str='
'.$this->firstUrl().$this->prevUrl();
$str.=$this->getMiddelUrl();
$str.=$this->nextUrl().$this->lastUrl().'共'.$this->maxPageNum().'页'.$this->allnum.'条

return $str;

}

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