個人寫的一個簡單通用分頁類

個人學習php所寫簡單分頁類,通用性比較強

/**
* 簡單分頁類
* @author:phpprince
* @QQ: 8923052
* @date: 2014-04-22 21:08:35
*/
class Page{
 protected $url; //位址
 protected $allnum; / /總記錄數
 protected $current; //目前頁碼
 protected $pagesize; //每頁顯示多少筆記錄
 protected $postfix; //後字
 protected $style; //顯示樣式共3種樣式,1 2 3 分別表示前5後4,前3後3,前4後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;
 }

 //取得總頁數
 protected function maxPageNum(){
 $max=ceil($this->allnum/$this->pagesize);
 //頁碼超限校正
 if($this->current>$this->current>$this->current>$this->current>$this->current>$ max){
 $this->current=$max;
 }
 if($this->current $this->current=1;
 }
 return $max;
 }

 //取得第一頁連結完整html str
 protected function firstUrl(){
 if($this->current!=1)
 {
 return '首頁';
 }else{
 return '首頁';
 }
 }

 //取得上一頁連結完整html str
 protected function prevUrl(){
 if($this->current $fullurl='上一頁';
 }else{
 $fullurl=$this->url.($this->current-1).$this->postfix;
 $fullurl='上頁';
 }
 return $fullurl;
 }

 //取得下一頁連結完整html str
 protected function nextUrl(){
 if($this->current>= $this->maxPageNum()){
 $fullurl='下一頁';
 }else{
 $ fullurl=$this->url.($this->current 1).$this->postfix;
 $fullurl='下一頁';
 }
 return $fullurl;
 }

 //取得最後一頁鏈接完整html str
 protected function lastUrl(){
 if($this->current>=$this->maxPageNum()){
 $fullurl='末頁';
 }else{
 $fullurl=$this->url.$this->maxPageNum().$this->postfix;
 $fullurl ='末頁';
 }
 return $fullurl;
 }

 //取得指定頁碼完整url
 protected function getUrl($pageno){
 return $this->url.$pageno.$this->postfix;
 }

 //指定顯示樣式
 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);
 }

 //取得中間URL 1 2 3 4 5 ⑥ 7 8 9 10
 protected function getMiddelUrl(){
 $max=$this ->maxPageNum(); //先取得總頁,可校正目前頁超限問題
 $current=$this->current; //目前頁碼必須合法,才能保證下面的頁碼範圍一定正確
 //得到目前樣式
 list($before,$after)=$this->getStyle();
 $startno=$current-$before; //起始頁碼
 $endno=$current $after; //終止頁碼

 //為保證輸出始終符合要求,在頁面不超限前提下,起始頁增加,則終止頁必須增加,反之同理.
 while( $endno>$max||$startno if($endno>$max){ //終止頁碼超界
 $endno--;
 if($startno>1){
 $startno--;
 }
 }
 if($startno $startno ;
 if($endno $endno ;
 }
 }
 }
 $str=''; //用來儲存整個html str
 for($i=$startno;$i $currenturl=$ this->getUrl($i);
 if($i!=$current){
 $str.="{$i}" ;
 }else{
 $str.=''.$i.'';
 }
 }
 return $str;
 }

 //回傳完整分頁html字串
 public function getPageStr(){
 $str='' .$this->firstUrl().$this->prevUrl();
 $str.=$this->getMiddelUrl();
 $str.=$this->nextUrl().$this- >lastUrl().'共'.$this->maxPageNum().'頁'.$this->allnum.'條

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