1 <?php  2 namespace Components;  3   4 class Page {  5     private $total; //数据表中总记录数  6     private $listRows; //每页显示行数  7     private $limit;  8     private $uri;  9     private $pageNum; //页数 10     private $config=array(‘header‘=>"个记录", "prev"=>"上一页", "next"=>"下一页", "first"=>"首 页", "last"=>"尾 页"); 11     private $listNum=8; 12     /* 13      * $total 14      * $listRows 15      */ 16     public function __construct($total, $listRows=10, $pa=""){ 17         $this->total=$total; 18         $this->listRows=$listRows; 19         $this->uri=$this->getUri($pa); 20         $this->page=!empty($_GET["page"]) ? $_GET["page"] : 1; 21         $this->pageNum=ceil($this->total/$this->listRows); 22         $this->limit=$this->setLimit(); 23     } 24  25     private function setLimit(){ 26         return "Limit ".($this->page-1)*$this->listRows.", {$this->listRows}"; 27     } 28  29     private function getUri($pa){ 30         $url=$_SERVER["REQUEST_URI"].(strpos($_SERVER["REQUEST_URI"], ‘?‘)?‘‘:"?").$pa; 31         $parse=parse_url($url); 32  33  34  35         if(isset($parse["query"])){ 36             parse_str($parse[‘query‘],$params); 37             unset($params["page"]); 38             $url=$parse[‘path‘].‘?‘.http_build_query($params); 39  40         } 41  42         return $url; 43     } 44  45     function __get($args){ 46         if($args=="limit") 47             return $this->limit; 48         else 49             return null; 50     } 51  52     private function start(){ 53         if($this->total==0) 54             return 0; 55         else 56             return ($this->page-1)*$this->listRows+1; 57     } 58  59     private function end(){ 60         return min($this->page*$this->listRows,$this->total); 61     } 62  63     private function first(){ 64         $html = ""; 65         if($this->page==1) 66             $html.=‘‘; 67         else 68             $html.="&nbsp;&nbsp;<a href=http://www.mamicode.com/‘{$this->uri}&page=1‘>{$this->config["first"]}</a>&nbsp;&nbsp;"; 69  70         return $html; 71     } 72  73     private function prev(){ 74         $html = ""; 75         if($this->page==1) 76             $html.=‘‘; 77         else 78             $html.="&nbsp;&nbsp;<a href=http://www.mamicode.com/‘{$this->uri}&page=".($this->page-1)."‘>{$this->config["prev"]}</a>&nbsp;&nbsp;"; 79  80         return $html; 81     } 82  83     private function pageList(){ 84         $linkPage=""; 85  86         $inum=floor($this->listNum/2); 87  88         for($i=$inum; $i>=1; $i--){ 89             $page=$this->page-$i; 90  91             if($page<1) 92                 continue; 93  94             $linkPage.="&nbsp;<a href=http://www.mamicode.com/‘{$this->uri}&page={$page}‘>{$page}</a>&nbsp;"; 95  96         } 97  98         $linkPage.="&nbsp;{$this->page}&nbsp;"; 99 100 101         for($i=1; $i<=$inum; $i++){102             $page=$this->page+$i;103             if($page<=$this->pageNum)104                 $linkPage.="&nbsp;<a href=http://www.mamicode.com/‘{$this->uri}&page={$page}‘>{$page}</a>&nbsp;";105             else106                 break;107         }108 109         return $linkPage;110     }111 112     private function next(){113         $html = "";114         if($this->page==$this->pageNum)115             $html.=‘‘;116         else117             $html.="&nbsp;&nbsp;<a href=http://www.mamicode.com/‘{$this->uri}&page=".($this->page+1)."‘>{$this->config["next"]}</a>&nbsp;&nbsp;";118 119         return $html;120     }121 122     private function last(){123         $html = "";124         if($this->page==$this->pageNum)125             $html.=‘‘;126         else127             $html.="&nbsp;&nbsp;<a href=http://www.mamicode.com/‘{$this->uri}&page=".($this->pageNum)."‘>{$this->config["last"]}</a>&nbsp;&nbsp;";128 129         return $html;130     }131 132     private function goPage(){133         return ‘&nbsp;&nbsp;<input type="text" onkeydown="javascript:if(event.keyCode==13){var page=(this.value>‘.$this->pageNum.‘)?‘.$this->pageNum.‘:this.value;location=\‘‘.$this->uri.‘&page=\‘+page+\‘\‘}" value="http://www.mamicode.com/‘.$this->page.‘" style="width:25px"><input type="button" value="http://www.mamicode.com/GO" onclick="javascript:var page=(this.previousSibling.value>‘.$this->pageNum.‘)?‘.$this->pageNum.‘:this.previousSibling.value;location=\‘‘.$this->uri.‘&page=\‘+page+\‘\‘">&nbsp;&nbsp;‘;134     }135     function fpage($display=array(0,1,2,3,4,5,6,7,8)){136         $html[0]="&nbsp;&nbsp;共有<b>{$this->total}</b>{$this->config["header"]}&nbsp;&nbsp;";137         $html[1]="&nbsp;&nbsp;每页显示<b>".($this->end()-$this->start()+1)."</b>条，本页<b>{$this->start()}-{$this->end()}</b>条&nbsp;&nbsp;";138         $html[2]="&nbsp;&nbsp;<b>{$this->page}/{$this->pageNum}</b>页&nbsp;&nbsp;";139 140         $html[3]=$this->first();141         $html[4]=$this->prev();142         $html[5]=$this->pageList();143         $html[6]=$this->next();144         $html[7]=$this->last();145         $html[8]=$this->goPage();146         $fpage=‘‘;147         foreach($display as $index){148             $fpage.=$html[$index];149         }150 151         return $fpage;152 153     }154 155 156     }