php分页类

  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             $html.="&nbsp;&nbsp;<a href=‘{$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             $html.="&nbsp;&nbsp;<a href=‘{$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             $linkPage.="&nbsp;<a href=‘{$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                 $linkPage.="&nbsp;<a href=‘{$this->uri}&page={$page}‘>{$page}</a>&nbsp;";
105             else
106                 break;
107         }
108 
109         return $linkPage;
110     }
111 
112     private function next(){
113         $html = "";
114         if($this->page==$this->pageNum)
115             $html.=‘‘;
116         else
117             $html.="&nbsp;&nbsp;<a href=‘{$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         else
127             $html.="&nbsp;&nbsp;<a href=‘{$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="‘.$this->page.‘" style="width:25px"><input type="button" value="GO" onclick="javascript:var page=(this.previousSibling.value>‘.$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     }