9:
 10: class Page {
 11:   var $firstRow   = 0 ;  // 起始行
 12:   var $listRows   = 0 ;  // 每页显示列表行数
 13:   var $parameter  = "";  // 页数跳转时要带的参数
 14:   var $totalPages = 0 ;  // 总页数
 15:   var $totalRows  = 0 ;  // 总行数
 16:   var $nowPage    = 0 ;  // 当前页数
 17:   var $showPageJump = True; // 是否显示跳到第几页
 18:   var $coolPages  = 0 ;  // 分页的栏的总页数
 19:   var $rollPage   = 5;   // 分页栏每页显示的页数
 20:
 21:   /*--------------------------------------------------------------------------
 22:    功能：显示分页信息第 x 页 共 x 页 << < 6 7 8 9 10 > >>
 23:   -----------------------------------------------------------------------------*/
 24:    function prompt() {
 25: if(0 == $this->totalRows) {
 26: return;
 27: }
 28:      $this->totalPages=ceil($this->totalRows/$this->listRows); //总页数
 29: $this->coolPages = ceil($this->totalPages/$this->rollPage);
 30: if ( $this->firstRow >= $this->totalRows ) {  // 2003-12-30 17:18:29 kinger modified
 31: $this->nowPage = $this->totalPages;
 32: $this->firstRow = ($this->totalPages-1)*$this->listRows;
 33: } else {
 34: $this->nowPage=floor($this->firstRow/$this->listRows+1);    //当前页号
 35: }
 36: $nowCoolPage = ceil($this->nowPage/$this->rollPage);
 37:
 38: // << < > >>
 39: if($nowCoolPage == 1){
 40: $theFirst = "";
 41: $prePage = "";
 42: }else{
 43: $preRow =  ($this->rollPage*($nowCoolPage-1)-1)*$this->listRows;
 44: $prePage = "<a href='?firstRow=$preRow&totalRows=$this->totalRows&$this->parameter'><</a>";
 45: $theFirst = "<a href='?firstRow=0&totalRows=$this->totalRows&$this->parameter'><<</a>";
 46: }
 47: if($nowCoolPage == $this->coolPages){
 48: $nextPage = "";
 49: $theEnd="";
 50: }else{
 51: $nextRow = ($nowCoolPage*$this->rollPage)*$this->listRows;
 52: $theEndRow = ($this->totalPages-1)*$this->listRows;
 53: $nextPage = "<a href='?firstRow=$nextRow&totalRows=$this->totalRows&$this->parameter'>></a>";
 54: $theEnd = "<a href='?firstRow=$theEndRow&totalRows=$this->totalRows&$this->parameter'>>></a>";
 55: }
 56: // 1 2 3 4 5
 57: $linkPage = "";
 58: for($i=1;$i<=$this->rollPage;$i++){
 59: $page=($nowCoolPage-1)*$this->rollPage+$i;
 60: $rows=($page-1)*$this->listRows;
 61: if($page!=$this->nowPage){
 62: if($page<=$this->totalPages){
 63: $linkPage .= " <a href='?firstRow=$rows&totalRows=$this->totalRows&$this->parameter'>".$page."</a>";
 64: }else{
 65: break;
 66: }
 67: }else{
 68: if($this->totalPages != 1){
 69: $linkPage .= " [<b>".$page."</b>]";
 70: }
 71: }
 72: }
 73: $pageStr = "共 $this->totalPages 页  ".$theFirst." ".$prePage." ".$linkPage." ".$nextPage." ".$theEnd;
 74: return $pageStr;
 75:    }
 76:   /*-----------------------------------------------------------------------
 77:    使用举例。
 78:       --------------------------------------------------------------------
 79:   $page = new Page();
 80:   if ($totalRows){
 81:      $page->totalRows=$totalRows;
 82:    }else{
 83:                      //此处为计算查询个数，视不同的数据库方式有所不同
 84:      $page->totalRows=$db->count($db->select("user","*"););
 85:    }
 86:   $page->listRows="2";
 87:   if ($firstRow){
 88:      $page->firstRow=$firstRow;
 89:    }else{
 90:      $page->firstRow=0;   
 91:    }
 92:   $db->select("user","*","","","$page->firstRow,$page->listRows");
 93:   while($db->nextRecord()) {
 94: echo $db->record[id]." ";
 95: echo $db->record[name]." ";
 96:     echo $db->record[age]." ";
 97: echo "<br>";
 98:    }
 99:   $pager=$page->prompt();
100:   -------------------------------------------------------------------------------*/
101: }
102: ?>

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