2019独角兽企业重金招聘Python工程师标准>>>  
分页公式:页数=(总记录数-1)/每页显示记录数+1;
借助这个公式,实现以下分页类;
<?php
class Fpage{private $total; //数据表中总记录数
private $listRows; //每页显示的行数
private $limit;
private $uri;
private $pageNum; //行数
private $config = array("header"=>"记录","pre"=>"上一页","next"=>"下一页","first"=>"首页",
"last"=>"尾页");
public function __construct($total,$listRows=5){
$this->total = $total;
$this->listRows = $listRows;
$this->uri = $this->getUri();
$this->page = !empty($_GET['page'])?$_GET['page']:1;
$this->pageNum = ceil($this->total/$this->listRows);
$this->limit = $this->setLimit();
}
private function setLimit(){
return "Limit ".($this->page - 1)*$this->listRows.",{$this->listRows}";
}
private function getUri(){
$url = $_SERVER["REQUEST_URI"].(strpos($_SERVER["REQUEST_URI"],'?')?'':"?");
$parse = parse_url($url);
if(isset($parse["query"])){
parse_str($parse["query"],$params);
unset($params['page']);
$url = $parse['path'].'?'.http_build_query($params);
}
return $url;
}
public function __get($args){
if($args == "limit"){
return $this->limit;
}
else{
return null;
}
}
private function start(){
if($this->total == 0){
return 0;
}
else{
return ($this->page - 1)*$this->listRows + 1;
}
}
private function end(){
return min($this->page*$this->listRows,$this->total);
}
private function first(){
if($this->page == 1){
$html .='';
}
else{
$html.="  <a href='{$this->uri}&page=1'>{$this->config['first']}</a>  ";
}
return $html;
}
private function pre(){
if($this->page == 1){
$html .='';
}
else{
$html.="  <a href='{$this->uri}&page=".($this->page-1)."'>{$this->config['pre']}</a>  ";
}
return $html;
}
private function next(){
if($this->page == $this->pageNum){
$html .='';
}
else{
$html.="  <a href='{$this->uri}&page=".($this->page+1)."'>{$this->config['next']}</a>  ";
}
return $html;
}
private function last(){
if($this->page == $this->pageNum){
$html .='';
}
else{
$html.="  <a href='{$this->uri}&page={$this->pageNum}'>{$this->config['last']}</a>  ";
}
return $html;
}
private function pageList(){
$pageLink = '';
$inum = floor($this->pageNum/2);
for($i=$inum;$i>=1;$i--){
$page = $this->page-$i;
if($page<1)continue;
else{
$pageLink.=" <a href='{$this->uri}&page={$page}'>{$page}</a> ";
}
}
$pageLink.=" {$this->page} ";
for($i=1;$i<$inum;$i++){
$page = $this->page+$i;
if($page<=$this->pageNum){
$pageLink .= " <a href='{$this->uri}&page={$page}'>{$page}</a> ";
}
else break;
}
return $pageLink;
}
private function goPage(){
return '  <input type="text" οnkeydοwn="javascript:if(event.keyCode == 13){var page=(this.value>'.$this->pageNum.')?'.$this->pageNum.':this.value;location=\''.$this->uri.'&page=\'+page+\'\'}" style="width:35" value='.$this->page.'><input type="button" value="GO" οnclick="javascript:if(event.keyCode == 13){var page=(this.previousSibling.value>'.$this->pageNum.')?'.$this->pageNum.':this.previousSibling.value;location=\''.$this->uri.'&page=\'+page+\'\'}">  ';
}
public function fpage($display=array(0,1,2,3,4,5,6,7,8)){
$html[0]= "  共有<b>{$this->total}</b>条{$this->config['header']}  ";
$html[1]= "  每页显示<b>{$this->listRows}</b>条{$this->config['header']},
本页<b>{$this->start()}-{$this->end()}</b>条  ";
$html[2]="  <b>{$this->page}/{$this->pageNum}</b>页  ";
$html[3]=$this->first();
$html[4]=$this->pre();
$html[5]=$this->pageList();
$html[6]=$this->next();
$html[7]=$this->last();
$html[8]=$this->goPage();
foreach($display as $key){
$Fpage.=$html[$key];
}
return $Fpage;
}
}
?>
应用:
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
 <?php
     //自动加载函数类
     function __autoload($className){
         include strtolower($className).'.class.php';    
     }
     
     $link = mysql_connect("localhost","user","password") or die ("链接用户失败");
     @$db = mysql_select_db("dbname") or die("链接数据库失败");
     
     $result = mysql_query("select * from shops");
     $total = mysql_num_rows($result);
     
     $num = 5;
     
     $page = new Fpage($total,$num);
     $sql = "select * from shops {$page->limit}";
     $result = mysql_query($sql) or die ("操作错误");
     $cols = mysql_num_fields($result);
     
     echo "<table align='center' border='2' width='900'>";
     echo "<caption><h1>SHOPS</h1></caption>";
     
     echo '<tr>';
         for($i=0;$i<$cols;$i++){        
             echo '<th>'.mysql_field_name($result,$i).'</th>';
         }
     echo '</tr>';
         
     while($rows=mysql_fetch_assoc($result)){
         echo "<tr>";
         echo "<td>".$rows['id']."</td>";
         echo "<td>".$rows['name']."</td>";
         echo "<td>".$rows['dates']."</td>";
         echo "<td>".$rows['price']."</td>";
         echo "<td>".$rows['desnc']."</td>";
         echo "</tr>";
             
     }
     
     echo "<tr><td colspan='5' align='right'>".$page->fpage(array(3,4,5,6,7,8,0,1,2))."</td></tr>";
     echo "</table>";
 ?>