PHP封装的分页类与简单用法示例

<?php
//showPage(页号，总页数，分隔符)
function showPage($page,$totalPage,$sep=" "){
  $url = $_SERVER ['PHP_SELF'];      //获取当前路径
  $index = ($page == 1) ? "首页" : "<a href='{$url}?page=1'>首页</a>";
  $last = ($page == $totalPage) ? "尾页" : "<a href='{$url}?page={$totalPage}'>尾页</a>";
  $prevPage=($page>=1)?$page-1:1;
  $nextPage=($page>=$totalPage)?$totalPage:$page+1;
  $prev = ($page == 1) ? "上一页" : "<a href='{$url}?page={$prevPage}'>上一页</a>";
  $next = ($page == $totalPage) ? "下一页" : "<a href='{$url}?page={$nextPage}'>下一页</a>";
  $str = "总共{$totalPage}页/当前是第{$page}页";
  $p="";
  for($i = 1; $i <= $totalPage; $i ++) {
    //当前页无连接
    if ($page == $i) {
      $p .= "[{$i}]";
    } else {
      $p .= "<a href='{$url}?page={$i}'>[{$i}]</a>";
    }
  }
  $pageStr=$str.$sep . $index .$sep. $prev.$sep . $p.$sep . $next.$sep . $last;
  return $pageStr;  //返回分页字符串
}

<?php
include "../mysql.php";
include "../page.php";
//连接数据库
$conn=new Mysql();
//
$pageSize=2;    //每页显示的记录数
$sql="select * from user;";
$totalRows=$conn->getResultNum($sql);  //总记录数
$totalPage=ceil($totalRows/$pageSize); //总页数
$page=isset($_REQUEST['page'])?(int)$_REQUEST['page']:1;//当前页数
if($page<1||$page==null||!is_numeric($page)){
  $page=1;
}
if($page>=$totalPage)$page=$totalPage;
$offset=($page-1)*$pageSize;
$sql="select * from user limit {$offset},{$pageSize}";
$result=$conn->sql($sql);
echo "<table style='text-align: center'>";
echo "<tr><td>用户名</td><td>密码</td><td>性别</td><td>邮箱</td></tr>";
foreach ($result as $k=>$v)
{
  echo "<tr><td>{$v['name']}</td>";
  echo "<td>"."{$v['password']}"."</td>";
  echo "<td>{$v['sex']}</td>";
  echo "<td>{$v['email']}</td></tr>";
}
echo "</table>";
echo showPage($page,$totalPage);    //输出页码链接
echo"<hr/>";
//关闭数据库
$conn->close();