分页页码显示算法
</>code
- /**
- * 获取分页的HTML内容
- * @param integer $page 当前页
- * @param integer $pages 总页数
- * @param string $url 跳转url地址 最后的页数以 '&page=x' 追加在url后面
- *
- * @return string HTML内容;
- */
- public static function getPageHtml($page, $pages, $url){
- //最多显示多少个页码
- $_pageNum = 5;
- //当前页面小于1 则为1
- $page = $page<1?1:$page;
- //当前页大于总页数 则为总页数
- $page = $page > $pages ? $pages : $page;
- //页数小当前页 则为当前页
- $pages = $pages < $page ? $page : $pages;
- //计算开始页
- $_start = $page - floor($_pageNum/2);
- $_start = $_start<1 ? 1 : $_start;
- //计算结束页
- $_end = $page + floor($_pageNum/2);
- $_end = $_end>$pages? $pages : $_end;
- //当前显示的页码个数不够最大页码数,在进行左右调整
- $_curPageNum = $_end-$_start+1;
- //左调整
- if($_curPageNum<$_pageNum && $_start>1){
- $_start = $_start - ($_pageNum-$_curPageNum);
- $_start = $_start<1 ? 1 : $_start;
- $_curPageNum = $_end-$_start+1;
- }
- //右边调整
- if($_curPageNum<$_pageNum && $_end<$pages){
- $_end = $_end + ($_pageNum-$_curPageNum);
- $_end = $_end>$pages? $pages : $_end;
- }
- $_pageHtml = '<ul class="pagination">';
- /*if($_start == 1){
- $_pageHtml .= '<li><a title="第一页">«</a></li>';
- }else{
- $_pageHtml .= '<li><a title="第一页" href="'.$url.'&page=1">«</a></li>';
- }*/
- if($page>1){
- $_pageHtml .= '<li><a title="上一页" href="'.$url.'&page='.($page-1).'">«</a></li>';
- }
- for ($i = $_start; $i <= $_end; $i++) {
- if($i == $page){
- $_pageHtml .= '<li class="active"><a>'.$i.'</a></li>';
- }else{
- $_pageHtml .= '<li><a href="'.$url.'&page='.$i.'">'.$i.'</a></li>';
- }
- }
- /*if($_end == $pages){
- $_pageHtml .= '<li><a title="最后一页">»</a></li>';
- }else{
- $_pageHtml .= '<li><a title="最后一页" href="'.$url.'&page='.$pages.'">»</a></li>';
- }*/
- if($page<$_end){
- $_pageHtml .= '<li><a title="下一页" href="'.$url.'&page='.($page+1).'">»</a></li>';
- }
- $_pageHtml .= '</ul>';
- echo $_pageHtml;
- }
其它:
<?php// 数据库连接常量define('DB_HOST', 'localhost');define('DB_USER', 'root');define('DB_PWD', '');define('DB_NAME', 'guest');// 连接数据库function conn(){$conn = mysqli_connect(DB_HOST, DB_USER, DB_PWD, DB_NAME);mysqli_query($conn, "set names utf8");return $conn;}//获得结果集function doresult($sql){$result=mysqli_query(conn(), $sql);return $result;}//结果集转为对象集合function dolists($result){return mysqli_fetch_array($result, MYSQL_ASSOC);}function totalnums($sql) {$result=mysqli_query(conn(), $sql);return $result->num_rows;}// 关闭数据库function closedb(){if (! mysqli_close()) {exit('关闭异常');}}?>
单实现了翻页功能,数据库请自行配置结构<?phpinclude 'mysqli.func.php';// 总记录数$sql = "SELECT dg_id FROM tb_user ";$totalnums = totalnums($sql);// 每页显示条数$fnum = 8;// 翻页数$pagenum = ceil($totalnums / $fnum);// 页数常量@$tmp = $_GET['page'];//防止恶意翻页if ($tmp > $pagenum)echo "<script>window.location.href='index.php'</script>";//计算分页起始值if ($tmp == "") {$num = 0;} else {$num = ($tmp - 1) * $fnum;}// 查询语句$sql = "SELECT dg_id,dg_username FROM tb_user ORDER BY dg_id DESC LIMIT " . $num . ",$fnum";$result = doresult($sql);// 遍历输出while (! ! $rows = dolists($result)) {echo $rows['dg_id'] . " " . $rows['dg_username'] . "<br>";}// 翻页链接for ($i = 0; $i < $pagenum; $i ++) {echo "<a href=index.php?page=" . ($i + 1) . ">" . ($i + 1) . "</a>";}?>
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