PHP中常用的分页类总结
发布:smiling 来源: PHP粉丝网 添加日期:2014-08-28 11:27:14 浏览: 评论:0
php分页是目前在显示大量结果时所采用的最好的方式,有了下面这些代码的帮助,开发人员可以在多个页面中显示大量的数据,在互联网上,分页是一般用于搜索结果或是浏览全部信息.
php基本分页,代码如下:
- <?php
- // database connection info
- $conn = mysql_connect('localhost','dbusername','dbpass') or trigger_error("SQL", E_USER_ERROR);
- $db = mysql_select_db('dbname',$conn) or trigger_error("SQL", E_USER_ERROR);
- // find out how many rows are in the table
- $sql = "SELECT COUNT(*) FROM numbers";
- $result = mysql_query($sql, $conn) or trigger_error("SQL", E_USER_ERROR);
- $r = mysql_fetch_row($result);
- $numrows = $r[0];
- // number of rows to show per page
- $rowsperpage = 10;
- // find out total pages
- $totalpages = ceil($numrows / $rowsperpage);
- // get the current page or set a default
- if (isset($_GET['currentpage']) && is_numeric($_GET['currentpage'])) {
- // cast var as int
- $currentpage = (int) $_GET['currentpage'];
- } else {
- // default page num
- $currentpage = 1;
- } // end if
- // if current page is greater than total pages...
- if ($currentpage > $totalpages) {
- // set current page to last page
- $currentpage = $totalpages;
- } // end if
- // if current page is less than first page...
- if ($currentpage < 1) {
- // set current page to first page
- $currentpage = 1;
- } // end if
- // the offset of the list, based on current page
- $offset = ($currentpage - 1) * $rowsperpage;
- // get the info from the db
- $sql = "SELECT id, number FROM numbers LIMIT $offset, $rowsperpage";
- $result = mysql_query($sql, $conn) or trigger_error("SQL", E_USER_ERROR);
- // while there are rows to be fetched...
- while ($list = mysql_fetch_assoc($result)) {
- // echo data
- echo $list['id'] . " : " . $list['number'] . "<br />";
- } // end while
- /****** build the pagination links ******/
- // range of num links to show
- $range = 3;
- // if not on page 1, don't show back links
- if ($currentpage > 1) {
- // show << link to go back to page 1
- echo " <a href='{$_SERVER['PHP_SELF']}?currentpage=1'><<</a> ";
- // get previous page num
- $prevpage = $currentpage - 1;
- // show < link to go back to 1 page
- echo " <a href='{$_SERVER['PHP_SELF']}?currentpage=$prevpage'><</a> ";
- } // end if
- // loop to show links to range of pages around current page
- for ($x = ($currentpage - $range); $x < (($currentpage + $range) + 1); $x++) {
- // if it's a valid page number...
- if (($x > 0) && ($x <= $totalpages)) {
- // if we're on current page...
- if ($x == $currentpage) {
- // 'highlight' it but don't make a link
- echo " [<b>$x</b>] ";
- // if not current page...
- } else {
- // make it a link
- echo " <a href='{$_SERVER['PHP_SELF']}?currentpage=$x'>$x</a> ";
- } // end else
- } // end if
- } // end for
- // if not on last page, show forward and last page links
- if ($currentpage != $totalpages) {
- // get next page
- $nextpage = $currentpage + 1;
- // echo forward link for next page
- echo " <a href='{$_SERVER['PHP_SELF']}?currentpage=$nextpage'>></a> ";
- // echo forward link for lastpage
- echo " <a href='{$_SERVER['PHP_SELF']}?currentpage=$totalpages'>>></a> ";
- } // end if
- /****** end build pagination links ******/
- ?>
先看一个常用的php分页类,代码如下:
- <?php
- /*
- Place code to connect to your DB here.
- */
- include('config.php'); // include your code to connect to DB.
- $tbl_name=""; //your table name
- // How many adjacent pages should be shown on each side?
- $adjacents = 3;
- /*
- First get total number of rows in data table.
- If you have a WHERE clause in your query, make sure you mirror it here.
- */
- $query = "SELECT COUNT(*) as num FROM $tbl_name";
- $total_pages = mysql_fetch_array(mysql_query($query));
- $total_pages = $total_pages[num];
- /* Setup vars for query. */
- $targetpage = "filename.php"; //your file name (the name of this file)
- $limit = 2; //how many items to show per page
- $page = $_GET['page'];
- if($page)
- $start = ($page - 1) * $limit; //first item to display on this page
- else
- $start = 0; //if no page var is given, set start to 0
- /* Get data. */
- $sql = "SELECT column_name FROM $tbl_name LIMIT $start, $limit";
- $result = mysql_query($sql);
- /* Setup page vars for display. */
- if ($page == 0) $page = 1; //if no page var is given, default to 1.
- $prev = $page - 1; //previous page is page - 1
- $next = $page + 1; //next page is page + 1
- $lastpage = ceil($total_pages/$limit); //lastpage is = total pages / items per page, rounded up.
- $lpm1 = $lastpage - 1; //last page minus 1
- /*
- Now we apply our rules and draw the pagination object.
- We're actually saving the code to a variable in case we want to draw it more than once.
- */
- $pagination = "";
- if($lastpage > 1)
- {
- $pagination .= "<div class="pagination">";
- //previous button
- if ($page > 1)
- $pagination.= "<a href="$targetpage?page=$prev">� previous</a>";
- else
- $pagination.= "<span class="disabled">� previous</span>";
- //pages
- if ($lastpage < 7 + ($adjacents * 2)) //not enough pages to bother breaking it up
- {
- for ($counter = 1; $counter <= $lastpage; $counter++)
- {
- if ($counter == $page)
- $pagination.= "<span class="current">$counter</span>";
- else
- $pagination.= "<a href="$targetpage?page=$counter">$counter</a>";
- }
- }
- elseif($lastpage > 5 + ($adjacents * 2)) //enough pages to hide some
- {
- //close to beginning; only hide later pages
- if($page < 1 + ($adjacents * 2))
- {
- for ($counter = 1; $counter < 4 + ($adjacents * 2); $counter++)
- {
- if ($counter == $page)
- $pagination.= "<span class="current">$counter</span>";
- else
- $pagination.= "<a href="$targetpage?page=$counter">$counter</a>";
- }
- $pagination.= "...";
- $pagination.= "<a href="$targetpage?page=$lpm1">$lpm1</a>";
- $pagination.= "<a href="$targetpage?page=$lastpage">$lastpage</a>";
- }
- //in middle; hide some front and some back
- elseif($lastpage - ($adjacents * 2) > $page && $page > ($adjacents * 2))
- {
- $pagination.= "<a href="$targetpage?page=1">1</a>";
- $pagination.= "<a href="$targetpage?page=2">2</a>";
- $pagination.= "...";
- for ($counter = $page - $adjacents; $counter <= $page + $adjacents; $counter++)
- {
- if ($counter == $page)
- $pagination.= "<span class="current">$counter</span>";
- else
- $pagination.= "<a href="$targetpage?page=$counter">$counter</a>";
- }
- $pagination.= "...";
- $pagination.= "<a href="$targetpage?page=$lpm1">$lpm1</a>";
- $pagination.= "<a href="$targetpage?page=$lastpage">$lastpage</a>";
- }
- //close to end; only hide early pages
- else
- {
- $pagination.= "<a href="$targetpage?page=1">1</a>";
- $pagination.= "<a href="$targetpage?page=2">2</a>";
- $pagination.= "...";
- for ($counter = $lastpage - (2 + ($adjacents * 2)); $counter <= $lastpage; $counter++)
- {
- if ($counter == $page)
- $pagination.= "<span class="current">$counter</span>";
- else
- $pagination.= "<a href="$targetpage?page=$counter">$counter</a>";
- }
- }
- }
- //next button
- if ($page < $counter - 1)
- $pagination.= "<a href="$targetpage?page=$next">next �</a>";
- else
- $pagination.= "<span class="disabled">next �</span>";
- $pagination.= "</div>n";
- }//开源代码phpfensi.com
- ?>
- <?php
- while($row = mysql_fetch_array($result))
- {
- // Your while loop here
- }
- ?>
- <?=$pagination?>
实例代码如下:
- <?php
- class PageView{
- /**页码**/
- public $pageNo = 1;
- /**页大小**/
- public $pageSize = 20;
- /**共多少页**/
- public $pageCount = 0;
- /**总记录数**/
- public $totalNum = 0;
- /**偏移量,当前页起始行**/
- public $offSet = 0;
- /**每页数据**/
- public $pageData = array();
- /**是否有上一页**/
- public $hasPrePage = true;
- /**是否有下一页**/
- public $hasNextPage = true;
- public $pageNoList = array();
- public $jsFunction ='jsFunction';
- /**
- *
- * @param unknown_type $count 总行数
- * @param unknown_type $size 分页大小
- * @param unknown_type $string
- */
- public function __construct($count=0, $size=20,$pageNo=1,$pageData =array(),$jsFunction='jsFunction'){
- $this->totalNum = $count;//总记录数
- $this->pageSize = $size;//每页大小
- $this->pageNo = $pageNo;
- //计算总页数
- $this->pageCount = ceil($this->totalNum/$this->pageSize);
- $this->pageCount = ($this->pageCount<=0)?1:$this->pageCount;
- //检查pageNo
- $this->pageNo = $this->pageNo == 0 ? 1 : $this->pageNo;
- $this->pageNo = $this->pageNo > $this->pageCount? $this->pageCount : $this->pageNo;
- //计算偏移
- $this->offset = ( $this->pageNo - 1 ) * $this->pageSize;
- //计算是否有上一页下一页
- $this->hasPrePage = $this->pageNo == 1 ?false:true;
- $this->hasNextPage = $this->pageNo >= $this->pageCount ?false:true;
- $this->pageData = $pageData;
- $this->jsFunction = $jsFunction;
- }
- /**
- * 分页算法
- * @return
- */
- private function generatePageList(){
- $pageList = array();
- if($this->pageCount <= 9){
- for($i=0;$i<$this->pageCount;$i++){
- array_push($pageList,$i+1);
- }
- }else{
- if($this->pageNo <= 4){
- for($i=0;$i<5;$i++){
- array_push($pageList,$i+1);
- }
- array_push($pageList,-1);
- array_push($pageList,$this->pageCount);
- }else if($this->pageNo > $this->pageCount - 4){
- array_push($pageList,1);
- array_push($pageList,-1);
- for($i=5;$i>0;$i--){
- array_push($pageList,$this->pageCount - $i+1);
- }
- }else if($this->pageNo > 4 && $this->pageNo <= $this->pageCount - 4){
- array_push($pageList,1);
- array_push($pageList,-1);
- array_push($pageList,$this->pageNo -2);
- array_push($pageList,$this->pageNo -1);
- array_push($pageList,$this->pageNo);
- array_push($pageList,$this->pageNo + 1);
- array_push($pageList,$this->pageNo + 2);
- array_push($pageList,-1);
- array_push($pageList,$this->pageCount);
- }
- }
- return $pageList;
- }
- /***
- * 创建分页控件
- * @param
- * @return String
- */
- public function echoPageAsDiv(){
- $pageList = $this->generatePageList();
- $pageString ="<div class='pagination'><div class='page-bottom'>";
- if(!emptyempty($pageList)){
- if($this->pageCount >1){
- if($this->hasPrePage){
- $pageString = $pageString ."<a class='page-next' href="javascript:" .$this->jsFunction . "(" . ($this->pageNo-1) . ")">上一页</a>";
- }
- foreach ($pageList as $k=>$p){
- if($this->pageNo == $p){
- $pageString = $pageString ."<span class='page-cur'>" . $this->pageNo . "</span>";
- continue;
- }
- if($p == -1){
- $pageString = $pageString ."<span class='page-break'>...</span>";
- continue;
- }
- $pageString = $pageString ."<a href="javascript:" .$this->jsFunction . "(" . $p . ")">" . $p . "</a>";
- }
- if($this->hasNextPage){
- $pageString = $pageString ."<a class='page-next' href="javascript:" .$this->jsFunction . "(" . ($this->pageNo+1) . ")">下一页</a>";
- }
- }
- }
- $pageString = $pageString .("</div></div>");
- return $pageString;
- }
- }
- ?>
css代码如下:
- <style type="text/css">
- <!--
- .pagination {font-family: Tahoma;overflow: hidden; padding-top: 12px; text-align: center;}
- .pagination-tab { margin-bottom: 20px;}
- .pagination a, .pagination .page-cur, .pagination .page-prev_g, .pagination .page-prev, .pagination .page-next, .pagination .page-next_g, .pagination .page-break, .pagination .page-skip {
- display: inline-block;font-family: Tahoma,SimSun,Arial; height: 22px;line-height:22px; margin: 0; min-width: 16px;padding: 0 5px; text-align: center; vertical-align: top; white-space: nowrap;}
- .pagination a, .pagination .page-prev_g, .pagination .page-prev, .pagination .page-next, .pagination .page-next_g, .pagination .page-cur, .pagination .page-break {
- border: 1px solid #ed3d83; color:#e9357d; font-weight:bold;}
- .pagination a:hover { border: 1px solid #ed3d83;text-decoration: none; background-color:#f95f9d; color:#fff;}
- .pagination .page-prev_g, .pagination .page-prev, .pagination .page-next, .pagination .page-next_g { width: 36px; background-image: url(../static/img/page.gif);}
- .pagination .page-prev { background-position: -0px -38px; padding-left: 16px;}
- .pagination .page-prev_g { background-position:0px -59px; padding-left: 16px; color:#cbcbcb; font-weight:normal;}
- .pagination .page-next { background-position: 0px 0px; padding-right: 16px; font-weight:normal;}
- .pagination .page-next_g { background-position: -0px -19px; padding-right: 16px; color:#cbcbcb;}
- .pagination .page-cur {background-color: #f95f9d; border: 1px solid #ed3d83;color: #fff;font-weight: bold;}
- .pagination .page-break {border: medium none; background:none transparent; color:#333;}
- -->
- </style>
在php页面中的调用方法,代码如下:
- $pageNo = $_GET['pageNo'];
- if(emptyempty($pageNo)){
- $pageNo = 1;
- }
- //分页数据
- $pageData = News::getNewsPage($pageNo,$pageSize);
- //取得总行数
- $count = News::getNewsCount();
- //创建分页器
- $p = new PageView($count['0']['TOTAL'],$pageSize,$pageNo,$pageData);
- //生成页码
- $pageViewString = $p->echoPageAsDiv();
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