PHP分頁器制作,自動生成分面頁碼,JS調用函數,分頁的原理大致如下,分頁程序有兩個非常重要的參數:每頁顯示幾條記錄($pagesize)和當前是第幾頁($page).
有了這兩個參數就可以很方便的寫出分頁程序,我們以MySql數據庫作為數據源,在mysql里如果要想取出表內某段特定內容可以使用的 T-SQL語句:select * from table limit offset,rows來實現。這里的offset是記錄偏移量,它的計算方法是offset=$pagesize*($page-1),rows是要顯示的記錄條數,這里就是$page,也就是說select * from table limit 10,10這條語句的意思是取出表里從第11條記錄開始的20條記錄.
PHP實例代碼如下:
- <?php
- class PageView{
- /**頁碼**/
- public $pageNo = 1;
- /**頁大小**/
- public $pageSize = 20;
- /**共多少頁**/
- public $pageCount = 0;
- /**總記錄數**/
- public $totalNum = 0;
- /**偏移量,當前頁起始行**/
- public $offSet = 0;
- /**每頁數據**/
- public $pageData = array();
- /**是否有上一頁**/
- public $hasPrePage = true;
- /**是否有下一頁**/
- public $hasNextPage = true;
- public $pageNoList = array();
- public $jsFunction ='jsFunction';
- /**
- *
- * @param unknown_type $count 總行數
- * @param unknown_type $size 分頁大小
- * @param unknown_type $string
- */
- public function __construct($count=0, $size=20,$pageNo=1,$pageData =array(),$jsFunction='jsFunction'){
- $this->totalNum = $count;//總記錄數
- $this->pageSize = $size;//每頁大小
- $this->pageNo = $pageNo;
- //計算總頁數
- $this->pageCount = ceil($this->totalNum/$this->pageSize);
- $this->pageCount = ($this->pageCount<=0)?1:$this->pageCount;
- //檢查pageNo
- $this->pageNo = $this->pageNo == 0 ? 1 : $this->pageNo;
- $this->pageNo = $this->pageNo > $this->pageCount? $this->pageCount : $this->pageNo;
- //計算偏移
- $this->offset = ( $this->pageNo - 1 ) * $this->pageSize;
- //計算是否有上一頁下一頁
- $this->hasPrePage = $this->pageNo == 1 ?false:true;
- $this->hasNextPage = $this->pageNo >= $this->pageCount ?false:true;
- $this->pageData = $pageData;
- $this->jsFunction = $jsFunction;
- }
- /**
- * 分頁算法
- * @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;
- }
- /***
- * 創建分頁控件
- * @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 . "(" . ($this->pageNo-1) . ")">上一頁</a>";
- }
- foreach ($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) . ")">下一頁</a>";
- }
- }
- }
- $pageString = $pageString .("</div></div>");
- return $pageString;
- }
- }
- ?>
css,代碼如下:
- <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>
使用方法,代碼如下:
- $pageNo = $_GET['pageNo'];
- if(emptyempty($pageNo)){
- $pageNo = 1;
- }
- //分頁數據
- $pageData = News::getNewsPage($pageNo,$pageSize);
- //取得總行數
- $count = News::getNewsCount();
- //創建分頁器
- $p = new PageView($count['0']['TOTAL'],$pageSize,$pageNo,$pageData);
- //生成頁碼
- $pageViewString = $p->echoPageAsDiv();
下面再介紹一個分頁類,代碼如下:
- <?php
- class SubPages{
- private $each_disNums;//每頁顯示的條目數
- private $nums;//總條目數
- private $current_page;//當前被選中的頁
- private $sub_pages;//每次顯示的頁數
- private $pageNums;//總頁數
- private $page_array = array();//用來構造分頁的數組
- private $subPage_link;//每個分頁的鏈接
- private $subPage_type;//顯示分頁的類型
- /*
- __construct是SubPages的構造函數,用來在創建類的時候自動運行.
- @$each_disNums 每頁顯示的條目數
- @nums 總條目數
- @current_num 當前被選中的頁
- @sub_pages 每次顯示的頁數
- @subPage_link 每個分頁的鏈接
- @subPage_type 顯示分頁的類型
- 當@subPage_type=1的時候為普通分頁模式
- example: 共4523條記錄,每頁顯示10條,當前第1/453頁 [首頁] [上頁] [下頁] [尾頁]
- 當@subPage_type=2的時候為經典分頁樣式
- example: 當前第1/453頁 [首頁] [上頁] 1 2 3 4 5 6 7 8 9 10 [下頁] [尾頁]
- */
- function __construct($each_disNums,$nums,$current_page,$sub_pages,$subPage_link,$subPage_type){
- $this->each_disNums=intval($each_disNums);
- $this->nums=intval($nums);
- if(!$current_page){
- $this->current_page=1;
- }else{
- $this->current_page=intval($current_page);
- }
- $this->sub_pages=intval($sub_pages);
- $this->pageNums=ceil($nums/$each_disNums);
- $this->subPage_link=$subPage_link;
- $this->show_SubPages($subPage_type);
- //echo $this->pageNums."--".$this->sub_pages;
- }
- /*
- __destruct析構函數,當類不在使用的時候調用,該函數用來釋放資源。
- */
- function __destruct(){
- unset($each_disNums);
- unset($nums);
- unset($current_page);
- unset($sub_pages);
- unset($pageNums);
- unset($page_array);
- unset($subPage_link);
- unset($subPage_type);
- }
- /*
- show_SubPages函數用在構造函數里面。而且用來判斷顯示什么樣子的分頁
- */
- function show_SubPages($subPage_type){
- if($subPage_type == 1){
- $this->subPageCss1();
- }elseif ($subPage_type == 2){
- $this->subPageCss2();
- }
- }
- /*
- 用來給建立分頁的數組初始化的函數。
- */
- function initArray(){
- for($i=0;$i<$this->sub_pages;$i++){
- $this->page_array[$i]=$i;
- }
- return $this->page_array;
- }
- /*
- construct_num_Page該函數使用來構造顯示的條目
- 即使:[1][2][3][4][5][6][7][8][9][10]
- */
- function construct_num_Page(){
- if($this->pageNums < $this->sub_pages){
- $current_array=array();
- for($i=0;$i<$this->pageNums;$i++){
- $current_array[$i]=$i+1;
- }
- }else{
- $current_array=$this->initArray();
- if($this->current_page <= 3){
- for($i=0;$i<count($current_array);$i++){
- $current_array[$i]=$i+1;
- }
- }elseif ($this->current_page <= $this->pageNums && $this->current_page > $this->pageNums - $this->sub_pages + 1 ){
- for($i=0;$i<count($current_array);$i++){
- $current_array[$i]=($this->pageNums)-($this->sub_pages)+1+$i;
- }
- }else{
- for($i=0;$i<count($current_array);$i++){
- $current_array[$i]=$this->current_page-2+$i;
- }
- }
- }
- return $current_array;
- }
- /*
- 構造普通模式的分頁
- 共4523條記錄,每頁顯示10條,當前第1/453頁 [首頁] [上頁] [下頁] [尾頁]
- */
- function subPageCss1(){
- $subPageCss1Str="";
- $subPageCss1Str.="共".$this->nums."條記錄,";
- $subPageCss1Str.="每頁顯示".$this->each_disNums."條,";
- $subPageCss1Str.="當前第".$this->current_page."/".$this->pageNums."頁 ";
- if($this->current_page > 1){
- $firstPageUrl=$this->subPage_link."1";
- $prewPageUrl=$this->subPage_link.($this->current_page-1);
- $subPageCss1Str.="[<a href='$firstPageUrl'>首頁</a>] ";
- $subPageCss1Str.="[<a href='$prewPageUrl'>上一頁</a>] ";
- }else {
- $subPageCss1Str.="[首頁] ";
- $subPageCss1Str.="[上一頁] ";
- }
- if($this->current_page < $this->pageNums){
- $lastPageUrl=$this->subPage_link.$this->pageNums;
- $nextPageUrl=$this->subPage_link.($this->current_page+1);
- $subPageCss1Str.=" [<a href='$nextPageUrl'>下一頁</a>] ";
- $subPageCss1Str.="[<a href='$lastPageUrl'>尾頁</a>] ";
- }else {
- $subPageCss1Str.="[下一頁] ";
- $subPageCss1Str.="[尾頁] ";
- }
- echo $subPageCss1Str;
- }
- /*
- 構造經典模式的分頁
- 當前第1/453頁 [首頁] [上頁] 1 2 3 4 5 6 7 8 9 10 [下頁] [尾頁]
- */
- function subPageCss2(){
- $subPageCss2Str="";
- $subPageCss2Str.="當前第".$this->current_page."/".$this->pageNums."頁 ";
- if($this->current_page > 1){
- $firstPageUrl=$this->subPage_link."1";
- $prewPageUrl=$this->subPage_link.($this->current_page-1);
- $subPageCss2Str.="[<a href='$firstPageUrl'>首頁</a>] ";
- $subPageCss2Str.="[<a href='$prewPageUrl'>上一頁</a>] ";
- }else {
- $subPageCss2Str.="[首頁] ";
- $subPageCss2Str.="[上一頁] ";
- }
- $a=$this->construct_num_Page();
- for($i=0;$i<count($a);$i++){
- $s=$a[$i];
- if($s == $this->current_page ){
- $subPageCss2Str.="[<span style='color:red;font-weight:bold;'>".$s."</span>]";
- }else{
- $url=$this->subPage_link.$s;
- $subPageCss2Str.="[<a href='$url'>".$s."</a>]";
- }
- }
- if($this->current_page < $this->pageNums){
- $lastPageUrl=$this->subPage_link.$this->pageNums;
- $nextPageUrl=$this->subPage_link.($this->current_page+1);
- $subPageCss2Str.=" [<a href='$nextPageUrl'>下一頁</a>] ";
- $subPageCss2Str.="[<a href='$lastPageUrl'>尾頁</a>] ";
- }else {
- $subPageCss2Str.="[下一頁] ";
- $subPageCss2Str.="[尾頁] ";
- }
- echo $subPageCss2Str;
- }
- }
- ?>
調用方法,代碼如下:
- <?php
- require_once("SubPages.php");
- //每頁顯示的條數
- $page_size=20;
- //總條目數
- $nums=1024;
- //每次顯示的頁數
- $sub_pages=10;
- //得到當前是第幾頁
- $pageCurrent=$_GET["p"];
- //if(!$pageCurrent) $pageCurrent=1;
- $subPages=new SubPages($page_size,$nums,$pageCurrent,$sub_pages,"test.php?p=",2);
- ?>
新聞熱點
疑難解答