/** - ** 通用php分页类。(仿Google样式)
- ** 只需提供记录总数与每页显示数两个参数。(已附详细使用说明..)
- ** 无需指定URL，链接由程序生成。方便用于检索结果分页。
- ** 表单采用GET方法提交，可保证在诸如查询，删除之类的操作时，不丢失URL参数。
- **/
- class Pager{
- //IE地址栏地址
- var $url;
- //记录总条数
- var $countall;
- //总页数
- var $page;
- //分页数字链接
- var $thestr;
- //首页、上一页链接
- var $backstr;
- //尾页、下一页链接
- var $nextstr;
- //当前页码
- var $pg;
- //每页显示记录数量
- var $countlist;
- //翻页样式
- var $style;
- //构造函数，实例化该类的时候自动执行该函数
- function Pager($countall,$countlist,$style="page"){
- //记录数与每页显示数不能整队时，页数取余后加1
- $this->countall = $countall;
- $this->countlist = $countlist;
- $this->style=$style;
- if ($this->countall%$this->countlist!=0){
- $this->page=sprintf("%d",$this->countall/$this->countlist)+1;
- }else{
- $this->page=$this->countall/$this->countlist;
- }
$this->pg=$_GET["pg"]; - //保证pg在未指定的情况下为从第1页开始
- if (!ereg("^[1-9][0-9]*$",$this->pg) || empty($this->pg)){
- $this->pg=1;
- }
- //页码超出最大范围，取最大值
- if ($this->pg>$this->page){
- $this->pg=$this->page;
- }
- //得到当前的URL。具体实现请看最底部的函数实体
- $this->url = Pager::getUrl();
- //替换错误格式的页码为正确页码
- if(isset($_GET["pg"]) && $_GET["pg"]!=$this->pg){
- $this->url=str_replace("?pg=".$_GET["pg"],"?pg=$this->pg",$this->url);
- $this->url=str_replace("&pg=".$_GET["pg"],"&pg=$this->pg",$this->url);
- }
- //生成12345等数字形式的分页。
- if ($this->page<=10){
- for ($i=1;$i<$this->page+1;$i++){
- $this->thestr=$this->thestr.Pager::makepg($i,$this->pg);
- }
- }else{
- if ($this->pg<=5){
- for ($i=1;$i<10;$i++){
- $this->thestr=$this->thestr.Pager::makepg($i,$this->pg);
- }
- }else{
- if (6+$this->pg<=$this->page){
- for ($i=$this->pg-4;$i<$this->pg+6;$i++){
- $this->thestr=$this->thestr.Pager::makepg($i,$this->pg);
- }
- }else{
- for ($i=$this->pg-4;$i<$this->page+1;$i++){
- $this->thestr=$this->thestr.Pager::makepg($i,$this->pg);
- }
} - }
- }
- //生成上页下页等文字链接
- $this->backstr = Pager::gotoback($this->pg);
- $this->nextstr = Pager::gotonext($this->pg,$this->page);
- //echo (" 共".$this->countall." 条,每页".$this->countlist."条，共".$this->page."页".$this->backstr.$this->thestr.$this->nextstr);
- }
- //生成数字分页的辅助函数
- function makepg($i,$pg){
- if ($i==$pg){
- return " ".$i."";
- }else{
- return " url,5,$i)." class='".$this->style."'>".$i."";
- }
- }
- //生成上一页等信息的函数
- function gotoback($pg){
- if ($pg-1>0){
- return $this->gotoback=" url,3,0)." class='".$this->style."'>首页 url,2,0)." class='".$this->style."'>上一页";
- }else{
- return $this->gotoback="首页 上一页 ";
- }
- }
- //生成下一页等信息的函数
- function gotonext($pg,$page){
- if ($pg < $page){
- return " url,1,0)." class='".$this->style."'>下一页 url,4,0)." class='".$this->style."'>尾页";
- }else{
- return " 下一页 尾页";
- }
- } bbs.it-home.org
- //处理url中$pg的方法,用于自动生成pg=x
- function replacepg($url,$flag,$i){
- if ($flag == 1){
- $temp_pg = $this->pg;
- return str_replace("pg=".$temp_pg,"pg=".($this->pg+1),$url);
- }else if($flag == 2) {
- $temp_pg = $this->pg;
- return str_replace("pg=".$temp_pg,"pg=".($this->pg-1),$url);
- }else if($flag == 3) {
- $temp_pg = $this->pg;
- return str_replace("pg=".$temp_pg,"pg=1",$url);
- }else if($flag == 4){
- $temp_pg = $this->pg;
- return str_replace("pg=".$temp_pg,"pg=".$this->page,$url);
- }else if($flag == 5){
- $temp_pg = $this->pg;
- return str_replace("pg=".$temp_pg,"pg=".$i,$url);
- }else{
- return $url;
- }
- }
- //获得当前URL的方法
- function getUrl(){
- $url="http://".$_SERVER["HTTP_HOST"];
- if(isset($_SERVER["REQUEST_URI"])){
- $url.=$_SERVER["REQUEST_URI"];
- }else{
- $url.=$_SERVER["PHP_SELF"];
- if(!empty($_SERVER["QUERY_STRING"])){
- $url.="?".$_SERVER["QUERY_STRING"];
- }
- }
- //在当前的URL里加入pg=x字样
- if (!ereg("(pg=|PG=|pG=|Pg=)", $url)){
- if (!strpos($url,"?")){
- $url = $url."?pg=1";
- }else{
- $url = $url."&pg=1";
- }
- }
- return $url;
- }
- }
- ?>
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