入门级php分页类
- 原文地址：http://www.xfcodes.com/php/fenye/3608.htm
- 时间：2015-12-16 20:52:00来源：网络
php分页类。
复制代码代码如下:
<?php
/*
* 快速php分页类
*
**/
class Page{
private $totalpage;
private $stride;
private $currentpage;
//设置总页数
function setTotalpage($objpage=1){
$this->totalpage=$objpage;
}
//设置当前页
function setCurrentpage($objpage=1){
$this->currentpage=$objpage;
} //先锋教程网 www.xfcodes.com
//设置跨度
function setStride($objStride=1){
$this->stride=$objStride;
}
//获得总页数
function getTotalpage(){
return $this->totalpage;
}
//获得跨读
function getStride($objStride=1){
return $this->stride;
}
//获取当前页
function getCurrentpage($objpage=1){
return $this->currentpage;
}
//打印分页
public function Pageprint(){
for($Tmpa=1;$Tmpa<=$this->totalpage;$Tmpa++){
if($Tmpa+$this->stride<$this->currentpage){//加了跨度还小于当前页的不显示
continue;
}
if($Tmpa+$this->stride==$this->currentpage){//刚好够跨度的页数
$p=$this->currentpage-1;
$willprint.="<a href=\"$_SERVER[PHP_SELF]?page=1\"><span>首页</span></a> <a href=\"$_SERVER[PHP_SELF]?page=$p\"><span>上一页</span></a> ";
}
if($Tmpa>$this->currentpage+$this->stride){//大于当前页+跨度的页面
break;
}
$willprint.="[<span><a href=\"$_SERVER[PHP_SELF]?page=$Tmpa\">$Tmpa</a></span>]";
if($Tmpa==$this->currentpage+$this->stride){//刚好够跨度的页数
$p=$this->currentpage+$this->stride+1;
$willprint.="<a href=\"$_SERVER[PHP_SELF]?page=$p\"><span>下一页</span></a> <a href=\"$_SERVER[PHP_SELF]?page=$this->totalpage\"><span>末页</span></a>";
}
}
echo $willprint;
}
}
class cut_page extends Page
{
var $filename;
var $showtotal;
function __construct($filename){
$this->cachefile = $filename;
$this->showtotal = "yes";
}
public function filename(){
if (file_exists($this->cachefile)){
return 1;
}
else
return 0;
}
private $type;
public function typelist($typeid){
$this->type = $typeid;
$fp = fopen($this->cachefile,"rb");
$str= fread($fp,filesize($this->cachefile));
//echo $this->type."<br>"; //分类ID
$arr= explode("::",$str);
for ($i=0;$i<count($arr);$i++){
$arr2 = explode("=",$arr[$i]);
if($arr2[0]==$this->type){
//return $arr2[1];
if(isset($_GET[page])){
$page=$_GET[page];
}else{
$page=1;
}
Page::setTotalpage($arr2[1]);
Page::setCurrentpage($page);
Page::setStride(3);
Page::Pageprint();
if ($this->showtotal=="yes"){
echo "<span style=\"border:1px solid #ccc;margin-left:40px;padding:1px 1px;\">".$page."/".$arr2[1]."页</span>";
}
}
}
fclose($fp);
}
public function updatelist($typeid,$value){
$this->type = $typeid;
$this->typevalue=$value;
if (file_exists($this->cachefile)){ //若文件存在
$fp = fopen($this->cachefile,"rb+");
$str= fread($fp,filesize($this->cachefile));
if(ereg("::".$this->type."=[0-9]+",$str)){
//正则替换
$str2= ereg_replace("::".$this->type."=[0-9]+","::".$this->type."=".$this->typevalue,$str);
fseek($fp,0); //从文件头开始
fwrite($fp,$str2); //写入文件新数据
$seek = ftell($fp); //返回文件指针长度
ftruncate($fp,$seek); //截断文件
}
else{
$str2 = "::".$this->type."=".$this->typevalue;
fwrite($fp,$str2); //若分类ID不存在，则续写文件
}
}
else{ //若文件不存在
$fp = fopen($this->cachefile,"xb");
$str="::".$this->type."=".$this->typevalue;
fwrite($fp,$str);
}
fclose($fp);
}
}
/*使用方法，参数为缓存文件名，可自定义*/
$listpage = new cut_page("pages_cache.txt");
/*列出分页 参数为分类的ID*/
$listpage->typelist("2");
$listpage->showtotal="yes"; //是否显示总数yes /no 默认为yes
echo "<br>";
/*
修改分页文件或者创建分页文件，参数分别为分类ID，分页数量，此方法使用在创建文章后遍历数据库获得分类的ID及分页的总量
分页=总记录/每页显示数目 ^0^这个自己算。updatelist(type,num)
//$listpage->updatelist("6","900");
cut_page为主类。可进行分页的创建，修改，显示
*/
?>