本文实例为大家分享了PHP实现文件内容操作的分页类，强调一下只针对文件的操作，供大家参考，具体内容如下
<?php
class StrPage {
private $current; //当前页
private $file; //操作文件
private $totalPage; //总的页数
private $url; //传递的参数
private $pageLen; //每页显示的长度
function __construct( $file,$len = 200 ){
$this->file = file_get_contents($file);
$this->pageLen = $len;
$this->current = isset($_GET['page'])?$_GET['page']:1;
$this->totalPage = $this->getTotalPage();
$this->url = $this->getUrl();
}
//获取到这个文件总的长度
private function getTotalPage(){
return ceil(strlen($this->file)/$this->pageLen);
}
//获取当前传递的参数,保留参数，page参数动态变化
private function getUrl(){
$url =parse_url($_SERVER['REQUEST_URI']);
parse_str($url['query'],$queryArr);
unset($queryArr['page']);
$queryStr = http_build_query($queryArr);
return $url['path'].'?'.$queryStr.'&page=';
}
//首页
private function first(){
if($this->current>1)
return "<a href='".$this->url."1'>首页</a>";
}
//上一页
private function pre(){
if( $this->current > 1 )
return "<a href='".$this->url.($this->current-1)."'>上一页</a>";
}
//下一页
private function next(){
if( $this->current < $this->totalPage)
return "<a href='".$this->url.($this->current+1)."'>下一页</a>";
}
//最后一页
private function end(){
if( $this->current < $this->totalPage )
return "<a href='".$this->url.$this->totalPage."'>末页</a>";
}
public function pageList(){
$pageListStr = '';
for ($i=1;$i<=$this->totalPage;$i++){
if($i==$this->current){
$pageListStr.="<span style='font-size:20px;color:#f00'>".$i."</span> ";
}else{
$pageListStr.="<a href='".$this->url.$i."'>".$i." </a>";
}
}
return $pageListStr;
}
public function pageStyle($style=1){
switch ($style){
case 1:
return "共有".$this->totalPage."页".$this->first().$this->pre().$this->pageList().$this->next().$this->end();
break;
case 2;
return $this->pageList();
break;
}
}
public function getContents(){
$prePageLen = strlen($this->subStrs($this->current-1));
$currentPageLen = strlen($this->subStrs($this->current));
return substr($this->file, $prePageLen,$currentPageLen-$prePageLen);
}
public function subStrs($page){
$string = '';
$len= $page*$this->pageLen;
for( $i=0; $i<$len; $i++ ){
if( ord(substr($this->file,$i,1))>0xa0 ){
$string .= substr($this->file,$i,3);
$i = $i+2;
}else{
$string .= substr($this->file, $i,1);
}
}
return $string;
}
}
以上就是本文的全部内容，希望对大家学习PHP程序设计有所帮助。