PHP实现适用于文件内容操作的分页类

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            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
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 "首页";
}
//上一页
private function pre(){
if( $this->current > 1 )
  return "上一页";
}
//下一页
private function next(){
if( $this->current totalPage)
  return "下一页";
}
//最后一页
private function end(){
if( $this->current totalPage )
  return "末页";
}

public function pageList(){
$pageListStr = '';
for ($i=1;$itotalPage;$i++){
  if($i==$this->current){
  $pageListStr.="".$i." ";
  }else{
  $pageListStr.="".$i." ";
  }
}
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; $ifile,$i,1))>0xa0 ){
   $string .= substr($this->file,$i,3);
   $i = $i+2;
  }else{
   $string .= substr($this->file, $i,1);
  }
  }
  return $string;
  
}

}