本文實例為大家分享了PHP實現(xiàn)文件內(nèi)容操作的分頁類，強調(diào)一下只針對文件的操作，供大家參考，具體內(nèi)容如下

<?php 

class StrPage {

 private $current;  //當前頁 

 private $file;  //操作文件

 private $totalPage;  //總的頁數(shù)

 private $url;  //傳遞的參數(shù)

 private $pageLen;  //每頁顯示的長度

 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();

 }

 //獲取到這個文件總的長度

 private function getTotalPage(){

 return ceil(strlen($this->file)/$this->pageLen);

 }

 //獲取當前傳遞的參數(shù),保留參數(shù)，page參數(shù)動態(tài)變化

 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='; 

 }

 //首頁

 private function first(){

 if($this->current>1)

  return "<a href='".$this->url."1'>首頁</a>";

 }

 //上一頁

 private function pre(){

 if( $this->current > 1 )

  return "<a href='".$this->url.($this->current-1)."'>上一頁</a>";

 }

 //下一頁

 private function next(){

 if( $this->current < $this->totalPage)

  return "<a href='".$this->url.($this->current+1)."'>下一頁</a>";

 }

 //最后一頁

 private function end(){

 if( $this->current < $this->totalPage )

  return "<a href='".$this->url.$this->totalPage."'>末頁</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".$this->totalPage."頁".$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內(nèi)容，希望對大家學習PHP程序設(shè)計有所幫助。