/** * 文件分页类 */class filepage { private $current; //当前页 private $file; //文件内容 private $totalpage; //总的页数 private $url; //传递的参数 private $pagelen; //每页显示的长度/** * [__construct description] 构造方法 数据初始化 * @author lianggc 2016-06-28 * @param string $file_path [description] 文件路径 * @param integer $len [description] 每页显示多少数据 */ function __construct( $file_path='',$len = 200 ){ if(!file_exists($file_path)){ die($file_path not exists); } $this->file = file_get_contents($file_path); $this->pagelen = $len; $this->current = isset($_get['page'])?$_get['page']:1; $this->totalpage = $this->gettotalpage(); $this->pageoverflow(); $this->url = $this->geturl(); }/** * [pageoverflow description] 页数溢出 * @author lianggc 2016-06-28 * @return [type] [description] */private function pageoverflow(){ if($this->current>$this->totalpage){ //当页大于最大页 $this->current=$this->totalpage; } if($this->currentcurrent=1; }} /** * [gettotalpage description] 计算最大页数 * @author lianggc 2016-06-28 * @return [type] [description] */ private function gettotalpage(){ return ceil(strlen($this->file)/$this->pagelen); } /** * [geturl description] url拼接 * @author lianggc 2016-06-28 * @return [type] [description] */ private function geturl(){ $url =parse_url($_server['request_uri']); parse_str(isset($url['query'])?$url['query']:'',$queryarr); unset($queryarr['page']); $query_str = http_build_query($queryarr); if(empty($query_str)){ return $url['path'].'?page='; }else{ return $url['path'].'?'.$query_str.'&page='; } } //首页 private function first(){ if($this->current>1) return url.1'>首页; } //上一页 private function pre(){ if( $this->current > 1 ) return url.($this->current-1).'>上一页; } //下一页 private function next(){ if( $this->current totalpage) return url.($this->current+1).'>下一页; } //最后一页 private function end(){ if( $this->current totalpage ) return url.$this->totalpage.'>末页; }/** * [pagelist description] 拼接 分页数 1 2 3 4 5 6 * @author lianggc 2016-06-28 * @return [type] [description] */ public function pagelist(){ $pageliststr = ''; for ($i=1;$itotalpage;$i++){ if($i==$this->current){ $pageliststr.=.$i. ; }else{ $pageliststr.=url.$i.'>.$i. ; } } return $pageliststr; }/** * [pagestyle description] 分页显示格式 * @author lianggc 2016-06-28 * @param integer $style [description] 分页格式 * @return [type] [description] */ public function pagestyle($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; } }/** * [getcontents description] 获取每页内容。 暂不支持中文 * @author lianggc 2016-06-28 * @return [type] [description] */ public function getcontents(){ $prepagelen = strlen($this->substrs($this->current-1)); $currentpagelen = strlen($this->substrs($this->current)); return substr($this->file, $prepagelen,$currentpagelen-$prepagelen); }/** * [substrs description] 文件内容截取 * @author lianggc 2016-06-28 * @param [type] $page [description] 页数 * @return [type] [description] */ public function substrs($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; }}
使用如下
$file_obj=new filepage('../test.txt',1);
echo $file_obj->getcontents();echo
;echo $file_obj->pagestyle();
以上就介绍了 php 文件分页类，包括了方面的内容，希望对php教程有兴趣的朋友有所帮助。