php 文件分页类
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2022-06-14 13:25:36
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/** * 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。