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PageFile.php
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<?php
class PageFile{
protected $file;
protected $pagesize;
protected $return;
protected $searchFile;
protected $usecache;
protected $cacheFile;
protected $cacheTime;
public function __construct($file,$pagesize=10,$return=false,$searchFile='search.txt',$usecahce=true,$cacheFile='cache.txt',$cacheTime=1800){
$this->file = $file;
$this->pagesize = $pagesize;
$this->return = $return;
$this->searchFile = $searchFile;
$this->usecache = $usecahce;
$this->cacheFile = $cacheFile;
$this->cacheTime = $cacheTime;
}
public function render($title='',$pagesize=10)
{
if(!file_exists($this->file)) throw new Exception('文件不存在!');
$handle = fopen($this->file, 'r');
$total = 0; //总行数
$arr[1] = 0; //第一行开始于0
$i = 2; //第2行开始记录
$search = $_GET['s']??'';
if($search){
$article = '';
while (!feof($handle)) {
$row = fgets($handle);
if(strpos($row,$search)!==false){
$article.=$row;
}
}
file_put_contents($this->searchFile,trim($article));
$handle = fopen($this->searchFile, 'r');
}
if(!$search && $this->usecache && file_exists($this->cacheFile) && time()-filemtime($this->cacheFile)<$this->cacheTime ) {
list($arr,$total) = unserialize(file_get_contents($this->cacheFile));
}else{
while (!feof($handle)) {
$row = fgets($handle);
if ($row) {
$arr[$i] = $arr[$i - 1] + strlen($row); //不需要+1 记录每行第一个字节的位置 = 前一行+当前行长度
$total++;
$i++;
}
}
if(!$search && $this->usecache) file_put_contents($this->cacheFile,serialize([$arr,$total]));
}
fseek($handle, 0);
$page = new Page($total, $pagesize);
$pagestr = $page->render();
$curpage = $page->getPage();
$totalPage = $page->getTotalPage();
$offset = ($curpage - 1) * $pagesize + 1; //文件行便宜
fseek($handle, $arr[$offset]);
$code = $this->getBaseHtml($title,$search);
$count = 1;
$reg='/^(.*?)\s+(.*)$/i';
while (!feof($handle)) {
if ($count == $pagesize + 1) break;
$row = fgets($handle);
if($search && strpos($row,$search)===false) continue;
$line = $offset+$count-1;
preg_match($reg, $row, $match);
//if(empty($match)) continue;//空行是否跳过
$url = $match[1]??''?:'0'; //保证空行不报错
$name = $match[2]??''?:' ';//保证空行不报错
if($search){
$name = str_replace($search,'<font color="red">'.$search.'</font>',$name);
}
$code .= <<<html
<li class="list-group-item">
<!-- <span class="badge pull-left" style="margin-right: 5px;">{$line}</span>--> <a class="badge" href="http://{$url}" target="_blank">{$url}</a><a href="javascript:;" target="_blank" class="text-warning">{$name}</a>
</li>
html;
$count++;
}
$code .= '</ul></div></div>';
fclose($handle);
if($total==0) {
$none = $code.'暂无数据</div></body></html>';
if($this->return) return $none;
echo $none;
return;
}
$html = $code.$pagestr.'当前页：' . $curpage . ',总页数：' . $totalPage . ',记录数：'.$total.'</div></body></html>';
if($this->return) return $html;
echo $html;
}
protected function getBaseHtml($title='',$search='')
{
$code = <<<code
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>$title</title>
<link href="https://cdn.bootcss.com/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container" style="margin-top: 20px;">
<div class="row">
<div class="col-lg-12 col-md-12 col-sm-12 col-xs-12">
<form class="form-inline" method="get">
<div class="form-group">
<div class="input-group">
<input type="text" class="form-control" name="s" placeholder="请输入名称" value="$search">
</div>
</div>
<button type="submit" class="btn btn-primary">搜索</button>
<a href="index.php" class="btn btn-default">重置</a>
<a href="add.php?file={$this->file}&title={$title}" class="btn btn-default pull-right">添加</a>
</form>
</div>
</div>
<div class="row" style="margin-top: 20px;">
<div class="col-lg-12 col-md-12 col-sm-12 col-xs-12">
<ul class="list-group">
code;
return $code;
}
}