php学习笔记（三十九）smarty缓存特性的使用（包括局部缓存）

<?php

define("ROOT", ".");

//解决问题：Warning: strftime() [function.strftime]:
date_default_timezone_set("Asia/Shanghai");
include ROOT."/libs/Smarty.class.php";

$tpl = new Smarty();

//smarty初始化
$tpl->template_dir=ROOT."/templates/";
$tpl->compile_dir=ROOT."/templates_c/";

//配置文件位置
$tpl->config_dir=ROOT."/configs/";

$tpl->caching=0;//缓存文件位置；开发阶段不要开启，运行阶段再开启
$tpl->cache_dir = ROOT."/cache/"; //设置缓存目录
$tpl->cache_lifetime=60;
$tpl->left_delimiter="<!--{";
$tpl->right_delimiter="}-->";
?>

<?php
/**
*
* 以下所有使用变量都要基于设定的前缀和后缀<!--{}-->
* smarty的缓存类似于网页静态化(使用smarty缓存非常方便)
* 1.需要开启缓存
* 2.指定一下缓存的时间
* 3.指定缓存文件的保存位置
* 4.清除缓存
* 		$tpl->clear_cache["模板","cacheID"]
* 		$tpl->clear_all_cache();
*
*
* 注意：
* 	1.一个模板只能有一个缓存文件
* 	2.如果一个模板的多个文章，则需要每个文章进行缓存
* 		$tpl->display("mysmarty.html",cacheid);
* 		cacheid最好使用：$_SERVER["REQUEST_URI"]地址栏来进行存储
* 	3.一定要使用smarty函数isCached来判断是否存在缓存
* 	4.将用户你好，和发表评论时不进行缓存的设置（局部不缓存）
* 		将数据写在非缓存之外
* 	方法一：php注册方式
* 		$tpl->registerPlugin("block", "nocache", "ncache",FALSE);
* 		注册块函数
* 		function ncache($param,$content){
* 			return $content;
* 		}
* 	方法二：写块文件
* 	//注册块需要修改Smarty的编译文件
* 	//	1.添加块文件
* 	//	2.修改smartyCompile文件(700行左右)
* 	//	if($tag_command=="nocache")
* 	//		$this->_plugins['block'][$tag_command] = array($plugin_func,null,null,null,false);
* 	//	else
* 	//		$this->_plugins['block'][$tag_command] = array($plugin_func,null,null,null,true);
*/
//如果文件加载失败require会停止继续解析php；而include则会继续向下执行
require 'init.smarty.php';
require 'page.class.php';

//判断是否存在缓存文件
if(!$tpl->isCached("mysmarty.html",$_SERVER["REQUEST_URI"])){
$title="这是一个文字标题";
$mysqli = new mysqli("localhost","root","root","hibernate");
$result = $mysqli->query("select id,name,price from users");
$page = new Page($result->num_rows,5);
$result = $mysqli->query("select id,name,price from users {$page->limit}");

$data=array();
while ($row=$result->fetch_assoc()){
$data[]=$row;
}
$tpl->assign("title",$title);
$tpl->assign("secT",$data);
$tpl->assign("fpage",$page->fpage());

echo date("Y-m-d H:i:s");
}
//设置为局部缓存
$tpl->assign("date",date("Y-m-d H:i:s"));

$tpl->registerPlugin("block", "nocache", "ncache",FALSE);
/**
* 注册块函数
* @param unknown_type $param
* @param unknown_type $content
*/
function ncache($param,$content){
return $content;
}

//模板文件名可以随便定义：比如：mysmarty.tpl只有内容是html就可以了
//第二个参数，每变化一个值就存一份不同的缓存
$tpl->display("mysmarty.html",$_SERVER["REQUEST_URI"]);
?>

<?php
class Page {
private $total; //数据表中总记录数
private $listRows; //每页显示行数
private $limit;
private $uri;
private $pageNum; //页数
private $config=array('header'=>"records", "prev"=>"prev", "next"=>"next", "first"=>"first", "last"=>"last");
private $listNum=8;
/*
* $total
* $listRows
*/
public function __construct($total, $listRows=10, $pa=""){
$this->total=$total;
$this->listRows=$listRows;
$this->uri=$this->getUri($pa);
$this->page=!empty($_GET["page"]) ? $_GET["page"] : 1;
$this->pageNum=ceil($this->total/$this->listRows);
$this->limit=$this->setLimit();
}

private function setLimit(){
return "Limit ".($this->page-1)*$this->listRows.", {$this->listRows}";
}

private function getUri($pa){
$url=$_SERVER["REQUEST_URI"].(strpos($_SERVER["REQUEST_URI"], '?')?'':"?").$pa;
$parse=parse_url($url);

if(isset($parse["query"])){
parse_str($parse['query'],$params);
unset($params["page"]);
$url=$parse['path'].'?'.http_build_query($params);

}

return $url;
}

public function __get($args){
if($args=="limit")
return $this->limit;
else
return null;
}

private function start(){
if($this->total==0)
return 0;
else
return ($this->page-1)*$this->listRows+1;
}

private function end(){
return min($this->page*$this->listRows,$this->total);
}

private function first(){
if($this->page==1)
@$html.='';
else
@$html.="  <a href='{$this->uri}&page=1'>{$this->config["first"]}</a>  ";

return $html;
}

private function prev(){
if($this->page==1)
@$html.='';
else
@$html.="  <a href='{$this->uri}&page=".($this->page-1)."'>{$this->config["prev"]}</a>  ";

return $html;
}

private function pageList(){
$linkPage="";

$inum=floor($this->listNum/2);

for($i=$inum; $i>=1; $i--){
$page=$this->page-$i;

if($page<1)
continue;

$linkPage.=" <a href='{$this->uri}&page={$page}'>{$page}</a> ";

}

$linkPage.=" {$this->page} ";

for($i=1; $i<=$inum; $i++){
$page=$this->page+$i;
if($page<=$this->pageNum)
$linkPage.=" <a href='{$this->uri}&page={$page}'>{$page}</a> ";
else
break;
}
return $linkPage;
}

private function next(){
if($this->page==$this->pageNum)
@$html.='';
else
@$html.="  <a href='{$this->uri}&page=".($this->page+1)."'>{$this->config["next"]}</a>  ";
return $html;
}

private function last(){
if($this->page==$this->pageNum)
@$html.='';
else
@$html.="  <a href='{$this->uri}&page=".($this->pageNum)."'>{$this->config["last"]}</a>  ";
return $html;
}

private function goPage(){
return '  <input type="text" onkeydown="javascript:if(event.keyCode==13){var page=(this.value>'.$this->pageNum.')?'.$this->pageNum.':this.value;location=\''.$this->uri.'&page=\'+page+\'\'}" value="'.$this->page.'" style="width:25px"><input type="button" value="GO" onclick="javascript:var page=(this.previousSibling.value>'.$this->pageNum.')?'.$this->pageNum.':this.previousSibling.value;location=\''.$this->uri.'&page=\'+page+\'\'">  ';
}
function fpage($display=array(0,1,2,3,4,5,6,7,8)){
$html[0]="  total:<b>{$this->total}</b>{$this->config["header"]}  ";
$html[1]="  pageSize:<b>".($this->end()-$this->start()+1)."</b>,currentSize:<b>{$this->start()}-{$this->end()}</b>  ";
$html[2]="  <b>{$this->page}/{$this->pageNum}</b>  ";

$html[3]=$this->first();
$html[4]=$this->prev();
$html[5]=$this->pageList();
$html[6]=$this->next();
$html[7]=$this->last();
$html[8]=$this->goPage();
$fpage='';
foreach($display as $index){
$fpage.=$html[$index];
}
return $fpage;
}
}

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title><!--{$title}--></title>
</head>
<body>
<!--{nocache}-->
<!--{$date}-->
<!--{/nocache}-->
<table	border="1" width="800">
<tr>
<th>行号</th>
<th>索引</th>
<th>ID</th>
<th>名称</th>
<th>价格</th>
</tr>
<!--{section loop=$secT name="ls"}-->
<tr>
<td><!--{$smarty.section.ls.rownum}--></td>
<td><!--{$smarty.section.ls.index}--></td>
<td><!--{$secT[ls].id}--></td>
<td><!--{$secT[ls].name}--></td>
<td><!--{$secT[ls].price}--></td>
</tr>
<!--{sectionelse}-->
<tr><td>数组为空，或没有分配</td></tr>
<!--{/section}-->
<tr>
<td colspan="5"><!--{$fpage}--></td>
</tr>
</table>
<br>
</body>
</html>