缓存技术
内容导读
互联网集市收集整理的这篇技术教程文章主要介绍了缓存技术，小编现在分享给大家，供广大互联网技能从业者学习和参考。文章包含7744字，纯文字阅读大概需要12分钟。
内容图文
smarty局部不缓存
{nocache}
{/nocache}
高效率内存缓存
memcached
自己写的缓存
缓存头部
-
<?
php
-
$ctime
=
150
;
-
//自动创建cache目录来存放缓存的html文件
-
$path
=
"cache/"
;
-
if
(
file_exists
(
$path
)){
-
}
else
{
-
mkdir
(
$path
,
0777
,
true
);
-
}
-
$fileinfo
=
$_SERVER
[
‘REQUEST_URI‘
];
-
//$fn
=
pathinfo
(
$fileinfo
,
PATHINFO_FILENAME
);
//输出myc
-
//echo $fn
.
‘<br>‘
;
-
$cy
=
md5
(
$fileinfo
);
//使html的前缀用md5的加密方式
-
$currpage
=
isset
(
$_GET
[
‘p‘
])
?
$_GET
[
‘p‘
]
:
1
;
-
$id
=
isset
(
$_GET
[
‘id‘
])
?
$_GET
[
‘id‘
]
:
1
;
-
$cf
=
$path
.
$cy
.
$currpage
.
‘_‘
.
$id
.
‘.html‘
;
-
ob_start
();
-
// echo filemtime($cf);
-
// echo ‘<br>‘;
-
// echo time()-filemtime($cf);//判断缓存时间差
-
//判断缓存时间是否失效
-
if
(
file_exists
(
$cf
)
&&
(
time
()-
filemtime
(
$cf
))<
$ctime
){
-
include $cf
;
-
exit
;
-
}
-
?>
缓存结尾
-
<?
php
-
$html
=
ob_get_contents
();
-
file_put_contents
(
$cf
,
$html
);
-
?>
缓存案例
-
<?
php
-
$ctime
=
150
;
-
//自动创建cache目录来存放缓存的html文件
-
$path
=
"cache/"
;
-
if
(
file_exists
(
$path
)){
-
}
else
{
-
mkdir
(
$path
,
0777
,
true
);
-
}
-
$fileinfo
=
$_SERVER
[
‘REQUEST_URI‘
];
-
// // $fn= pathinfo($fileinfo,PATHINFO_FILENAME);//输出myc
-
// echo $fn.‘<br>‘;
-
$cy
=
md5
(
$fileinfo
);
//使html的前缀用md5的加密方式
-
$currpage
=
isset
(
$_GET
[
‘p‘
])
?
$_GET
[
‘p‘
]
:
1
;
-
$id
=
isset
(
$_GET
[
‘id‘
])
?
$_GET
[
‘id‘
]
:
1
;
-
$cf
=
$path
.
$cy
.
$currpage
.
‘_‘
.
$id
.
‘.html‘
;
-
ob_start
();
-
// echo filemtime($cf);
-
// echo ‘<br>‘;
-
// echo time()-filemtime($cf);//判断缓存时间差
-
//判断缓存时间是否失效
-
if
(
file_exists
(
$cf
)
&&
(
time
()-
filemtime
(
$cf
))<
$ctime
){
-
include $cf
;
-
exit
;
-
}
-
require_once
‘inc/libs/Smarty.class.php‘
;
-
include
‘inc/Db.class.php‘
;
-
$db
=
new
Db
();
-
$s
=
new
Smarty
();
-
// echo $s::SMARTY_VERSION;
-
// echo smarty::SMARTY_VERSION;//输出版本号
-
$s
->
debugging
=
false
;
//关闭调试
-
$s
->
caching
=
false
;
//关闭缓存
-
$s
->
setTemplateDir
(
‘inc/html/‘
);
//设置模板文件路径
-
$s
->
setCacheDir
(
‘inc/cache/‘
);
//如果开启了缓存，设定缓存目录
-
$s
->
setCompileDir
(
‘inc/compile/‘
);
//设定模板编译后的路径
-
$f
=
isset
(
$_GET
[
‘i‘
])
?
$_GET
[
‘i‘
]
:
‘index‘
;
-
switch
(
$f
){
-
case
‘teacher‘
;
-
// $trs=$db->query(‘teacher‘,‘*‘,"flag=‘y‘",‘order by sort desc‘);
-
// $db->css1();
-
$currpage
=
isset
(
$_GET
[
‘p‘
])
?
$_GET
[
‘p‘
]
:
1
;
-
$trs
=
$db
->
pager
(
‘teacher‘
,
$currpage
,
‘*‘
,
2
,
"flag=‘y‘"
,
‘order by sort desc‘
,
‘i=teacher&‘
);
-
$s
->
assign
(
‘trs‘
,
$trs
);
-
$s
->
assign
(
‘page‘
,
$trs
[
1
]);
-
break
;
-
case
‘jy‘
;
-
// $db->css1();
-
$currpage
=
isset
(
$_GET
[
‘p‘
])
?
$_GET
[
‘p‘
]
:
1
;
-
$srs
=
$db
->
pager
(
‘job‘
,
$currpage
,
‘*‘
,
6
,
‘1=1‘
,
‘order by id desc‘
,
‘i=jy&‘
);
-
$s
->
assign
(
‘srs‘
,
$srs
);
-
$s
->
assign
(
‘page‘
,
$srs
[
1
]);
-
break
;
-
case
‘newsarticle‘
;
-
$id
=
$_GET
[
‘nid‘
];
-
$db
->
updatenum
(
‘news‘
,
‘num=num+1‘
,
‘id=‘
.
$id
);
-
$new
=
$db
->
query
(
‘news‘
,
‘*‘
,
‘id=‘
.
$id
,
‘order by id desc‘
);
-
$s
->
assign
(
‘new‘
,
$new
);
-
break
;
-
-
case
‘news‘
;
-
// $db->css1();
-
$cn
=
$_GET
[
‘cname‘
];
-
$currpage
=
isset
(
$_GET
[
‘p‘
])
?
$_GET
[
‘p‘
]
:
1
;
-
$nn
=
$db
->
pager
(
‘news‘
,
$currpage
,
‘*‘
,
10
,
"flag=‘y‘ and cname=‘$cn‘"
,
‘order by id desc‘
,
‘i=news&cname=‘
.
$cn
.
‘&‘
);
-
$s
->
assign
(
‘nn‘
,
$nn
);
-
default
:
-
$trs
=
$db
->
query
(
‘teacher‘
,
‘*‘
,
‘1=1‘
,
‘order by sort desc‘
,
‘limit 2‘
);
-
$s
->
assign
(
‘trs‘
,
$trs
);
-
-
$zx
=
$db
->
query
(
‘news‘
,
‘*‘
,
"flag=‘y‘ and cname=‘网络营销资讯‘"
,
‘order by id desc‘
,
‘limit 7‘
);
-
$s
->
assign
(
‘zx‘
,
$zx
);
-
-
$zs
=
$db
->
query
(
‘news‘
,
‘*‘
,
"flag=‘y‘ and cname=‘网络营销知识‘"
,
‘order by id desc‘
,
‘limit 7‘
);
-
$s
->
assign
(
‘zs‘
,
$zs
);
-
-
$zjy
=
$db
->
query
(
‘news‘
,
‘*‘
,
"flag=‘y‘ and cname=‘最新就业信息‘"
,
‘order by id desc‘
,
‘limit 7‘
);
-
$s
->
assign
(
‘zjy‘
,
$zjy
);
-
break
;
-
-
$zxk
=
$db
->
query
(
‘news‘
,
‘*‘
,
"flag=‘y‘ and cname=‘网络营销课程‘"
,
‘order by id desc‘
,
‘limit 7‘
);
-
$s
->
assign
(
‘zxk‘
,
$zxk
);
-
break
;
-
}
-
$zjy
=
$db
->
query
(
‘news‘
,
‘*‘
,
"flag=‘y‘ and cname=‘最新就业信息‘"
,
‘order by id desc‘
,
‘limit 7‘
);
-
$s
->
assign
(
‘zjy‘
,
$zjy
);
-
$s
->
assign
(
‘zxy‘
,
urlencode
(
‘最新就业信息‘
));
//解决ie里面的乱码问题
-
$s
->
assign
(
‘zxs‘
,
urlencode
(
‘网络营销资讯‘
));
-
$s
->
assign
(
‘zss‘
,
urlencode
(
‘网络营销知识‘
));
-
$s
->
assign
(
‘zsy‘
,
urlencode
(
‘网络营销课程‘
));
-
$s
->
display
(
$f
.
‘.html‘
);
-
$html
=
ob_get_contents
();
-
file_put_contents
(
$cf
,
$html
);
使用smarty配合缓存技术
-
<?
php
-
require_once
‘inc/libs/Smarty.class.php‘
;
-
$s
=
new
Smarty
();
-
// echo $s::SMARTY_VERSION;
-
// echo smarty::SMARTY_VERSION;//输出版本号
-
$s
->
debugging
=
false
;
//关闭调试
-
$s
->
caching
=
true
;
//关闭缓存
-
$s
->
cache_lifetime
=
3600
;
//设定缓存时间
-
$s
->
setTemplateDir
(
‘inc/html/‘
);
//设置模板文件路径
-
$s
->
setCacheDir
(
‘inc/cache/‘
);
//如果开启了缓存，设定缓存目录
-
$s
->
setCompileDir
(
‘inc/compile/‘
);
//设定模板编译后的路径
-
$s
->
setConfigDir
(
‘inc/config/‘
);
//设定smarty配置文件的目录
-
$f
=
isset
(
$_GET
[
‘i‘
])
?
$_GET
[
‘i‘
]
:
‘index‘
;
-
// $s->clearAllCache();
-
if
(
$s
->
isCached
(
$f
.
‘.html‘
)){
-
$s
->
display
(
$f
.
‘.html‘
);
-
exit
;
-
}
-
-
include
‘inc/Db.class.php‘
;
-
$db
=
new
Db
();
-
switch
(
$f
){
-
case
‘teacher‘
;
-
// $trs=$db->query(‘teacher‘,‘*‘,"flag=‘y‘",‘order by sort desc‘);
-
// $db->css1();//这样引入会打乱页面
-
$currpage
=
isset
(
$_GET
[
‘p‘
])
?
$_GET
[
‘p‘
]
:
1
;
-
$trs
=
$db
->
pager
(
‘teacher‘
,
$currpage
,
‘*‘
,
2
,
"flag=‘y‘"
,
‘order by sort desc‘
,
‘i=teacher&‘
);
-
$s
->
assign
(
‘trs‘
,
$trs
);
-
$s
->
assign
(
‘page‘
,
$trs
[
1
]);
-
break
;
-
case
‘jy‘
;
-
// $db->css1();
-
$currpage
=
isset
(
$_GET
[
‘p‘
])
?
$_GET
[
‘p‘
]
:
1
;
-
$srs
=
$db
->
pager
(
‘job‘
,
$currpage
,
‘*‘
,
6
,
‘1=1‘
,
‘order by id desc‘
,
‘i=jy&‘
);
-
$s
->
assign
(
‘srs‘
,
$srs
);
-
$s
->
assign
(
‘page‘
,
$srs
[
1
]);
-
break
;
-
case
‘newsarticle‘
;
-
$id
=
$_GET
[
‘nid‘
];
-
$db
->
updatenum
(
‘news‘
,
‘num=num+1‘
,
‘id=‘
.
$id
);
-
$new
=
$db
->
query
(
‘news‘
,
‘*‘
,
‘id=‘
.
$id
,
‘order by id desc‘
);
-
$s
->
assign
(
‘new‘
,
$new
);
-
break
;
-
-
case
‘news‘
;
-
// $db->css1();
-
$cn
=
$_GET
[
‘cname‘
];
-
$currpage
=
isset
(
$_GET
[
‘p‘
])
?
$_GET
[
‘p‘
]
:
1
;
-
$nn
=
$db
->
pager
(
‘news‘
,
$currpage
,
‘*‘
,
10
,
"flag=‘y‘ and cname=‘$cn‘"
,
‘order by id desc‘
,
‘i=news&cname=‘
.
$cn
.
‘&‘
);
-
$s
->
assign
(
‘nn‘
,
$nn
);
-
default
:
-
$trs
=
$db
->
query
(
‘teacher‘
,
‘*‘
,
‘1=1‘
,
‘order by sort desc‘
,
‘limit 2‘
);
-
$s
->
assign
(
‘trs‘
,
$trs
);
-
-
$zx
=
$db
->
query
(
‘news‘
,
‘*‘
,
"flag=‘y‘ and cname=‘网络营销资讯‘"
,
‘order by id desc‘
,
‘limit 7‘
);
-
$s
->
assign
(
‘zx‘
,
$zx
);
-
-
$zs
=
$db
->
query
(
‘news‘
,
‘*‘
,
"flag=‘y‘ and cname=‘网络营销知识‘"
,
‘order by id desc‘
,
‘limit 7‘
);
-
$s
->
assign
(
‘zs‘
,
$zs
);
-
-
$zjy
=
$db
->
query
(
‘news‘
,
‘*‘
,
"flag=‘y‘ and cname=‘最新就业信息‘"
,
‘order by id desc‘
,
‘limit 7‘
);
-
$s
->
assign
(
‘zjy‘
,
$zjy
);
-
break
;
-
-
$zxk
=
$db
->
query
(
‘news‘
,
‘*‘
,
"flag=‘y‘ and cname=‘网络营销课程‘"
,
‘order by id desc‘
,
‘limit 7‘
);
-
$s
->
assign
(
‘zxk‘
,
$zxk
);
-
break
;
-
}
-
$zjy
=
$db
->
query
(
‘news‘
,
‘*‘
,
"flag=‘y‘ and cname=‘最新就业信息‘"
,
‘order by id desc‘
,
‘limit 7‘
);
-
$s
->
assign
(
‘zjy‘
,
$zjy
);
-
$s
->
assign
(
‘zxy‘
,
urlencode
(
‘最新就业信息‘
));
//解决ie里面的乱码问题
-
$s
->
assign
(
‘zxs‘
,
urlencode
(
‘网络营销资讯‘
));
-
$s
->
assign
(
‘zss‘
,
urlencode
(
‘网络营销知识‘
));
-
$s
->
assign
(
‘zsy‘
,
urlencode
(
‘网络营销课程‘
));
-
$s
->
display
(
$f
.
‘.html‘
);
首先开启缓存
$s->caching=true;//关闭缓存
$s->clearAllCache();清除缓存目录
如果加入如下的此段代码，则页面中不能出现局部缓存{nocache},局部不缓存，立即修改的文件会立即显示
// if($s->isCached($f.‘.html‘)){
// $s->display($f.‘.html‘);
// exit;
// }
把如下的引入文件放到exit;后面
include ‘inc/Db.class.php‘;
$db=new Db(); smarty局部不缓存{nocache}
包含的局部缓存一定要在{foreach}外面，如果在里面$v肯定没有效果可以让局部缓存的部分不用{foreach}
刷新显示新的时间和数据
-
{
nocache
}
-
<h1>
{
date
(
‘Y-m-d H:i:s‘
)}</
h1
>
-
{/
nocache
}
{insert} {/insert}里面包含的文件都不能进行缓存
文本文件，软件配置文件的格式有
.ini
.xml
.conf
a
原文：http://www.cnblogs.com/lsr111/p/4629019.html
内容总结
以上是互联网集市为您收集整理的缓存技术全部内容，希望文章能够帮你解决缓存技术所遇到的程序开发问题。 如果觉得互联网集市技术教程内容还不错，欢迎将互联网集市网站推荐给程序员好友。
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