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文件缓存

2016-03-16 10:39 429 查看

不多说，看代码

Head.php

<?php
define('CACHE_EXPIRE',1800);  //设置过期时间
define('CACHE_PATH',$_SERVER['DOCUMENT_ROOT'].'/cache/'); //设置缓存目录
define('REFRESH_EXPIRE',10);
is_dir(CACHE_PATH) or mkdir(CACHE_PATH,0777);

//该方法是获得用户的刷新次数，如果用户连续两次刷新，那么就显示最新内容
function refreshTimes(){
$currentUrl='http://'.$_SERVER["HTTP_HOST"].$_SERVER['REQUEST_URI'];
if(isset($_COOKIE['refreshTimes'])){
$cookArray=explode("\t",$_COOKIE['refreshTimes']);
if(isset($cookArray[1]) and $_SERVER['REQUEST_TIME'] - (int)$cookArray[1] < REFRESH_EXPIRE and isset($cookArray[0]) and $cookArray[0] == $currentUrl){
setcookie('refreshTimes',$currentUrl."\t".$_SERVER['REQUEST_TIME']."\t".(string)((int)$cookArray[2]+1),0,'/');
return (int)$cookArray[2];
}else{
setcookie('refreshTimes',$currentUrl."\t".$_SERVER['REQUEST_TIME']."\t1",0,'/');
return 0;
}
}else{
setcookie('refreshTimes',$currentUrl."\t".$_SERVER['REQUEST_TIME']."\t1",0,'/');
return 0;
}
}

$key = md5($_SERVER['REQUEST_URI']);
$path = CACHE_PATH.$key;

if(is_file($path)
and filemtime($path)+CACHE_EXPIRE > $_SERVER['REQUEST_TIME']
and refreshTimes() == 0
){
readfile($path);
exit();
}

ob_start();
?>

foot.php

<?php

$html = ob_get_contents();
ob_clean();

file_put_contents($path,$html);

echo $html;

?>

test.php

<?php
include 'head.php';

$title = "Hello world~";
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title><?php echo $title?></title>
</head>

<body>
<?php
echo "是大方大方";
?>
</body>
</html>
<?php
include 'foot.php';
?>

//其他看到的很全的php文件缓存

看http://www.cnblogs.com/coolid/archive/2012/09/14/2684373.html 链接

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