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php ob_start() ob_end_flush()缓存技术简单应用

2013-09-05 19:26 796 查看
本文章介绍了一个简单的关于php入门篇-缓存技术简单应用，有需要的朋友可以看看哦，这里是利用了ob_start(); ob_end_flush(); 来实例的。
<?php 
// define the path and name of cached file 
$cachefile = 'cached-files/'.date('M-d-Y').'.php'; 
// define how long we want to keep the file in seconds. I set mine to 5 hours. 
$cachetime = 18000; 
// Check if the cached file is still fresh. If it is, serve it up and exit. 
if (file_exists($cachefile) && time() - $cachetime < filemtime($cachefile)) { 
include($cachefile); 
exit; 
} 
// if there is either no file OR the file to too old, render the page and capture the HTML. 
ob_start(); 
?> 
<html> 
output all your html here. 
</html> 
<?php 
// We're done! Save the cached content to a file 
$fp = fopen($cachefile, 'w'); 
fwrite($fp, ob_get_contents()); 
fclose($fp); 
// finally send browser output 
ob_end_flush(); 
?>
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