PHP caching techniques through file storage

This article mainly introduces the techniques of PHP caching through file storage. Interested friends can refer to it. I hope it will be helpful to everyone.

The example in this article describes the method of PHP caching based on file storage, as follows:

When some database data records are large, but the server is limited, a MySQL query may be several One hundred milliseconds. A simple page usually has more than a dozen queries. At this time, it takes several seconds to load the page. If the concurrency is high, the server will basically be paralyzed, causing a page to be unable to load for a long time. At this time, we You can use file caching to relieve the pressure on MySQL. Here is an example of use.

<?php
//页面业务逻辑处理，获得结果
$objPage = new Page_IndexModel($arrParams);
//一系列的业务逻辑放在了objPage中，调用process方法获得结果集
$arrResult = $objPage->process();
//获得结果后smarty赋值
$smarty->assign($arrResult);
//输出模板
$smarty->display();
?>

Now we use file caching to skip the Page business processing step

<?php
$cachFile = &#39;./index.php&#39;;
//缓存文件存在且时间不超过一小时，则直接使用缓存的结果集，不在进行任何的MySQL查询了
if(file_exists($cacheFile) && time()-filemtime($cachFile) < 3600) {
  //使用缓存中的结果
  $arrResult = include($cachFile);
} else {
  $objPage = new Page_IndexModel($arrParams);
  $arrResult = $objPage->process();
  $strContent = "<?php \n return ".var_export($arrResult, true)."\n;";
  //将结果集缓存
  file_put_contents($cachFile, $strContent);
}
//获得结果后smarty赋值
$smarty->assign($arrResult);
//输出模板
$smarty->display();

Summary: The above is the entire content of this article, I hope it can help everyone learn Helps.

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