仅缓存PHP页面的一部分 [英] Cache only part of a page in PHP

问题描述

是否可以仅在PHP中缓存页面的特定部分，或在PHP脚本中缓存特定代码部分的输出？看来，当我尝试缓存特定页面时，它会缓存整个我不想要的页面，页面中的某些内容应随每次页面加载而更新，而其他内容（例如具有数据库数据的下拉列表） ）仅需要每小时左右进行更新。

Is it possible to cache only a specific part of a page in PHP, or the output of a specific section of code in the PHP script? It seems when I try to cache a particular page, it caches the whole page which is not want I want, some of the content in my page should be updated with every page load while others (such as a dropdown list with data from a database) only needs to be updated every hour or so.

推荐答案

Zend_Cache

我可能会为此使用Zend Frameworks Zend_Cache 库。

您可以使用此组件而无需使用整个框架。

You can just use this component without needing to use the entire framework.

转到 Zend Framework下载页面并获取最新版本。

下载核心文件后，您需要在项目中包含Zend_Cache。
Zend_Cache 文档。

After you have downloaded the core files, you will need to include Zend_Cache in your project. Zend_Cache docs.

您是否已决定要如何缓存数据？您正在使用文件系统吗？还是您是Memcache？一旦知道要使用的对象，就需要使用特定的Zend_Cache后端。

Have you decided how you want to cache your data? Are you using a file system? Or are you memcache? Once you know which you are going to use, you need to use a specific Zend_Cache backend.

• 您需要使用后端（如何在存储中缓存要缓存的内容）和


• 您需要使用前端（您实际上是如何缓存的。.例如使用缓冲区，或缓存函数结果等）

后端文档： Zend_Cache后端
前端文档： Zend_Cache前端

做这样的事情...

<?php
// configure caching backend strategy
$backend = new Zend_Cache_Backend_Memcached(
    array(
        'servers' => array( array(
            'host' => '127.0.0.1',
            'port' => '11211'
        ) ),
        'compression' => true
) );

// configure caching frontend strategy
$frontend = new Zend_Cache_Frontend_Output(
    array(
        'caching' => true,
        'cache_id_prefix' => 'myApp',
        'write_control' => true,
        'automatic_serialization' => true,
        'ignore_user_abort' => true
    ) );

// build a caching object
$cache = Zend_Cache::factory( $frontend, $backend );

这将创建一个使用 Zend_Cache_Frontend_Output 缓存机制。

This would create a cache which makes use of the Zend_Cache_Frontend_Output caching mechanisms.

要使用想要的 Zend_Cache_Frontend_Output ，它将为简单。您可以使用 output 代替核心。您传递的选项是相同的。然后要使用它，您将：

To use Zend_Cache_Frontend_Output which is want you want, it would be simple. Instead of the core you would use output. The options which you pass are identical. Then to use it you would:

// if it is a cache miss, output buffering is triggered
if (!($cache->start('mypage'))) {

    // output everything as usual
    echo 'Hello world! ';
    echo 'This is cached ('.time().') ';

    $cache->end(); // output buffering ends

}

echo 'This is never cached ('.time().').';

有用的博客： http://perevodik.net/en/posts/14/

对不起，这个问题写的时间比预期的长我看到了很多答案！

Sorry this question took longer to write than expected and lots of answers have been written I see!

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