Detailed explanation of how to use static cache in ThinkPHP

ThinkPHP is an excellent PHP development framework that is widely used in Web development. Among them, static caching is one of its core functions. This article will introduce you to the use of static caching in ThinkPHP.

1. What is static cache

Static cache is to save some data that is not frequently modified in memory when the program is running. This data does not need to be changed. Once cached, it can be used directly in subsequent requests, thus greatly speeding up the running speed of the program. Static caching is suitable for scenarios that do not require high real-time performance, such as carousel images, advertising spaces, etc.

2. Use of ThinkPHP static cache

1. Enable static cache

It is very simple to enable static cache in ThinkPHP. You only need to configure the application in the configuration file. Just set the following parameters in:

'HTML_CACHE_ON' => true,   // 开启静态缓存
'HTML_CACHE_TIME' => 3600, // 缓存时间（单位为秒）
'HTML_FILE_SUFFIX' => '.html', // 缓存文件的后缀名
'HTML_CACHE_RULES' => array(
    '*' => array('{$_SERVER.REQUEST_URI|md5}', '{$_SERVER.REQUEST_URI|md5}.html'),
),

2. Configure cache rules

In the above configuration, HTML_CACHE_RULES is the setting of cache rules. It is an array and multiple rules can be set. Among them, '*' represents the default caching rule for all controllers. The first parameter in the rule is the name of the cache file, and the second parameter is the path to the cache file.

3. Call static cache

When using static cache, you need to use the following code in the controller:

if ($this->html_cache_on) {
    if ($this->html_is_cache()) {
        exit(); // 直接输出缓存的数据
    }
}

$this->assign("name", "ThinkPHP");
$this->display();

The above code can make the program first Determine whether there is a cache file, and if so, directly output the data in the cache file.

4. Clear cache

During the development process, we may need to clear the cache. At this time, you only need to delete the cache file and ThinkPHP will automatically regenerate it.

3. Summary

Static caching is an effective means to improve the performance of Web programs. Especially for data that does not change frequently, using static caching can greatly improve the efficiency of the program. This article introduces how to use ThinkPHP static cache. The function of static cache can be easily realized through reasonable configuration.

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