Detailed explanation of how thinkphp closes all caches

When using ThinkPHP for development, we often encounter caching problems, such as caching causing pages not to be updated, cache leaks, etc. What should we do when we want to turn off all caches?

First, we need to understand the caching mechanism in ThinkPHP. ThinkPHP provides us with a variety of caching methods, including file caching, Redis caching, Memcached caching, etc. Moreover, in different usage scenarios, different caching methods will have different applicability.

Therefore, we cannot simply turn off all caches, otherwise it may affect the performance and stability of the application. However, if you really need to turn off all caches in a specific scenario, we can follow the steps below:

1. Modify the configuration file

In the application's config directory, open the app.php configuration file. Find the following code:

// 是否开启缓存
'cache'                  => [
    'type'   => 'File',
    // 全局缓存有效期（秒）
    'expire' => 0,
    // 缓存前缀
    'prefix' => '',
    // 缓存目录（File缓存方式有效）
    'path'   => '',
],

Set expire to 0, which means to turn off the global cache. As shown below:

// 是否开启缓存
'cache'                  => [
    'type'   => 'File',
    // 全局缓存有效期（秒）
    'expire' => 0,
    // 缓存前缀
    'prefix' => '',
    // 缓存目录（File缓存方式有效）
    'path'   => '',
],

2. Clear cache files

After turning off the global cache, we need to manually clear the cache files that have been generated. You can execute the following statement:

think optimize:clear

Alternatively, we can directly delete all files in the runtime directory.

The above two steps can completely turn off all caches. However, it should be noted that after turning off the global cache, the page and data need to be regenerated for each request, which will greatly reduce performance and response speed.

Therefore, in actual development, we should choose appropriate caching methods based on specific needs and scenarios to avoid problems caused by caching. If you do need to turn off caching, you'll need to conduct a thorough assessment of your application's performance and responsiveness to make an informed decision.

In short, caching is very important for an application. We should handle it carefully and choose an appropriate caching strategy to optimize performance and improve user experience.

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