With the development of the Internet, the number of visits to websites or applications is getting higher and higher, and data processing is becoming more and more complex, which makes the optimization of application architecture and website performance very important. Laravel is a popular PHP framework with many excellent features such as caching. Caching can significantly improve the performance of web applications, but due to the nature of caching, caches can become invalid, so a strategy is needed to regularly check and update the cache. Laravel cache invalidation strategies will be discussed below.

Laravel Cache

Laravel cache is a method of storing temporary data in a web application. It can significantly improve the speed and performance of web applications. The Laravel framework has many excellent cache drivers, such as file cache, database cache, Redis cache, etc. Caching can help reduce the number of database queries for web applications, reduce response times, and improve application performance.

Laravel Cache Invalidation

Although caching can help improve the performance of web applications, the nature of caching itself means that the cache will expire at some point. For example, when your application updates data, the cache must be updated to reflect the latest information. This means that cache invalidation is very important and requires a strategy to manage it.

Laravel cache invalidation strategy

Laravel provides a variety of cache invalidation strategies:

1. Time-related invalidation (Time-To-Live)

This Is a time-based invalidation strategy in which the cache is cleared because it is older than a predefined timestamp. In Laravel, this expiration strategy can be implemented using the put() or remember() method and the corresponding validity period. For example:

//Store data in cache and expire after 1 hour
Cache::put('key', 'value', 3600);

2. Event Listener

This invalidation strategy is called a "cache tag" in Laravel. The cache can be marked with a tag, and when the tag becomes "unused" the cache will be cleared. For example, we can use this invalidation policy to mark the cache as "stale" when the consumer updates the data, and then change the mark to "new" when the data is updated. Cache Tags can be used in Laravel to achieve this functionality.

3. Manual invalidation

Manual invalidation refers to manually refreshing the cache before the cache expires. This can be achieved by manually triggering actions in the system, such as refreshing the cache when the user updates data. In Laravel, you can use the forget() or flush() method to clear the cache, or use the rememberForever() method to store the cache permanently.

Summary

Laravel cache invalidation strategy is an important part of managing Laravel cache. Whether you use time-related invalidations, event listeners, or manual invalidations, you need to set up a good invalidation strategy to avoid additional database query and response delays. Finally, you should also use appropriate cache drivers and server hardware for optimal performance.

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