Using a quick and accessible storage system to hold frequently used data or content, caching enhances the speed and scalability of web applications.
Yii PHP framework can help you optimize your web application by offering a variety of caching components and strategies. In this article, you will discover which Yii caching best practices and how to implement them.
Yii supports a variety of caching components, including APC, Memcache, Redis, file caches, and database caches. Each has pros and cons depending on your application's needs and the surrounding conditions.
File cache, for instance, is simple to set up and operate. Still, it might not be appropriate in distributed or high-concurrency scenarios. Redis and memcache are scalable and quick but need extra servers and configuration.
PHP scripts can run faster with the help of APC, an opcode cache, but it does not retain data between requests. After determining which caching component best meets your needs, you should evaluate its dependability and performance.
Maintaining the consistency and currency of the cached data with the original data source is one of the challenges associated with caching.
Yii offers two methods-dependency and expiration-for invalidating cache. A dependency is the criteria that establish whether the data in the cache is still valid. As an illustration, you can use a custom expression, the outcome of a database query, or the file modification time as a dependency.
The term "expiration" refers to the duration of use for which the cached data is valid. For instance, you can designate an expiration time of one week, one day, or one hour. When data changes or gets stale, you should use dependency and expiration to invalidate the cache.
You can also cache pages and parts of your web application with Yii. When you have a dynamic page with some expense to generate static or semi-static content, fragment caching comes in handy.
For instance, you can cache a menu, sidebar, or footer if they are not updated often. Page caching can be helpful when a page is mostly static or does not require user input. For instance, a product page, blog post, or landing page that doesn't change depending on the user session can be cached.
You should use fragment and page caching to lower server load and enhance user experience.
You may need to cache different versions of the same data or content for various scenarios or users. Cache variations and hierarchies are two features that Yii offers to assist you in doing this.
You can add extra keys to the cache ID called cache variations to differentiate between distinct cache entries. As an illustration, you can use the device type, user role, or language as cache variations. You can create and remove cache hierarchies, which are collections of nested cache entries collectively.
For instance, you can store the common data for a category in a parent cache entry, and the unique data for each item in the category can be stored in child cache entries. Cache hierarchies and variations are what you should use to handle complex caching scenarios.
You can also use Yii's events and behaviors to control and personalize caching. Cache events are initiated When specific operations occur on the cache component, like before and after saving, retrieving, or deleting cache entries.
Event handlers can be attached to these events for extra procedures or logic. You could update the cache statistics or log the hits and misses from the cache. Classes "cache behaviors" implement various standard caching features you can add to your controllers, views, or models.
For instance, you can use the timestamp behavior as a dependency for caching and have your model's timestamp attribute automatically updated when saved or deleted. It would help to use cache events and behaviors to improve and expand the caching functionality.
Also Read: Yii Framework Guide: Accelerate Development With 50% Efficiency
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Yii offers a number of caching options, including HTTP caching, data caching, fragment caching, and page caching.
Arbitrary data is stored in a cache component, like APC, Memcached, or Redis, through data caching. A portion of a view is stored in a cache component through fragment caching. With page caching, a cache element or file contains the entire output of a controller action.
By utilizing the features of the HTTP protocol, HTTP caching lowers network traffic and server load.
When selecting a caching method for a Yii application, you must consider several factors, including the size and frequency of the data or components, the complexity and cost of generating them, the requirements for consistency and freshness, and the available cache storage options.
For instance, you may use data caching or fragment caching with a persistent cache component if your data is costly to compute and changes infrequently. Use page caching or HTTP with a file cache or a CDN if you have frequently accessed static pages without dynamic content.
It would help if you considered the advantages and disadvantages of each caching technique and your requirements and objectives.
For instance, you have more flexibility and control over how to cache data and fragment caching. Still, they also require more code and configuration. Although HTTP and page caching are simpler and can greatly lower server load, they have more restrictions and warnings, like cache invalidation, user authentication, and dynamic content.
You must test and track the impact of caching on your Yii app's functionality and performance before deciding on the optimal caching strategy.
To monitor and assess your application's execution time, memory usage, database queries, and cache hits and misses use tools like Yii Debugger, Yii Profiler, or Yii Log. Additionally, using tools like Apache Benchmark, Siege, or JMeter, you can simulate various load scenarios and compare your application's response time, throughput, and error rate with and without caching.
Lastly, you can use these best practices and pointers to select and implement the best caching strategy for Yii app:
Avoid caching nothing at all or everything.
Avoid caching data or components that are rarely used or change frequently; instead, focus on the most important and frequently occurring information.
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Below are the following main advantages of PHP YII framework:
Unlike other frameworks, YII does not require writing separate validation rules for the inputs.
This is because YII incorporates both server-side and client-side validation.
All you have to do is turn on or off the validation rule.
Moreover, YII has built-in support for authentication.
Additionally, it encourages authorization through role-based, hierarchical access control.
The "request per second" (RPS) basis for performance is used.
The number of requests a framework-written application can handle each second is measured by its RPS.
The framework performs at a higher level the higher the RPS.
High performance is achieved when the PHP extension APC is enabled.
It offers several cache components, allowing users to store data in cache across a range of media.
YII's caching system is the best.
DB-based page and segment caching, APC, XCache, and Memcache are all supported by YII.
Web applications must be optimized to provide rich user experiences across all memory-intensive platforms and devices.
Yii effectively facilitates the optimization process for web applications.
The query builder feature is offered by YII.
Excellent caching features of this tool allow users to store cached data across multiple media.
As a result, YII produces a very strong yet dependable caching system that, for added convenience, supports XCache, Memcache, ABC, and DB-based pages.
It's incredibly straightforward code structure is what gives it this wonderful quality.
This enables developers to use various extensions and widgets based on the needs of their web projects.
YII has a strong object-centricity.
As a result, it fits well with object-oriented web programming.
Its clean architectural design makes it incredibly easy to expand.
If you are familiar with object-oriented programming, don't hesitate to choose YII!
Using caching to optimize your application's performance is a good idea. Static data is kept in the cache by caching mechanisms, which retrieve it when needed.
The cache can store basic information on the server side, like the most recent news articles. Whole web pages or just portions of them can be stored. The most recently visited pages can be retained in the browser cache on the client side by using HTTP caching.
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