Official download guide for Ouyi Exchange app: Android users can download it through the Google Play Store, and iOS users can download it through the Apple App Store. Visit the official website www.ouyiex.com to register and log in. Both the application and the official website provide rich transaction and management functions.

The steps to create a package in Laravel include: 1) Understanding the advantages of packages, such as modularity and reuse; 2) following Laravel naming and structural specifications; 3) creating a service provider using artisan command; 4) publishing configuration files correctly; 5) managing version control and publishing to Packagist; 6) performing rigorous testing; 7) writing detailed documentation; 8) ensuring compatibility with different Laravel versions.

Middleware is a filtering mechanism in Laravel that is used to intercept and process HTTP requests. Use steps: 1. Create middleware: Use the command "phpartisanmake:middlewareCheckRole". 2. Define processing logic: Write specific logic in the generated file. 3. Register middleware: Add middleware in Kernel.php. 4. Use middleware: Apply middleware in routing definition.

Laravel's page caching strategy can significantly improve website performance. 1) Use cache helper functions to implement page caching, such as the Cache::remember method. 2) Select the appropriate cache backend, such as Redis. 3) Pay attention to data consistency issues, and you can use fine-grained caches or event listeners to clear the cache. 4) Further optimization is combined with routing cache, view cache and cache tags. By rationally applying these strategies, website performance can be effectively improved.

MySQL itself does not have built-in data sharding function, but can be implemented through architectural design and tools. Data sharding is to split large table data into multiple databases or tables according to rules to improve performance. Common implementation methods include: 1. Hashing fragments by user ID, which are evenly distributed but troublesome to expand capacity; 2. Shaving fragments by range, which are suitable for time-class fields but are easy to hot spots; 3. Consistent hashing algorithms, which reduce the amount of expansion migration but complex implementation. After sharding, cross-slice query, data migration, distributed transactions and other problems need to be dealt with. Middleware such as MyCat, Vitess or application layer logic processing can be used, and shard keys should be selected reasonably, shard balance should be monitored, excessive sharding should be avoided, and backup strategies should be improved.

Laravel'sMVCarchitecturecanfaceseveralissues:1)Fatcontrollerscanbeavoidedbydelegatinglogictoservices.2)Overloadedmodelsshouldfocusondataaccess.3)Viewsshouldremainsimple,avoidingPHPlogic.4)PerformanceissueslikeN 1queriescanbemitigatedwitheagerloading.

Using Seeder to fill test data in Laravel is a very practical trick in the development process. Below I will explain in detail how to achieve this, and share some problems and solutions I encountered in actual projects. In Laravel, Seeder is a tool used to populate databases. It can help us quickly generate test data, which facilitates development and testing. Using Seeder not only saves time, but also ensures data consistency, which is especially important for team collaboration and automated testing. I remember that in a project, we needed to generate a large amount of product and user data for an e-commerce platform, and Seeder came in handy at that time. Let's see how to use it. First, make sure your Lara is

In Laravel, lazy loading issues can be solved through preloading and lazy loading. 1. Use preloading (EagerLoading) to load all relevant data in a single query, avoiding multiple queries, such as $users=User::with('posts')->get(). 2. Lazy loading (LazyEagerLoading) provides finer granular control, such as $users->load('posts',function($query){$query->where('status','published');}). 3. For large data sets, you can combine cursors (C)