Use composer to implement automatic namespace loading and simple route resolution

Implement forced routing through closure functions

Chain operation realizes addition, deletion, modification and query of database (single case mode)

Chain operation realizes addition, deletion, modification and query of database

Implement database document generation and export tools

Yield significantly reduces server memory usage

One class handles all Excel operations (including image export)

One class handles all Excel operations (export multiple worksheets)

One class handles pdf output, printing, and downloading

Command line operations and interaction with users under the command line

60 lines of code handle all curl requests

60 lines of code to handle all curl requests (includes explanation of curl setting parameters)

Automatically generate and return thumbnails based on url request parameters

PHP implements image search (generates image hash value to calculate similarity)

Implement AOP aspect programming and reduce code coupling

One method to obtain request parameters and request headers in all request modes

Implement parameter verification through validators and customize verification rules

Coping with high concurrency: What are pessimistic locks and optimistic locks

Solving high concurrency: the practical application of pessimistic locking and optimistic locking

Combined with crontab to implement scheduled tasks: production investment of tasks

Implementation of middleware, adding middleware to routing

Implementation of dependency injection and explanation of PHP reflection class

Event monitoring and subscription

High-concurrency rush buying: dealing with rush buying scenarios through message queues

Implementation and application of rpc microservices

Implementation of annotation routing

Implementation of interface current limiting and the pros and cons of elegant code

Implementation of atomic locks and cache drivers