10 recommended articles about technical tutorials
Query expansion is used to try to broaden the scope of the full-text search results returned. Consider the following situation. You want to find all comments that mention anvils. Only one comment contains the word anvils , but you also want to find all other lines that may be relevant to your search, even if they don't contain anvils . This is also a task of query expansion. When using query expansion, MySQL performs two scans of the data and index to complete the search: 1. First, a basic full-text search is performed to find all rows that match the search criteria; 2. Second, MySQL checks these matching rows and selects all useful words (we will briefly explain how MySQL determines what is useful and what is not). 3. Next, MySQL performs a full-text search again, this time not only using the original conditions, but also using all useful words. Query expansion lets you find results that may be relevant, even if they don't contain the exact words you're looking for. Only available in MySQL version 4.1.1 or higher. The query expansion feature was introduced in MySQL 4.1.1 and therefore cannot be used in previous versions. Here is an example. First, do a simple
1. mysql query expansion technology tutorial
Introduction: Query expansion is used to try to broaden the scope of the full-text search results returned. Consider the following situation. You want to find all comments that mention anvils. Only one comment contains the word anvils , but you also want to find all other lines that may be relevant to your search, even if they don't contain anvils . This is also a task of query expansion. When using query expansion, MySQL scans the data and index twice to complete the search:
2. Share a technical tutorial on lazy loading of front-end images
Introduction: I originally planned to write a blog about the detailed technology of delayed loading of front-end images yesterday afternoon. Unexpectedly, there were some problems with the company's project in the afternoon, so I have been changing the code for debugging. I ran outside all day today. It was already evening when I came back. I just finished my meal and wanted to catch up...
3. [ASP.NET MVC Mavericks Road]05 - Using Ninject
Introduction: Your location: Homepage> Programming Language> ASP.NET Technical Tutorial [New Benefits] Collect excellent articles and give away IT books for free Please enter keywords to search [ASP.NET MVC Mavericks Road] 05 - Using Ninject litt_j 2014-12-23 2 View 0 Comments Public original text Report Add refinement Add to favorites [ASP.NET MVC Mavericks Road] 05 - Use Ninject in [ASP.NET MVC Mavericks Road] series At the end of the previous article (Dependency Injection (DI) and Ninject), it was mentioned that in ASP.NET MVC
4. "CURL Technical Knowledge Tutorial" Series of Technical Tutorials Compilation
Introduction:: This article mainly introduces the "CURL Technical Knowledge Tutorial" series of technical tutorials. Students who are interested in PHP tutorials can refer to it.
5. 20 Key Points of PHP Programming Efficiency--PHP Technology Tutorial Sharing
Introduction: PHP Programming Efficiency 20 key points--PHP technology tutorial sharing
6. PHP Development Search Engine Technology Tutorial
Introduction: PHP development search engine technology allows us to design and develop a powerful and efficient search engine and database by ourselves. I am afraid that it is impossible in terms of technology and funds in a short time. However, since Yahoo is using other people’s technology, then should we Can you also use other people’s ready-made search engine websites?
7. PHP Get Script Running Time
Introduction: Provide web developers with the most complete technical tutorial articles related to PHP development, with the mission of improving the programming level of PHP enthusiasts
8. PHP file operation class (create files and write) generate logs
Introduction: Provide the most complete PHP for web developers Develop relevant technical tutorial articles, with the mission of improving the programming level of PHP enthusiasts
9. One of the design patterns in php - the intermediary pattern
Introduction: Provide web developers with the most complete technical tutorial articles related to PHP development, with the mission of improving the programming level of PHP enthusiasts
##10. # Applications cited in ##php
Introduction: Provide web developers with the most complete technical tutorial articles related to PHP development, with the mission of improving the programming level of PHP enthusiasts[Related Q&A recommendations]:
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Explain JSON Web Tokens (JWT) and their use case in PHP APIs.
Apr 05, 2025 am 12:04 AM
JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,
What are Enumerations (Enums) in PHP 8.1?
Apr 03, 2025 am 12:05 AM
The enumeration function in PHP8.1 enhances the clarity and type safety of the code by defining named constants. 1) Enumerations can be integers, strings or objects, improving code readability and type safety. 2) Enumeration is based on class and supports object-oriented features such as traversal and reflection. 3) Enumeration can be used for comparison and assignment to ensure type safety. 4) Enumeration supports adding methods to implement complex logic. 5) Strict type checking and error handling can avoid common errors. 6) Enumeration reduces magic value and improves maintainability, but pay attention to performance optimization.
How does session hijacking work and how can you mitigate it in PHP?
Apr 06, 2025 am 12:02 AM
Session hijacking can be achieved through the following steps: 1. Obtain the session ID, 2. Use the session ID, 3. Keep the session active. The methods to prevent session hijacking in PHP include: 1. Use the session_regenerate_id() function to regenerate the session ID, 2. Store session data through the database, 3. Ensure that all session data is transmitted through HTTPS.
Describe the SOLID principles and how they apply to PHP development.
Apr 03, 2025 am 12:04 AM
The application of SOLID principle in PHP development includes: 1. Single responsibility principle (SRP): Each class is responsible for only one function. 2. Open and close principle (OCP): Changes are achieved through extension rather than modification. 3. Lisch's Substitution Principle (LSP): Subclasses can replace base classes without affecting program accuracy. 4. Interface isolation principle (ISP): Use fine-grained interfaces to avoid dependencies and unused methods. 5. Dependency inversion principle (DIP): High and low-level modules rely on abstraction and are implemented through dependency injection.
Explain late static binding in PHP (static::).
Apr 03, 2025 am 12:04 AM
Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.
What is REST API design principles?
Apr 04, 2025 am 12:01 AM
RESTAPI design principles include resource definition, URI design, HTTP method usage, status code usage, version control, and HATEOAS. 1. Resources should be represented by nouns and maintained at a hierarchy. 2. HTTP methods should conform to their semantics, such as GET is used to obtain resources. 3. The status code should be used correctly, such as 404 means that the resource does not exist. 4. Version control can be implemented through URI or header. 5. HATEOAS boots client operations through links in response.
How do you handle exceptions effectively in PHP (try, catch, finally, throw)?
Apr 05, 2025 am 12:03 AM
In PHP, exception handling is achieved through the try, catch, finally, and throw keywords. 1) The try block surrounds the code that may throw exceptions; 2) The catch block handles exceptions; 3) Finally block ensures that the code is always executed; 4) throw is used to manually throw exceptions. These mechanisms help improve the robustness and maintainability of your code.
What are anonymous classes in PHP and when might you use them?
Apr 04, 2025 am 12:02 AM
The main function of anonymous classes in PHP is to create one-time objects. 1. Anonymous classes allow classes without names to be directly defined in the code, which is suitable for temporary requirements. 2. They can inherit classes or implement interfaces to increase flexibility. 3. Pay attention to performance and code readability when using it, and avoid repeatedly defining the same anonymous classes.
