What you need to know for interviewing PHP

You need to know for the PHP interview: 1. Basic knowledge of PHP; 2. PHP object-oriented programming; 3. Web development of PHP; 4. Database and SQL; 5. PHP framework; 6. Front-end development and related technologies; 7. Security and performance optimization; 8. Version control and collaboration tools.

The operating environment of this tutorial: Windows 10 system, PHP8.1.3 version, Dell G3 computer.

PHP is a widely used server-side scripting language mainly used for developing dynamic web pages and web applications. When interviewing for a PHP development position, the interviewer usually examines the candidate's knowledge of the PHP language and related technologies. Here are some common interview questions and knowledge points to help you prepare for the interview.

1. Basic knowledge of PHP

-The origin, development and characteristics of PHP

-PHP data types, variables and constants

- PHP operators and control structures

- PHP functions and object-oriented programming

2. PHP object-oriented programming

- Classes , objects and instantiation

-Inheritance, encapsulation, polymorphism

-Interfaces and abstract classes

-Namespace

3. PHP Web Development

- HTTP Protocols and Status Codes

- Hyperlinks and Forms

- Cookies and Session

- GET and POST Requests

- File upload and download

4. Database and SQL

- Basic usage and query statements of MySQL

- Database Connection and operation

- Database addition, deletion, modification and query

- Database transaction and index

- Understanding of NoSQL database

5. PHP framework

- Characteristics and usage of common PHP frameworks such as Laravel, Symfony, CodeIgniter

- Concept and implementation of MVC pattern

- Routing and controller

- Database ORM operations

- Framework related extensions and plug-ins

6. Front-end development and related technologies

- HTML, CSS and Basic knowledge of JavaScript

- AJAX and asynchronous requests

- Understanding of front-end frameworks (such as React, Vue, Angular)

- Responsive design and mobile development

7. Security and performance optimization

- Prevent SQL injection and cross-site scripting attacks (XSS)

- HTTPS and encryption technology

- Caching and CDN

- Performance optimization and code optimization skills

8. Version control and collaboration tools

- Basic use and common use of Git Command

- Branch management and merging

- Understanding of Git workflow

- Use of team collaboration tools (such as Jira, Slack)

In interviews , a candidate's skills are typically assessed using a combination of practical questions and coding tests. In addition to mastering the above knowledge, you also need to accumulate experience in daily programming practice, be familiar with common coding standards, debugging and error handling skills, and have the ability to learn and apply new technologies.

The most important thing is that the interview is a process of mutual understanding. It not only allows the interviewer to understand your abilities, but also an opportunity for you to understand the company and the team. Prepare actively, respond confidently, and show your strength and potential. I wish you a successful interview!

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