What knowledge do you need to ask in a PHP interview?

php interviews require questions about basic knowledge of PHP, variables and data types, arrays and collections, file processing and IO operations, database operations, object-oriented programming, Web development, security knowledge, etc. A reasonable interview should give the candidate sufficient time to answer questions and provide necessary tips and guidance to ensure the accuracy of the assessment. The interviewer can also consider the candidate's problem-solving ability, learning ability, teamwork ability, etc. .

The operating environment of this tutorial: windows10 system, php8.1.3 version, DELL G3 computer.

PHP, as a popular programming language, is widely used in the field of software development. When recruiting PHP developers, it is essential to conduct a detailed interview to ensure that the candidate has sufficient knowledge and skills to cope with the job requirements. Here are some questions you can ask to assess a candidate's PHP knowledge.

1. Basic knowledge:

-What is PHP? How does it work?

-What are the common data types in PHP?

- What flow control statements does PHP have?

- How are PHP functions defined and called?

- What is SQL injection? How to prevent it?

- What are the advantages and disadvantages of PHP?

2. Variables and data types:

- How to declare and use variables?

- What data types does PHP support? What are their differences?

- How to pass a variable to a function and return the result?

- What is string interpolation? How to implement it in PHP?

- How to compare the value and type of two variables in PHP?

3. Arrays and Collections:

- How to create and manipulate arrays?

- What are the commonly used array functions in PHP?

- How to traverse an array and access its values?

- What are associative arrays? How to use them?

- How to use PHP’s built-in collection class?

4. File processing and IO operations:

- How to open and close files?

- How to read and write files?

- What functions does PHP have for file processing?

- How to handle file uploads?

- How to handle directories and files Operation?

5. Database operation:

-How to connect to the database?

-What are the commonly used database extensions for PHP?

- How to perform SQL queries and update operations?

- How to handle database transactions and exceptions?

- How to use prepared statements and parameter binding to prevent SQL injection?

6. Object-oriented programming:

- What is object-oriented programming? Why use it?

- How to define classes and create objects?

- What are the object-oriented features of PHP?

- What are inheritance and polymorphism? How to implement them in PHP?

- How to use namespace and autoloading mechanism?

7. Web Development:

- What is HTTP? What is the life cycle of an HTTP request?

- How does PHP handle HTTP requests and responses?

- How to get web form data in PHP?

- What are sessions and cookies? How to implement them in PHP?

- How to handle errors and exceptions?

8. Security:

- What is Cross-site Scripting (XSS)? How to prevent it?

- What is Cross-Site Request Forgery (CSRF) attack? How to prevent it?

- How to protect user passwords and sensitive data?

- What are password hashing and encryption? How to implement them in PHP?

- How to use HTTPS to protect data transmission?

During the interview process, in addition to asking the above knowledge points, candidates can also be asked to complete some coding tests to evaluate their practical application capabilities. In addition, a reasonable interview should give candidates sufficient time to answer questions and provide necessary tips and guidance to ensure the accuracy of the assessment. Finally, the interviewer can also consider the candidate's problem-solving ability, learning ability, and teamwork ability. .

The above is the detailed content of What knowledge do you need to ask in a PHP interview?. For more information, please follow other related articles on the PHP Chinese website!