[Compilation and sharing] Common problems and solutions in the PHP written test

PHP is one of the most widely used open source scripting languages. Many websites and applications are developed and maintained using the PHP programming language. Therefore, in recruitment interviews, mastery of the basics of PHP is also valued by many companies. And if you fail to pass the PHP written test, it may greatly affect your job opportunities. This article will discuss common problems in the PHP written test and how to solve them.

1. Language Basics

In the PHP written test, mastering basic grammar is very important. Common questions include: data types, functions, arrays, etc. Data types include strings, integers, floating point numbers, and Boolean types, which can be assigned directly through assignment operators; functions are used to encapsulate a collection of codes with specific functions and can be reused; and arrays are used to store multiple values. The container can be accessed through the index.

Solution: It is recommended to read more basic textbooks related to PHP and practice more. You can try to install the PHP environment locally and manually simulate some basic syntax operations to deepen your understanding. You can also practice on online coding platforms.

2. Object-oriented programming

Object-oriented programming is one of the important programming paradigms of PHP, and it is developing towards more object-oriented. In the written exam, common questions include: class definition, inheritance, interfaces and namespaces, etc.

Solution: Learn the ideas and concepts of object-oriented programming and establish a correct understanding of class definition and inheritance. At the same time, accumulate more practical experience and improve your programming level by writing various practical applications.

3. Database operation

PHP’s database operation is an indispensable part of web development. In the written test, common questions include: connecting to the database, executing SQL statements and obtaining data, etc.

Solution: You need to master the basic operations of the MySQL database, learn to connect to the database, execute SQL statements, and call query results in PHP. Practice more through actual projects to improve your abilities.

4. Security mechanism

Due to the harsh network environment and hacker attacks, the security mechanism is a very important part of PHP development. In the written exam, common problems include: cross-site scripting attacks (XSS attacks) and SQL injection.

Solution: Learn Web security knowledge and related security programming skills, and actively apply them in actual development to ensure program security.

Summary:

The basic knowledge of the PHP written test is particularly important. At the same time, other aspects of knowledge such as object-oriented programming, database operations, and security also need to be involved to a certain extent. It is recommended that you read more, practice more, and constantly improve your abilities and levels, so that you can fully demonstrate your skills and advantages and win more career opportunities.

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