Avoid common mistakes in PHP language development

In the development of PHP language, it is very important to avoid common mistakes. Some simple mistakes in coding can delay time or cause the program to fail. Now, I will list some ways to avoid common mistakes in PHP development.

1. Comment out unused code

In the development process of a web application, we will write a lot of test code, which may not be used. . To avoid wasting time and resources, we should comment out unused code. This will not only reduce code redundancy, but also reduce confusion in program maintenance.

2. Avoid Duplicate Code

Duplicate code is a very common mistake, especially as programs become more and more complex. If an existing function needs to be used in different places, it should be defined in a separate function to avoid duplication of code. This will make the program easier to maintain and modify.

3. Verify the legality of form input

The legality verification of form input is a very important task in PHP development. This avoids errors your program encounters when processing user input. For example, we can check all fields entered before the form is submitted to ensure that they meet program requirements and have no potential security issues.

4. Accurate error message

During the PHP development process, when an error occurs, many developers like to turn off the error display function (display_errors). Doing this may increase the efficiency of program execution, but when an error occurs in the program, you will have no way to start. The correct approach should be to enable the error log and record the error information to a file.

5. Use functions with error handling functions

In PHP development, we will use many functions, which often need to return error information when an error occurs in the program. . If we write these error handling functions ourselves, we may waste a lot of time and effort. Now, many PHP frameworks and class libraries come with error handling functions, and we can use them directly to avoid the additional cost of error handling.

6. Tracking the code execution process

Tracking the code execution process is a commonly used method in PHP development. For example, using the xdebug debugging tool, you can insert breakpoints in PHP files to check the value and status of each variable during program execution. This feature can greatly reduce errors encountered during debugging and increase code quality and program efficiency.

7. Regularly update PHP version and library files

Regularly updating PHP version and library files can ensure the latest security and performance optimization. PHP is constantly evolving, and new versions and library files can bring more new features and optimizations. If we have a time-bound project that needs to consider security technologies and performance requirements, it is very important to keep the latest versions and library files.

Summary

In the development of PHP language, it is very critical to avoid common mistakes. This increases program efficiency, reliability, and ease of maintenance. Pay attention to the above methods during the development process to avoid making the same mistakes during code writing.

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