Practical methods of PHP7 underlying development principles: the secret of optimizing PHP code performance

Practical method of underlying development principles of PHP7: the secret of optimizing PHP code performance

Introduction:
With the rapid development of the Internet, PHP as a popular Server-side scripting language, widely used in web development. However, as the scale of applications continues to expand, performance optimization of PHP code becomes particularly important. This article will introduce the practical methods of PHP7's underlying development principles and reveal the secrets of optimizing PHP code performance.

1. The necessity of understanding the underlying development principles of PHP7
PHP7 is the latest version of the PHP language. The underlying layer has been fully upgraded and optimized, which greatly improves the performance of PHP code. Understanding the underlying development principles of PHP7 will help us gain a deeper understanding of the PHP code execution process, so that we can optimize the code in a targeted manner.

2. Practical methods of underlying development principles

1. Use the latest version of PHP7
   First of all, we need to ensure that we are using the latest version of PHP7. Each new version fixes some performance issues in the previous version and introduces some new optimization measures. Therefore, updating the PHP version in time is the first step to optimize performance.
2. Reasonable use of PHP's built-in functions
   PHP provides a large number of built-in functions, such as string processing, array operations, file reading and writing, and other functions. These built-in functions have been optimized at the bottom level and have higher execution efficiency than custom functions. Therefore, when writing PHP code, using PHP's built-in functions as much as possible can significantly improve the performance of the code.
3. Use reference passing appropriately
   In PHP, variables are passed by value by default, that is, a copy of the variable is created when the function is called. Passing by reference can reduce unnecessary memory copy overhead and improve code execution speed. Therefore, proper use of passing by reference can optimize the performance of PHP code.
4. Use appropriate data types
   PHP supports multiple data types, such as strings, integers, floating point types, arrays, etc. Based on actual needs, choosing the appropriate data type can reduce memory usage and improve code execution efficiency. For example, when a large amount of integer data needs to be stored, using an integer array is more efficient than using an ordinary array.
5. Reasonable use of caching mechanisms
   PHP provides a variety of caching mechanisms, such as OPcache, APC, etc. These caching mechanisms can cache the compilation results of PHP code, avoid repeated code compilation and parsing, and improve the code execution speed. Reasonable use of the caching mechanism can effectively optimize the performance of PHP code.
6. Reduce the number of database accesses
   Database access is usually one of the performance bottlenecks in web applications. Therefore, reducing the number of database accesses can significantly improve code execution efficiency. When writing PHP code, you can reduce the number of database accesses by properly designing the database structure, using caching technology, and using batch processing.
7. Use appropriate algorithms and data structures
   When writing PHP code, choosing appropriate algorithms and data structures is an important part of optimizing performance. Reasonable selection of algorithms and data structures can reduce unnecessary calculation and memory overhead and improve code execution efficiency. Therefore, understanding commonly used algorithms and data structures and choosing to use them appropriately is crucial to optimizing PHP code performance.

Conclusion:
By understanding the underlying development principles of PHP7 and using practical methods for optimization, the performance of PHP code can be improved. Reasonable use of PHP's built-in functions, reference passing, appropriate data types, and caching mechanisms, reducing the number of database accesses, and using appropriate algorithms and data structures are all the secrets to optimizing PHP code performance. Through continuous practice and experience summarization, we can further improve the performance of PHP code and provide users with smoother and more efficient web application services.

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