The str_split() function is a commonly used string processing function that splits a string into an array, each array element being part of the string. Foreach loops are often a good choice when we want to process every character of a string, especially when paired with str_split.

When using PHP to operate a database, especially in scripts that export data, it is important to understand and obtain relevant properties of database connections. mysqli_stmt::attr_get is a method provided in the mysqli extension for preprocessing statement objects to obtain certain statements or connection-related properties. This article will explain in detail how to obtain database connection attributes in the data export script in combination with the mysqli_stmt::attr_get function, to help you process database data more efficiently and safely.

The GD library is one of the most commonly used tools when using PHP for image processing. This library provides a complete set of functional interfaces for dynamically generating and editing images. A common visual optimization requirement during drawing is anti-aliasing. To this end, the imageantialias() function came into being, which significantly improves the smoothness of the image, especially when drawing curves and diagonals. However, many developers will encounter a confusing problem: even if imageantialias() is called, the image still looks obvious jagged. The reason is often the case.

Using Memcached as session preservation is a common practice and can improve session processing efficiency and stability in distributed environments. To ensure that session data can be correctly written to the cache after script execution, the session_register_shutdown() function plays a key role. This article will introduce in detail how to use this function correctly and what to note during use.

When building web applications, processing user input is an important task, especially filtering sensitive words. PHP provides some multi-byte string functions, where mb_eregi_replace is a powerful tool suitable for case-insensitive replacement of strings in multi-lingual environments. This article will explain how to use mb_eregi_replace to replace sensitive words in text.

When using PHP for multibyte string processing, the mb_eregi_replace function is a very practical tool that supports regular replacement of multibyte characters and ignores case. However, many developers often encounter garbled code problems when using this function. This article will analyze the causes of garbled code in depth and focus on how to correctly set internal character encoding to avoid garbled code.

This article explains the PHP basename() function in detail, demonstrating how to use it to extract the filename from a file path. With several code examples, readers can quickly understand how to use the basename() function and apply it in real-world programming scenarios. This function is highly useful in file operations, file uploads, and URL processing.

This article introduces how to use PHP and Swoole to achieve efficient real-time data synchronization and update. Through the WebSocket protocol and front-end JavaScript code, multiple users can send and receive data in real time. The article provides a complete code example and explains how to build a simple WebSocket chat room to improve PHP concurrency performance and real-time communication capabilities.

This article introduces how to use PHP and Swoole to build a high-performance network security protection system. We will discuss how to configure the Swoole extension, set up a TCP server, implement IP whitelist filtering, log recording, and more, to optimize network communication and enhance security, providing stronger protection for your website.

HTTP request hijacking is a common network attack method, where attackers manipulate data packets or use man-in-the-middle attacks to steal sensitive information. This article will explain how to use PHP data filtering functions, such as escaping special characters, verifying request sources, and encrypting data, to effectively prevent HTTP request hijacking and ensure user data security.

This article explains how to use PHP and the GMP library to perform big number subtraction. By installing the GMP extension, initializing big numbers, and using the gmp_sub() function, you can avoid overflow and precision loss, making it easy to perform big number subtraction. The article provides detailed code examples to help developers handle arbitrary large numbers accurately.

This article provides a detailed guide on how to implement user authentication and authorization with PHP functions to enhance the security of your web application. Through password hashing functions and database queries, it shows how to verify user identity, assign user roles, and restrict access based on roles. Whether using pure PHP code or integrating frameworks and libraries, this article provides practical examples suited for various development needs.

0

This article provides a detailed explanation of how to use PHP's "strtotime" function to parse English text date and time into UNIX timestamps. With example code, you will learn how to handle various date formats and relative time expressions, improving your ability to handle time data in web development.

This article introduces how to use PHP to develop a rating and review management system for an e-commerce platform. With example code, it explains how to design the database, display rating and review information on the front-end, and handle user-submitted ratings and reviews.

This article introduces how to use PHP for text classification and natural language processing, helping developers efficiently handle text data in practical applications. By using PHP's TextClassifier and Symmetrica libraries, it provides detailed code examples, enabling readers to master basic text classification and NLP techniques and apply them in real-world projects.

0

This article explains how to handle JSON format date and time data in PHP and MySQL. Using PHP's <code data-start="305" data-end="320">json_encode()</code> and <code data-start="325" data-end="340">json_decode()</code> functions, developers can easily convert date and time data to JSON format and process it. Additionally, we will explore methods of handling JSON data in MySQL, particularly how to extract and store date-time data.

When dealing with PHP arrays, array_flip() is a seemingly simple but hidden risk function. Its purpose is, but when you use it directly to user-provided data, it can trigger a series of problems you haven't expected.

During the development process, we often encounter online bugs caused by improper use of certain functions. Today, I will share with a real case how to discover and solve an online problem caused by the array_flip() function.