In PHP's MySQLi extension, mysqli_stmt::send_long_data is a function used to send large data (such as long text or large binary data) to a MySQL database. When handling large-scale data insertion, the standard bind_param() method may face data size limitations, making send_long_data() particularly useful. This article explains the basic usage of mysqli_stmt::send_long_data and important considerations when using it.

When working with JSON data in PHP, we often use json_decode() to convert JSON strings into PHP variables. This process is usually straightforward, but parsing errors can occur when dealing with nested or complex structures. In such cases, json_last_error() can be used to help identify and troubleshoot the issues.

A session is a method to store data between a user and a server. The session_start() function initiates a session. When a user logs in, PHP creates a session ID on the server and stores relevant data there, while the client stores the session ID via a cookie.

mysqli_stmt::$insert_id is a property provided by PHP's mysqli extension. After executing an INSERT statement, it returns the AUTO_INCREMENT value of the newly inserted record. This value is often used as the basis for generating unique identifiers. Note that $insert_id is only valid after executing an INSERT statement.

strrev() is a very convenient built-in function that can be used to reverse strings. With this function, we can quickly flip a string from end to start. This article will explain how to use the strrev() function in PHP to reverse strings, with examples demonstrating its usage.

This document serves as a learning and reference guide, introducing the basic usage of the curl_multi_add_handle function in PHP.

If an Iterator has been partially or fully traversed, calling iterator_count() on it will return the remaining number of elements or 0.

The disk_total_space() function can be used to retrieve the total size of a filesystem or disk partition. This function is particularly useful for server monitoring, disk space alerts, and similar tasks. However, in practice, some developers encounter issues where the code has no syntax errors, yet calling disk_total_space() returns nothing or even throws warnings such as “Permission denied” or similar permission-related errors.

Explore the advantages of Discuz 3.3 in PHP applications, sharing tips on database optimization, template customization, and plugin usage to help developers build efficient and engaging community platforms.

When working with PHP to handle images, imagesetinterpolation() is a crucial function that controls the interpolation algorithm used during image scaling. This function allows developers to specify which interpolation algorithm to use when resizing images, affecting both image quality and processing speed. Common interpolation methods include fast interpolation, bilinear interpolation, and high-quality interpolation. If imagesetinterpolation() fails to set correctly, it may result in poor image quality or blurriness. This article provides a series of troubleshooting steps and tips to help developers identify and resolve imagesetinterpolation() setup issues.

In PHP, converting string case is a common task. For handling multibyte character sets (such as Chinese, Japanese, Korean, etc.), PHP provides the mb_convert_case function to change string case. Unlike traditional strtoupper() and strtolower() functions, mb_convert_case supports multibyte encodings, making it better suited for strings that include non-Latin characters.

This article demonstrates how to combine atanh and acos in PHP for advanced mathematical applications, with unrelated code snippets added before and after the main content, separated by horizontal lines.

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In PHP development, checking whether a key exists in an array is a common task, and the key_exists() function is often the first choice for this job. It checks if a specified key exists in an array. However, if the array is undefined, using key_exists() carelessly can trigger unnecessary errors or warnings. Therefore, understanding how to prevent undefined array errors when using key_exists() is crucial.

When working with MySQL databases in PHP, mysql_fetch_array is a commonly used function for fetching rows from a query result set. However, when dealing with very large result sets, directly using mysql_fetch_array may cause performance bottlenecks, high memory consumption, and even slow page responses. This article, with concrete code examples, explains how to efficiently handle and optimize performance when returning large result sets.

In PHP’s runtime process, the php.ini configuration file plays a crucial role in adjusting environment settings and system behavior. In addition to the main php.ini file, PHP may also scan and load other configuration files, which could contain additional settings or be used by specific modules. For developers, it’s sometimes necessary to verify which configuration files have been loaded in the current PHP environment.

In PHP’s image processing library, imagecreatefrompng() and imagegetclip() are two powerful functions that can efficiently read, process, and optimize PNG images. Properly using these functions can help reduce memory usage and improve processing efficiency, especially when cropping and optimizing images. This article discusses how to use these two functions together to enhance image processing.