PHP sessions store user data on the server side using a unique session ID. Each time a user makes a request, PHP looks up this session ID and loads the corresponding session data, which is typically accessed via the $_SESSION superglobal.

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unset() is a commonly used function to destroy variables or elements within an array. When dealing with superglobal arrays like $_POST, $_GET, $_SESSION, etc., you may need to remove a specific variable from these arrays. This article explains in detail how to use unset() to remove variables from superglobals and highlights important considerations when using it.

PHP sessions store user data on the server using a unique session ID. Each time a user makes a request, PHP looks up the session ID and loads the corresponding session data. This data is typically accessed and modified via the $_SESSION superglobal.

In daily web development, managing server storage space is a crucial task. PHP provides a very handy function, disk_free_space(), which helps us quickly check the available disk space on the server. This article explains how to use this function to retrieve disk free space and how to apply it in real-world projects.

This article demonstrates how to use PHP’s getdate() function to retrieve detailed date and time information, display the current timezone, and format the date into a readable string including the timezone.

In PHP, the socket_wsaprotocol_info_import function is used to import Windows Sockets protocol information and is commonly applied in network programming, especially when working with sockets on Windows. However, developers may encounter several common errors when using this function. Understanding the causes of these errors and their solutions can help developers work more efficiently in network programming and troubleshooting.

Monitoring the execution status of SQL queries is crucial for debugging and optimizing PHP applications. This article explains how to use the mysqli::$info function to track SQL execution in real time, providing detailed insights into affected rows, warnings, and other query information.

The date_add() function is used to add a time interval to a DateTime object. It accepts two parameters: a DateTime object and a DateInterval object representing the time interval, which can include combinations of years, months, days, hours, minutes, and other units.

Sure! I will write a PHP article according to your requirements. The introduction and conclusion will include content unrelated to the main text, separated by horizontal rules. The article focuses on the compatibility issues of the ftp_get_option function across different PHP versions.

Sure, I will write a PHP article according to your requirements, including unrelated content at the beginning and end, separated from the main content by horizontal lines. The article will focus on the compatibility issues of the ftp_get_option function across different PHP versions.

When working with XML files, especially when parsing them with PHP, improper error handling can affect program stability and user experience. By default, PHP generates error messages and may halt execution if the XML file is malformed. To prevent this, the libxml_use_internal_errors function provides a more elegant way to handle errors, allowing developers to capture and manage errors during parsing without impacting other parts of the application.

array_key_exists($key, $array) is used to check whether a specified $key exists in the $array. If the $key exists, it returns true; otherwise, it returns false.

In PHP, the bin2hex() function is used to convert binary data into its hexadecimal representation. This article discusses what happens when an empty string is passed to the bin2hex() function.

The basic usage of the wordwrap function is to wrap a block of text at a specified length. Its function prototype is as follows: