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- What are PHP magic methods (__construct, __destruct, __call, __get, __set, etc.) and provide use cases?
- What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.
- PHP Tutorial . Backend Development 671 2025-04-03 00:03:31
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- Explain covariance and contravariance in PHP method parameters and return types.
- PHP supports covariance and inversion since version 7.4. 1. Covariance allows subclass methods to return more specific types, such as the parent class returns Animal, and the subclass can return Dog. 2. Inverting allows subclass methods to accept wider parameter types, such as the parent class accepts Dog, and the subclass can accept Animal.
- PHP Tutorial . Backend Development 961 2025-04-02 18:17:10
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- Explain how garbage collection works in PHP, including reference counting.
- PHP uses reference counting and periodic collector for garbage collection. 1) Reference counting manages memory by tracking the number of references of the object, and frees memory when the count is zero. 2) The periodic recycler processes circular references, detects and releases objects that are no longer referenced externally.
- PHP Tutorial . Backend Development 1101 2025-04-02 17:57:11
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- What is serialization in PHP and what are potential security risks?
- Serialization in PHP is a process of converting objects or data structures into strings, which are mainly implemented through serialize() and unserialize() functions. Serialization is used to save object state for delivery between different requests or systems. Potential security risks include object injection attacks and information leakage. Avoiding methods include: 1. Limit deserialized classes and use the second parameter of the unserialize() function; 2. Verify the data source to ensure it comes from a trusted source; 3. Consider using more secure data formats such as JSON.
- PHP Tutorial . Backend Development 1184 2025-04-02 17:45:11
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- Explain the difference between $_SESSION, $_COOKIE, and browser Local Storage.
- There are three common client data storage methods in modern web development: 1.$\_SESSION: used to store data on the server side, which is highly secure, but may affect server performance. 2.$\_COOKIE: Stored on the client, reducing the burden on the server, but has low security and size limitations. 3. LocalStorage: allows storage of large amounts of data in the browser, which does not affect server performance, but data is stored plaintext and has low security.
- PHP Tutorial . Backend Development 688 2025-04-02 17:37:10
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- How to make PHP5.6 and PHP7 coexist through Nginx configuration on the same server?
- Running multiple PHP versions simultaneously in the same system is a common requirement, especially when different projects depend on different versions of PHP. How to be on the same...
- PHP Tutorial . Backend Development 518 2025-04-01 15:15:01
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- How to send a POST request containing JSON data using PHP's cURL library?
- Sending JSON data using PHP's cURL library In PHP development, it is often necessary to interact with external APIs. One of the common ways is to use cURL library to send POST?...
- PHP Tutorial . Backend Development 1472 2025-04-01 15:12:02
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- What exactly is the non-blocking feature of ReactPHP? How to handle its blocking I/O operations?
- An official introduction to the non-blocking feature of ReactPHP in-depth interpretation of ReactPHP's non-blocking feature has aroused many developers' questions: "ReactPHPisnon-blockingbydefault...
- PHP Tutorial . Backend Development 685 2025-04-01 15:09:01
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- Why does an error occur when installing an extension using PECL in a Docker environment? How to solve it?
- Causes and solutions for errors when using PECL to install extensions in Docker environment When using Docker environment, we often encounter some headaches...
- PHP Tutorial . Backend Development 1048 2025-04-01 15:06:01
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- The page is blank after PHP is connected to MySQL. What is the reason for the invalid die() function?
- The page is blank after PHP connects to MySQL, and the reason why die() function fails. When learning the connection between PHP and MySQL database, you often encounter some confusing things...
- PHP Tutorial . Backend Development 893 2025-04-01 15:03:01
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- WordPress site file access is restricted: Why is my .txt file not accessible through domain name?
- Wordpress site file access is restricted: troubleshooting the reason why .txt file cannot be accessed recently. Some users encountered a problem when configuring the mini program business domain name: ?...
- PHP Tutorial . Backend Development 997 2025-04-01 15:00:03
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- How to debug CLI mode in PHPStorm?
- How to debug CLI mode in PHPStorm? When developing with PHPStorm, sometimes we need to debug PHP in command line interface (CLI) mode...
- PHP Tutorial . Backend Development 877 2025-04-01 14:57:01
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- How to query the sum of two columns of data at the same time in ThinkPHP6?
- ThinkPHP6 database query: How to use TP6 to implement SQL statements SELECTSUM(jin), SUM(chu)FROMsysdbuil In ThinkPHP6 framework, how to use SQL statement SELECT...
- PHP Tutorial . Backend Development 327 2025-04-01 14:54:01
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- ThinkPHP6 routing: How to completely obtain URL parameters containing special characters such as Chinese?
- ThinkPHP6 routing parameters are processed in Chinese and complete acquisition. In the ThinkPHP6 framework, URL parameters containing special characters (such as Chinese and punctuation marks) are often processed...
- PHP Tutorial . Backend Development 955 2025-04-01 14:51:01
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