Found a total of 10000 related content
Exploring Java Reflection API Capabilities
Article Introduction：The Java reflection API is a tool for dynamically obtaining class information and operating class members when a program runs. The core answer is: it allows the runtime to load classes, access private members, create instances and call methods. 1. The class can be loaded dynamically through Class.forName(); 2. Use getDeclaredConstructor().newInstance() or setAccessible(true); 3. Call methods through getMethod() and invoke(); 4. Support obtaining structural information such as methods, fields, constructors of the class; 5. You can access private members but use them with caution; 6. Pay attention to performance overhead, security restrictions, and encapsulation corruption when using them
2025-07-04
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888
How do I Calculate Age from Date of Birth in PHP and MySQL?
Article Introduction：This article discusses two methods for determining the age of an individual based on their date of birth using PHP and MySQL. The PHP method employs the DateTime class to compute the age difference. The MySQL method utilizes the TIMESTAMPDIFF() funct
2024-10-24
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372
Fun with Array Interfaces
Article Introduction：Key Points
PHP's array interface allows programmers to simulate the characteristics of native data types in custom classes, similar to Python's methods. This enables custom classes to work like arrays and allows common array operations such as counting elements, looping through elements, and accessing elements through indexes.
An interface is like a contract for a class, specifying the methods that a class must contain. They allow encapsulation of implementation details and provide syntax sugar, thereby improving the readability and maintainability of the code. PHP provides a library of predefined interfaces that can implement these interfaces to make objects similar to arrays.
Countable, ArrayAccess and Iterator interfaces in PHP allow objects to pass cou respectively
2025-02-22
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497
php add hours to datetime
Article Introduction：In PHP, you can add hours to date and time by using the DateTime class with the modify() or add() method. Use the modify() method to pass in string parameters similar to '3hours' to directly modify the original object, which is suitable for simple adjustment; if you do not want to change the original object, you need to clone it before operating; use the add() method, you need to cooperate with the DateInterval object, such as 'PT2H', which means adding two hours, which is more suitable for structured development; when processing time zones, DateTimeZone should be set to ensure accuracy; for old versions of PHP, you can use strtotime() to implement it, but it is not recommended for complex logic. Choosing the right method to keep the code clear is key.
2025-07-08
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637
PHP environment setup: Manual installation vs. integrated tools
Article Introduction：Newbie people are suitable for using integrated tools. Developers who have customization needs or want to have a deep understanding of the operating mechanism are more suitable for manual installation. Integrated tools (such as XAMPP, WAMP, MAMP or Laragon) package Apache, MySQL, PHP and other components, which are simple to install, convenient to start and stop services, and have adjusted the environment configuration, which is suitable for quick start and save time; while manual installation is suitable for situations where specific versions are required, expansion modules are enabled or customized configurations are enabled. Although there are many steps, you can fully control the details. The choice method must consider the purpose (learning basic development or project customization), the operating system (Laragon or XAMPP recommended by Windows, MAMP or Homebrew can be selected by Mac), and technical capabilities (if you are not familiar with the command line, you will first
2025-06-29
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248
How to configure the PHP runtime environment?
Article Introduction：The key to configuring the PHP operating environment is to select the appropriate version, match the web server and set the environment variables correctly. 1. Install PHP to select a stable version such as 8.1 or 8.2, and install common extensions such as php-mysql, php-curl, php-gd. Windows users need to manually modify the php.ini file to enable the extension, and Linux users generally enable it automatically; 2. Apache or Nginx can be selected with a web server. Apache needs to load the PHP module in the configuration file and specify PHPIniDir. Nginx uses PHP-FPM through FastCGI. Pay attention to the root and index.php settings. XAMP is available for local testing.
2025-06-29
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348
php best way to store date in database
Article Introduction：The safest way to save dates to the database in PHP is: 1. Select the appropriate data type (DATETIME is suitable for long-term storage, TIMESTAMP is suitable for automatic time zone conversion); 2. Use the DateTime class to process time and the unified format is 'Y-m-dH:i:s'; 3. Use UTC in the unified time zone and set the time zone when connecting to MySQL. Avoid storing timestamps directly or using irregular formats to ensure queries, sorting, and cross-language compatibility.
2025-07-12
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260
Dave The Diver: How To Catch Spider Crabs
Article Introduction：In Dave The Diver, there are some creatures that are not easy to catch. Or, catch alive that is. The spider crab is one of those very species, making it seem like the only way to bring these crustaceans back up to land is to viciously crack them up w
2025-01-10
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777
Prepare for Interview Like a Pro with Interview Questions CLI
Article Introduction：Prepare for Interview Like a Pro with Interview Questions CLI
What is the Interview Questions CLI?
The Interview Questions CLI is a command-line tool designed for JavaScript learners and developers who want to enhance their interview
2025-01-10
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1408
Soft Deletes in Databases: To Use or Not to Use?
Article Introduction：Soft Deletes: A Question of DesignThe topic of soft deletes, a mechanism that "flags" records as deleted instead of physically removing them, has...
2025-01-10
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