Found a total of 10000 related content
Python Cryptography Library Usage
Article Introduction：The Python encryption library is used as follows: 1. Symmetric encryption is recommended to use the Fernet module in the cryptography library. The key is generated by generate_key() and the data is encrypted and decrypted with encrypt()/decrypt(); 2. The hashlib library can be used to calculate hashlib, and the SHA256 algorithm is preferred and the hash value is obtained through hexdigest(). Pay attention to avoiding MD5 and SHA1; 3. Asymmetric encryption can use the RSA function of cryptography to generate key pairs through generate_private_key(), and use public key encryption and private key decryption. Note that filling schemes such as OAEP must be used and only suitable
2025-07-17
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546
PHP NumberFormatter: Solve the problem of comparing strings after currency formatting
Article Introduction：This article aims to solve the problem that string comparison fails due to format differences after using the PHP NumberFormatter class for currency formatting. By analyzing potential factors such as spaces, debugging methods and solutions are provided to ensure the accuracy of currency formatted string comparisons.
2025-08-22
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667
How to get datetime aggregated data by user time zone in MySQL and PHP
Article Introduction：This article elaborates on strategies for handling multi-time zone date-time aggregation in MySQL databases and PHP applications. By explaining MySQL's CONVERT_TZ function and its dependence on time zone system tables, as well as the powerful time zone conversion capabilities provided by the PHP DateTime class, this tutorial aims to guide developers how to accurately filter, group and aggregate data based on the user-specified time zone, thereby avoiding calculation errors caused by time zone differences.
2025-08-24
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652
PHP Tutorial: Use nested loops to find primes efficiently
Article Introduction：This article explores in-depth common problems and solutions for finding prime numbers using nested loops in PHP. By analyzing the Boolean status flag not reset errors that beginners often make, two optimization methods are provided: one is to correctly reset the status flag, and the other is to use counters and break statements to improve efficiency. The tutorial contains detailed code examples and analysis, aiming to help readers master the PHP prime detection algorithm and understand the key details in loop logic.
2025-09-02
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571
Detailed explanation of the problem of strtotime() returning 1970 date and date comparison
Article Introduction：This article aims to solve the problem of returning a date in 1970 when converting a date string to a timestamp in PHP, and the resulting date comparison error. By analyzing the cause of the problem in detail and combining the createFromFormat method of the DateTime class, a more accurate and reliable date conversion and comparison solution is provided to help developers avoid similar errors and ensure the correctness and stability of the code.
2025-08-23
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473
How does Laravel's service container use reflection for auto-wiring?
Article Introduction：Laravel's container uses the PHP reflection API to automatically parse class dependencies to achieve automatic assembly; 1. When requesting to parse a class, if the constructor parameter has a type prompt and can be parsed, it can be instantiated without explicit binding; 2. The container obtains constructor parameters through ReflectionClass, uses ReflectionParameter to read the type prompt and recursively parse each dependency; 3. Reliability is recursively parsed according to the graph, such as the OrderController relies on the OrderService, which relies on the OrderRepository, and finally builds layer by layer from the bottom layer; 4. If the parameter has no type prompt, is a basic type or has no binding to the interface, an exception is thrown unless provided
2025-07-25
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838
PHP Master | Logging with PSR-3 to Improve Reusability
Article Introduction：Core points
PSR-3, a common log object interface, allows developers to write reusable code without relying on any specific log implementation, thereby improving compatibility between different log libraries in PHP.
The PSR-3 interface provides eight methods to handle messages of different severity levels, and a common log() method that can receive any severity levels. Its design is to solve the problem of log implementation incompatibility.
Although PSR-3 has many benefits, some log libraries do not support it natively. However, developers can create PSR-3 compliant adapters by leveraging the adapter pattern and extending the AbstractLogger class provided in the Psr/Log library.
Many major PHP projects
2025-02-24
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1305
What are Weak Maps in PHP?
Article Introduction：PHP does not have a built-in WeakMap type, but similar functions can be implemented through the WeakMap class provided by the WeakrefPECL extension. The key feature of WeakMap is that its keys are stored in a weak reference manner, avoiding preventing garbage collection and thus preventing memory leaks. When using it, you must first install and enable the Weakref extension. After creating a WeakMap instance, the object is stored as a key, and it will be automatically cleaned when there are no other references to the object. Applicable scenarios include: 1. Cache object-related data; 2. Add metadata to the object; 3. Avoid memory leaks in the event system. Notes include: 1. WeakMap is not a PHP core function; 2. The key must be an object; 3. The entry clearing time is uncontrollable. If the deployment environment allows,
2025-06-27
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385
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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928
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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1547
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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