Backend Development
PHP Tutorial
How to get file attributes in PHP? Introduction to the method of getting file attributes in PHP (with code)
How to get file attributes in PHP? Introduction to the method of getting file attributes in PHP (with code)
PHP can use a variety of functions to obtain file attributes. Each function allows us to obtain various information about the file. Next, let's take a look at the different methods of obtaining file attributes in PHP.
PHP gets file attributes to get the latest modification time:
< ?php $file = 'test.txt'; echo date('r', filemtime($file)); ?>
The returned timestamp is the unix timestamp, which is commonly used in caching technology.
Related PHP gets file attributes There is the time fileatime() and filectime() are used to obtain the last accessed time. When the file's permissions, owner, all groups or other metadata in the inode are updated, the fileowner() function returns the file owner
$owner = posix_getpwuid(fileowner($file));
(Non-window system), ileperms() gets the permissions of the file,
< ?php $file = 'dirlist.php'; $perms = substr(sprintf('%o', fileperms($file)), -4); echo $perms; ?>
filesize() returns the number of bytes of the file size:
< ?php // 输出类似：somefile.txt: 1024 bytes $filename = 'somefile.txt'; echo $filename . ': ' . filesize($filename) . ' bytes'; ?>
PHP gets all the information about the file attributes and returns Array function stat() function:
< ?php $file = 'dirlist.php'; $perms = stat($file); var_dump($perms); ?>
Related recommendations:
PHP How to get the protected attribute
The above is the detailed content of How to get file attributes in PHP? Introduction to the method of getting file attributes in PHP (with code). For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1378
52
Alipay PHP SDK transfer error: How to solve the problem of 'Cannot declare class SignData'?
Apr 01, 2025 am 07:21 AM
Alipay PHP...
Explain JSON Web Tokens (JWT) and their use case in PHP APIs.
Apr 05, 2025 am 12:04 AM
JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,
Explain the concept of late static binding in PHP.
Mar 21, 2025 pm 01:33 PM
Article discusses late static binding (LSB) in PHP, introduced in PHP 5.3, allowing runtime resolution of static method calls for more flexible inheritance.Main issue: LSB vs. traditional polymorphism; LSB's practical applications and potential perfo
Framework Security Features: Protecting against vulnerabilities.
Mar 28, 2025 pm 05:11 PM
Article discusses essential security features in frameworks to protect against vulnerabilities, including input validation, authentication, and regular updates.
How to send a POST request containing JSON data using PHP's cURL library?
Apr 01, 2025 pm 03:12 PM
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�...
Describe the SOLID principles and how they apply to PHP development.
Apr 03, 2025 am 12:04 AM
The application of SOLID principle in PHP development includes: 1. Single responsibility principle (SRP): Each class is responsible for only one function. 2. Open and close principle (OCP): Changes are achieved through extension rather than modification. 3. Lisch's Substitution Principle (LSP): Subclasses can replace base classes without affecting program accuracy. 4. Interface isolation principle (ISP): Use fine-grained interfaces to avoid dependencies and unused methods. 5. Dependency inversion principle (DIP): High and low-level modules rely on abstraction and are implemented through dependency injection.
Customizing/Extending Frameworks: How to add custom functionality.
Mar 28, 2025 pm 05:12 PM
The article discusses adding custom functionality to frameworks, focusing on understanding architecture, identifying extension points, and best practices for integration and debugging.
How does session hijacking work and how can you mitigate it in PHP?
Apr 06, 2025 am 12:02 AM
Session hijacking can be achieved through the following steps: 1. Obtain the session ID, 2. Use the session ID, 3. Keep the session active. The methods to prevent session hijacking in PHP include: 1. Use the session_regenerate_id() function to regenerate the session ID, 2. Store session data through the database, 3. Ensure that all session data is transmitted through HTTPS.
