PHP操作文件的一些基本函数使用示例
这篇文章主要介绍了PHP操作文件的一些基本函数使用示例,本文给出了复制文件、删除文件、重命名文件、截取文件等操作代码实例,需要的朋友可以参考下
在对文件进行操作时,,不仅可以对文件中的数据进行操作,还可以对文件本身进行操作。例如复制文件、删除文件、截取文件及为文件重命名等操作。在PHP中已经提供了这些文件处理方式的标准函数,使用也非常容易,如下表所示:
在表中,四个函数如果执行成功,则都会返回TRUE,失败则返回FALSE。它们的使用代码如下所示:
复制代码 代码如下:
//复制文件示例
if(copy('./file1.txt','../data/file2.txt')){
echo "文件复制成功!";
}else{
echo "文件复制失败!";
}
//删除文件示例
$filename = "file.txt";
if (file_exists($filename)){
if (unlink($filename)){
echo "文件删除成功!";
}else{
echo "文件删除失败!";
}
}else{
echo "目标文件不存在";
}
//重命名文件示例
if (rename('./demo.php', './demo.html')){
echo "文件重命名成功!";
}else{
echo "文件重命名失败";
}
//截取文件示例
$fp = fopen('./data.txt', "r+") or die('文件打开失败');
if(ftruncate($fp, 1024)){
echo "文件截取成功!";
}else{
echo "文件截取失败!";
}
?>

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



PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati

Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c

If you are an experienced PHP developer, you might have the feeling that you’ve been there and done that already.You have developed a significant number of applications, debugged millions of lines of code, and tweaked a bunch of scripts to achieve op

This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an

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,

A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

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.
