php中目录操作函数(删除,创建,判断)
本文章主要是介绍在php目录操作函数 is_dir,rd_dir,mkdir等常用的目录操作函数实例介绍。
本文章主要是介绍在php教程目录操作函数 is_dir,rd_dir,mkdir等常用的目录操作函数实例介绍。
*/
function dir_writeable($dir) //自定义函数扩展功能,建立可写的目录
{
if(!is_dir($dir)) //如果给定的参数不是目录
{
@mkdir($dir,0777); //创建目录
echo "目录".$dir."建立成功!";
}
}
dir_writeable("test"); //调用自定义函数,建立test目录
/*
执行本代码将会在当前目录建立名为:test的目录,同时将输出:
目录test建立成功
*/
$dir="test"; //定义目录
if(rmdir($dir)) //如果成功删除目录
{
echo "目录".$dir."被成功删除!"; //输出内容
}
else
{
echo "删除目录".$dir."时,出现错误!";
}
//
$path="test.txt"; //定义路径
echo $path; //输出处理前的
$realpath=realpath($path); //将指定绝对路径规范化输出
echo "
";
echo $realpath //输出处理后的结果
//看一完整理实例
function dir_writeable($dir) //建立自定义函数扩展功能
{
if(!is_dir($dir)) //如果给定参数不是目录
{
@mkdir($dir,0777); //创建目录
}
if(is_dir($dir))
{
if($fp=@fopen("$dir/test.txt",'w')) //以写方式打开指定路径下的文件,如果不存在就创建
{
@fclose($fp); //关闭文件句柄
@unlink("$dir/test.txt"); //删除文件
$writeable=1; //定义返回值为真
}
else
{
$writeable=0; //定义返回值为假
}
}
return $writeable; //返回值
} //自定义函数结束

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

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

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

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

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

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,

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

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.
