Home Backend Development PHP Problem PHP file operation to extract the name of the file/directory

PHP file operation to extract the name of the file/directory

Aug 20, 2021 pm 04:25 PM
php file name File operations

In the previous article "php file operation returns the location information of the file (absolute address)", we learned about 4 methods to obtain the path of the current file. This time we continue the PHP file operation series and talk about how to get the specified path or the file name (directory name) of the current file. Interested friends can learn about it~

The main content of this article is: "Get the name part of a file/directory". It can return the file name of the current file, or it can return the file name of the specified file URL.

1: Get the name part of the file

1. Use predefined variables $_SERVER -- The file name of the current file

In the above, we introduced that $_SERVER is an array containing server and execution environment information, one of which is "path".

We can use $_SERVER['PHP_SELF'] to get the file name of the currently executing script, but there will be a slash "/" before the file name

<?php
header("content-type:text/html;charset=utf-8");
echo "当前文件的文件名: ".$_SERVER[&#39;PHP_SELF&#39;];
?>
Copy after login

The output result is:

当前文件的文件名: /demo.php
Copy after login

This effect can also be achieved by using $_SERVER['SCRIPT_NAME']

echo "当前文件的文件名: ".$_SERVER[&#39;SCRIPT_NAME&#39;];
Copy after login

The output result is the same as above.

2. Use the basename() function - specify the file name of the file URL

<?php
header("content-type:text/html;charset=utf-8");
$path = "C:/wamp/www/demo.php";
echo &#39;指定路径$path的文件名称: &#39;.basename($path);
?>
Copy after login

The output result is:

指定路径$path的文件名称: demo.php
Copy after login

OK, This is the file name we want. The file name obtained above using the predefined variable $_SERVER can also be processed using the basename() function

<?php
header("content-type:text/html;charset=utf-8");
echo "当前文件的文件名: ".basename($_SERVER[&#39;PHP_SELF&#39;]);
?>
Copy after login

The output result is:

当前文件的文件名: demo.php
Copy after login

3. Use the pathinfo() function-- Specify the file name of the file URL

pathinfo() function can return information about the file path in the form of an array. Each array element and the information it contains are as follows:

  • [dirname]: Directory path

  • [basename]: File name

  • [extension]: File suffix name

  • [filename]: File name without suffix

<?php
$path = "C:/wamp/www/demo.php";
$arr = pathinfo($path);
var_dump($arr);
?>
Copy after login

The output result is:

PHP file operation to extract the name of the file/directory

##We can use

$arr['basename'] to get the file name. If you want to get For file names that include a suffix, $arr['filename'] can be used.

echo "文件名:".$arr[&#39;basename&#39;];
echo "<br>不包含后缀的文件名:".$arr[&#39;filename&#39;];
Copy after login

The output result is:

PHP file operation to extract the name of the file/directory

Use

$arr['extension']You can also get the file extension

echo "文件扩展名:".$arr[&#39;extension&#39;];
Copy after login

PHP file operation to extract the name of the file/directory

2: Get the name part of the directory

##1. Use magic constants

__DIR__ ---- The name part of the directory where the current file is located. __DIR__ constant can get the absolute path of the current file (excluding the file name), that is, the name part of the directory where the current file is located.

The example PHP file name containing the following program is demo.php, and the full path is "

C:/wamp/www/demo.php

"

<?php
header("content-type:text/html;charset=utf-8");
echo "当前文件的目录名: ".__DIR__;
?>
Copy after login

The output result is:

当前文件的目录名: C:\wamp\www
Copy after login

2. Use the dirname() function--specify the directory name of the file URL

dirname($path)

function Can return the directory name part of the path $path. <div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>&lt;?php header(&quot;content-type:text/html;charset=utf-8&quot;); $path = &quot;C:/wamp/www/demo.php&quot;; echo &amp;#39;指定路径$path的目录名称: &amp;#39;.dirname($path); ?&gt;</pre><div class="contentsignin">Copy after login</div></div>The output result is:

指定路径$path的目录名称: C:/wamp/www
Copy after login

Okay, that’s all. If you want to know anything else, you can click this. → →

php video tutorial

The above is the detailed content of PHP file operation to extract the name of the file/directory. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

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

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian Dec 24, 2024 pm 04:42 PM

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

7 PHP Functions I Regret I Didn't Know Before 7 PHP Functions I Regret I Didn't Know Before Nov 13, 2024 am 09:42 AM

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

How To Set Up Visual Studio Code (VS Code) for PHP Development How To Set Up Visual Studio Code (VS Code) for PHP Development Dec 20, 2024 am 11:31 AM

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

Explain JSON Web Tokens (JWT) and their use case in PHP APIs. 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,

PHP Program to Count Vowels in a String PHP Program to Count Vowels in a String Feb 07, 2025 pm 12:12 PM

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

How do you parse and process HTML/XML in PHP? How do you parse and process HTML/XML in PHP? Feb 07, 2025 am 11:57 AM

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

Explain late static binding in PHP (static::). Explain late static binding in PHP (static::). Apr 03, 2025 am 12:04 AM

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 PHP magic methods (__construct, __destruct, __call, __get, __set, etc.) and provide use cases? What are PHP magic methods (__construct, __destruct, __call, __get, __set, etc.) and provide use cases? Apr 03, 2025 am 12:03 AM

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.

See all articles