取得文件扩展名方法
变量 $file_name 可以来自上传域或者指定为其他
//方法一:
function extend($file_name)
{
$retval="";
$pt=strrpos($file_name, ".");
if ($pt) $retval=substr($file_name, $pt 1, strlen($file_name) - $pt);
return ($retval);
}
//方法二(php4.03及更高版本)
$extend = pathinfo($file_name);
$extend = strtolower($extend["extension"]);
echo $extend;
?>
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
Hongmeng native application random poetry
Feb 19, 2024 pm 01:36 PM
To learn more about open source, please visit: 51CTO Hongmeng Developer Community https://ost.51cto.com Running environment DAYU200:4.0.10.16SDK: 4.0.10.15IDE: 4.0.600 1. To create an application, click File- >newFile->CreateProgect. Select template: [OpenHarmony] EmptyAbility: Fill in the project name, shici, application package name com.nut.shici, and application storage location XXX (no Chinese, special characters, or spaces). CompileSDK10, Model: Stage. Device
Use java's File.length() function to get the size of the file
Jul 24, 2023 am 08:36 AM
Use Java's File.length() function to get the size of a file. File size is a very common requirement when dealing with file operations. Java provides a very convenient way to get the size of a file, that is, using the length() method of the File class. . This article will introduce how to use this method to get the size of a file and give corresponding code examples. First, we need to create a File object to represent the file we want to get the size of. Here is how to create a File object: Filef
How to convert php blob to file
Mar 16, 2023 am 10:47 AM
How to convert php blob to file: 1. Create a php sample file; 2. Through "function blobToFile(blob) {return new File([blob], 'screenshot.png', { type: 'image/jpeg' })} ” method can be used to convert Blob to File.
Rename files using java's File.renameTo() function
Jul 25, 2023 pm 03:45 PM
Use Java's File.renameTo() function to rename files. In Java programming, we often need to rename files. Java provides the File class to handle file operations, and its renameTo() function can easily rename files. This article will introduce how to use Java's File.renameTo() function to rename files and provide corresponding code examples. The File.renameTo() function is a method of the File class.
Use java's File.getParentFile() function to get the parent directory of the file
Jul 27, 2023 am 11:45 AM
Use java's File.getParentFile() function to get the parent directory of a file. In Java programming, we often need to operate files and folders. When we need to get the parent directory of a file, we can use the File.getParentFile() function provided by Java. This article explains how to use this function and provides code examples. File class in Java is the main class used to operate files and folders. It provides many methods to obtain and manipulate file properties
Use java's File.getParent() function to get the parent path of the file
Jul 24, 2023 pm 01:40 PM
Use java's File.getParent() function to get the parent path of a file. In Java programming, we often need to operate files and folders. Sometimes, we need to get the parent path of a file, which is the path of the folder where the file is located. Java's File class provides the getParent() method to obtain the parent path of a file or folder. The File class is Java's abstract representation of files and folders. It provides a series of methods for operating files and folders. Among them, get
How to delete a file or directory using File.delete() method in Java?
Nov 18, 2023 am 08:02 AM
How to delete a file or directory using File.delete() method in Java? Overview: In Java, we can delete a file or directory using the delete() method of the File class. This method is used to delete the specified file or directory. However, it should be noted that this method can only delete empty directories or files that are not opened by other programs. If file or directory deletion fails, you can find the specific reason by catching IOException. Step 1: Import related packages First, we need
WebView File Domain Origin Policy Bypass Vulnerability Example Analysis
May 15, 2023 am 08:22 AM
Basic knowledge of the Android architecture. Kernel kernel layer vulnerabilities are extremely harmful. The versatile drivers are numerous and complex, and there may also be many vulnerabilities. Libraries system runtime library layer system middleware provides runtime libraries including libc, WebKit, SQLite, etc. AndroidRunTimeDalvik virtual The machine and kernel library FrameWork application framework layer provides a series of services and API interfaces Activity Manager Content Provider View Resource Manager Notification Manager Application Application Layer System Application Home Screen Home, Contact Contact, Phone Phone, Browser Others Application developers use the application framework layer to
