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File upload class library

A powerful php file upload class

File upload class library

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Code introduction: PHP file upload class, very powerful, for your reference

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How to upload a file in PHP?

27 Nov 2025

TouploadafileinPHP,createanHTMLformwithmethod="POST"andenctype="multipart/form-data",thenhandletheuploadinPHPusing$_FILEStoaccessfiledetails,checkforerrors,movethefilewithmove_uploaded_file(),validateextension,size,andtype,sanitiz

JavaScript tutorial to implement independent preview and status update of images in multiple file input boxes

10 Nov 2025

This tutorial aims to solve how to implement independent image preview and status text update for each file input box in a multi-file upload scenario. By correcting the misuse of IDs in HTML and using JavaScript's class selector and iteration methods, we ensure that each upload component can independently and correctly display the preview of the selected image and update its upload status to avoid cross-influence of content, thereby building a fully functional and user-friendly multi-file upload interface.

Get unique file record with latest upload details in Java

12 Jan 2026

Regarding the FileDetails class in Java, when multiple file records have the same file name but different upload dates, this article explores how to use the Java Stream API to efficiently filter out the latest upload details records for each unique file name from the collection, avoiding misunderstandings that the equals and hashCode methods may bring when processing versioned data.

How to upload a file in PHP? (A Complete Guide)

18 Dec 2025

PHP file upload requires correctly configuring the HTML form (POST enctype), verifying the $_FILES error and size, using move_uploaded_file to save safely, renaming the file, using finfo_open to verify the real MIME type, restricting the extension, and configuring the file_uploads and other parameters of php.ini.

Node.js Multer File Upload Guide: Ensure HTML Forms Are Configured Correctly

13 Dec 2025

This tutorial aims to solve the common problem of req.files (or req.file) showing as undefined when using the Node.js Multer library to handle HTML form file uploads. The article will delve into the file upload mechanism, focusing on the importance of the enctype="multipart/form-data" attribute in the HTML tag, and provide complete code examples and configuration guides to ensure the normal operation of the file upload function.

How to import an Excel or CSV file into the database in Laravel?

21 Nov 2025

First install the maatwebsite/excel package, then create an import class and define data mapping, handle file upload in the controller and call the Excel::import method to complete the import.