How to download files safely with PHP,
The example in this article describes the method of downloading files safely with PHP. Share it with everyone for your reference, the details are as follows:
<?php header('Content-Type:text/html;Charset=utf-8'); define('ROOT_PATH', dirname(__FILE__)); /** * 下载文件 * @param string $file_path 绝对路径 */ function downFile($file_path) { //判断文件是否存在 $file_path = iconv('utf-8', 'gb2312', $file_path); //对可能出现的中文名称进行转码 if (!file_exists($file_path)) { exit('文件不存在!'); } $file_name = basename($file_path); //获取文件名称 $file_size = filesize($file_path); //获取文件大小 $fp = fopen($file_path, 'r'); //以只读的方式打开文件 header("Content-type: application/octet-stream"); header("Accept-Ranges: bytes"); header("Accept-Length: {$file_size}"); header("Content-Disposition: attachment;filename={$file_name}"); $buffer = 1024; $file_count = 0; //判断文件是否结束 while (!feof($fp) && ($file_size-$file_count>0)) { $file_data = fread($fp, $buffer); $file_count += $buffer; echo $file_data; } fclose($fp); //关闭文件 } downFile(ROOT_PATH . '/down/Sunset.jpg'); ?>
Note: The file name can accept Chinese names. The file format is utf-8.
Readers who are interested in more PHP related content can check out the special topics of this site: "php curl usage summary", "PHP operation and operator usage summary", "PHP network programming skills summary", "PHP basic syntax introductory tutorial" ", "Summary of PHP office document operation skills (including word, excel, access, ppt)", "Summary of PHP date and time usage", "Introduction to PHP object-oriented programming tutorial", "Summary of PHP string (string) usage" , "Introduction Tutorial on PHP MySQL Database Operation" and "Summary of Common PHP Database Operation Skills"
I hope this article will be helpful to everyone in PHP programming.
Articles you may be interested in:
- How to use storage to upload and download files using PHP on SAE
- PHP can implement remote downloading of files to the local machine
- PHP method to prevent hotlinking of image files and downloaded files
- Sharing of PHP download file code compatible with IE6 browser
- php download file source code (forced download of any file format)
- Example of method to automatically add BOM header when PHP downloads files
- Analysis of how to solve the problem of garbled characters in PHP download file names
- Detailed explanation of downloading files based on PHP
- php download Code examples of files
- Code to force file download in php (solve the problem of garbled Chinese file names under IE)
- PHP implementation code for downloading files and solutions to garbled file names

PHP is used to build dynamic websites, and its core functions include: 1. Generate dynamic content and generate web pages in real time by connecting with the database; 2. Process user interaction and form submissions, verify inputs and respond to operations; 3. Manage sessions and user authentication to provide a personalized experience; 4. Optimize performance and follow best practices to improve website efficiency and security.

PHP uses MySQLi and PDO extensions to interact in database operations and server-side logic processing, and processes server-side logic through functions such as session management. 1) Use MySQLi or PDO to connect to the database and execute SQL queries. 2) Handle HTTP requests and user status through session management and other functions. 3) Use transactions to ensure the atomicity of database operations. 4) Prevent SQL injection, use exception handling and closing connections for debugging. 5) Optimize performance through indexing and cache, write highly readable code and perform error handling.

Using preprocessing statements and PDO in PHP can effectively prevent SQL injection attacks. 1) Use PDO to connect to the database and set the error mode. 2) Create preprocessing statements through the prepare method and pass data using placeholders and execute methods. 3) Process query results and ensure the security and performance of the code.

PHP and Python have their own advantages and disadvantages, and the choice depends on project needs and personal preferences. 1.PHP is suitable for rapid development and maintenance of large-scale web applications. 2. Python dominates the field of data science and machine learning.

PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.

PHP makes it easy to create interactive web content. 1) Dynamically generate content by embedding HTML and display it in real time based on user input or database data. 2) Process form submission and generate dynamic output to ensure that htmlspecialchars is used to prevent XSS. 3) Use MySQL to create a user registration system, and use password_hash and preprocessing statements to enhance security. Mastering these techniques will improve the efficiency of web development.

PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.

PHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.


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

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

SublimeText3 English version
Recommended: Win version, supports code prompts!

WebStorm Mac version
Useful JavaScript development tools

SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.

Zend Studio 13.0.1
Powerful PHP integrated development environment