PHP实现文件上传功能
PHP实现一个文件上传的功能还是比较容易的,这里简单记录一下自己使用方法。 这里是一次接收多个文件上传的脚本upload.php,如下: ?php// 实现多个文件上传并保存的后端?//设置编码为UTF-8,以避免中文乱码header('Content-Type:text/html;charset=utf-8');
PHP实现一个文件上传的功能还是比较容易的,这里简单记录一下自己使用方法。
这里是一次接收多个文件上传的脚本upload.php,如下:
<?php // 实现多个文件上传并保存的后端 ? //设置编码为UTF-8,以避免中文乱码 header('Content-Type:text/html;charset=utf-8'); ? //获取多个文件的信息,注意:这里的键名不包含[] $fileArray = $_FILES['upload_file']; ? $upload_dir = 'img/'; //保存上传文件的目录 ? foreach ( $fileArray['error'] as $key => $error ) { if ( $error == UPLOAD_ERR_OK ) { //PHP常量UPLOAD_ERR_OK值为0,表示文件上传成功 $temp_name = $fileArray['tmp_name'][$key]; $file_name = $fileArray['name'][$key]; move_uploaded_file($temp_name, $upload_dir.$file_name); echo '上传[文件'.$key.':'.$file_name.']成功!'; }else { echo '上传[文件'.$key.':'.$file_name.']失败!'; } } ?>
关于上传文件的大小限制,对于我目前的nginx + php-fpm,有nginx和php的两层限制。
nignx的限制,目前默认是1MB的请求body,可以在配置文件/etc/nginx/nginx.conf中来调整:
http { include /etc/nginx/mime.types; default_type application/octet-stream; ? client_max_body_size 10M; #设置最大的body size ... }
如果超过client_max_body_size的限制,nginx会返回413响应码表示“Request Entity Too Large ”。
PHP对post请求内容的大小限制:
在/etc/php.ini文件中,有如下内容:
? ; Maximum amount of time each script may spend parsing request data. It's a good ; idea to limit this time on productions servers in order to eliminate unexpectedly ; long running scripts. ; http://www.php.net/manual/en/info.configuration.php#ini.max-input-time max_input_time = 60 ? ; Maximum size of POST data that PHP will accept. ; http://www.php.net/manual/en/ini.core.php#ini.post-max-size post_max_size = 10M ? ; Whether to allow HTTP file uploads. ; http://www.php.net/manual/en/ini.core.php#ini.file-uploads file_uploads = On ? ; Maximum allowed size for uploaded files. ; http://www.php.net/manual/en/ini.core.php#ini.upload-max-filesize upload_max_filesize = 10M
参考资料:
http://www.365mini.com/page/php-upload-file.htm
http://www.php.net/manual/zh/features.file-upload.php
http://forum.nginx.org/read.php?2,139769,139769#msg-139769
Original article: PHP实现文件上传功能
©2014 笑遍世界. All Rights Reserved.
原文地址:PHP实现文件上传功能, 感谢原作者分享。

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











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,

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.

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 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 is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7

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.

In PHP8, match expressions are a new control structure that returns different results based on the value of the expression. 1) It is similar to a switch statement, but returns a value instead of an execution statement block. 2) The match expression is strictly compared (===), which improves security. 3) It avoids possible break omissions in switch statements and enhances the simplicity and readability of the code.
