How to encapsulate PHP upload function
How to encapsulate the php upload function?
<?php
//上传文件调用
$file = $_FILES['image'];
//允许上传的类型
$allow = array('image/jpeg', 'image/png', 'image/jpg', 'image/gif');
$path = './uploads';
$maxsize = 1024 * 1024 * 3;
$result = upload($file, $allow, $error, $path, $maxsize);
if ($result) {
//上传成功
echo "文件上传成功，新的文件名叫".$result;
}else{
//上传失败
echo $error;
}
/**
*文件的上传
*@param array $file 上传的文件的相关信息（是一个数组有五个元素）
*@param array $allow 允许文件上传的类型
*@param string & $error 引用传递，用来记录错误的信息
*@param string $path 文件上传的目录,不带最后的 /
*@param int $maxsize = 1024*1024 允许上传的文件大小
*@return mixed false | $newname 如果上传失败返回false，成功返回文件的新名字
**/
function upload($file, $allow, &$error, $path, $maxsize =1048576){
//先判断系统错误
switch ($file['error']) {
case 1:
$error = '上传错误，超出了服务器文件限制的大小!';
return false;
case 2:
$error = '上传错误，超出了浏览器表单允许的大小!';
return false;
case 3:
$error = '上传错误，文件上传不完整!';
return false;
case 4:
$error = '上传错误，请您先选择要上传的文件!';
return false;
case 6:
case 7:
$error = '对不起，服务器繁忙，请稍后再试!';
return false;
}
//判断逻辑错误
//验证文件的大小
if ($file['size'] > $maxsize) {
//超出用户了自己规定的大小
$error = '上传错误，超出了文件限制的大小！';
return false;
}
//判断文件的类型
if (!in_array($file['type'], $allow)) {
//非法的文件类型
$error = '上传的文件的类型不正确，允许的类型有：'.implode(',', $allow);
return false;
}
//移动临时文件
//指定文件上传后保存的路径
$newname = randName($file['name']); //得到文件新的名字
//判断$path 目录是否存在 不存在则创建
if (!file_exists($path)) {
mkdir($path, 0777, true);
}
$target = $path . '/' . $newname;
$result = move_uploaded_file($file['tmp_name'], $target);
if ($result) {
//上传成功
return $newname;
}else{
//上传失败
$error = '发生未知错误，上传失败';
return false;
}
}
/**
*生成一个随机名字的函数 文件名=当前的时间 + 随机的几位数字
*@param string $filename 文件的原始名字
*@return string $newname 文件的新名字
*
*/
function randName($filename){
//生成文件名的时间部分
$newname = date('YmdHis');
//加上随机的6位数
$str = '0123456789';
for ($i=0; $i < 6; $i++) {
$newname .= $str[mt_rand(0, strlen($str)-1)];
}
//加上文件的后缀名
$newname .= strrchr($filename, '.');
return $newname;
}HTML upload code
<!DOCTYPE html> <html> <head> <title>文件上传</title> <meta charset="utf-8"> </head> <body> <form method="post" action="upload.php" enctype="multipart/form-data"> <input type="file" name="image"> <input type="submit" name="" value="上传"> </form> </body> </html>
Recommended: "PHP Tutorial"
The above is the detailed content of How to encapsulate PHP upload function. For more information, please follow other related articles on the PHP Chinese website!
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
1378
52
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
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
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
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
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,
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
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?
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.
