Home Backend Development PHP Tutorial PHP implementation of encapsulated multi-file upload class examples and detailed explanation of usage

PHP implementation of encapsulated multi-file upload class examples and detailed explanation of usage

May 26, 2018 am 11:49 AM
php upload Example

This article mainly introduces the examples and usage of the PHP encapsulated multi-file upload class. It analyzes the definition and specific usage of the PHP multi-file upload class in detail in the form of examples. Friends in need can refer to it

The details are as follows:

<?php
/**//*
 * @(#)UploadFile.php
 *
 * 可同时处理用户多个上传文件。效验文件有效性后存储至指定目录。
 * 可返回上传文件的相关有用信息供其它程序使用。(如文件名、类型、大小、保存路径)
 * 使用方法请见本类底部(UploadFile类使用注释)信息。
 *
 */
class UploadFile {
 var $user_post_file = array(); //用户上传的文件
 var $save_file_path;  //存放用户上传文件的路径
 var $max_file_size;   //文件最大尺寸
 var $last_error;   //记录最后一次出错信息
 //默认允许用户上传的文件类型
 var $allow_type = array(&#39;gif&#39;, &#39;jpg&#39;, &#39;png&#39;, &#39;zip&#39;, &#39;rar&#39;, &#39;txt&#39;, &#39;doc&#39;, &#39;pdf&#39;);
 var $final_file_path; //最终保存的文件名
 var $save_info = array(); //返回一组有用信息,用于提示用户。
 /**//**
 * 构造函数,用与初始化相关信息,用户待上传文件、存储路径等
 *
 * @param Array $file 用户上传的文件
 * @param String $path 存储用户上传文件的路径
 * @param Integer $size 允许用户上传文件的大小(字节)
 * @param Array $type  此数组中存放允计用户上传的文件类型
 */
 function UploadFile($file, $path, $size = 2097152, $type = &#39;&#39;) {
 $this->user_post_file = $file;
 $this->save_file_path = $path;
 $this->max_file_size = $size; //如果用户不填写文件大小,则默认为2M.
 if ($type != &#39;&#39;)
  $this->allow_type = $type;
 }
 /**//**
 * 存储用户上传文件,检验合法性通过后,存储至指定位置。
 * @access public
 * @return int  值为0时上传失败,非0表示上传成功的个数。
 */
 function upload() {
 for ($i = 0; $i < count($this->user_post_file[&#39;name&#39;]); $i++) {
  //如果当前文件上传功能,则执行下一步。
  if ($this->user_post_file[&#39;error&#39;][$i] == 0) {
  //取当前文件名、临时文件名、大小、扩展名,后面将用到。
  $name = $this->user_post_file[&#39;name&#39;][$i];
  $tmpname = $this->user_post_file[&#39;tmp_name&#39;][$i];
  $size = $this->user_post_file[&#39;size&#39;][$i];
  $mime_type = $this->user_post_file[&#39;type&#39;][$i];
  $type = $this->getFileExt($this->user_post_file[&#39;name&#39;][$i]);
  //检测当前上传文件大小是否合法。
  if (!$this->checkSize($size)) {
   $this->last_error = "The file size is too big. File name is: ".$name;
   $this->halt($this->last_error);
   continue;
  }
  //检测当前上传文件扩展名是否合法。
  if (!$this->checkType($type)) {
   $this->last_error = "Unallowable file type: .".$type." File name is: ".$name;
   $this->halt($this->last_error);
   continue;
  }
  //检测当前上传文件是否非法提交。
  if(!is_uploaded_file($tmpname)) {
   $this->last_error = "Invalid post file method. File name is: ".$name;
   $this->halt($this->last_error);
   continue;
  }
  //移动文件后,重命名文件用。
  $basename = $this->getBaseName($name, ".".$type);
  //移动后的文件名
  $saveas = $basename."-".time().".".$type;
  //组合新文件名再存到指定目录下,格式:存储路径 + 文件名 + 时间 + 扩展名
  $this->final_file_path = $this->save_file_path."/".$saveas;
  if(!move_uploaded_file($tmpname, $this->final_file_path)) {
   $this->last_error = $this->user_post_file[&#39;error&#39;][$i];
   $this->halt($this->last_error);
   continue;
  }
  //存储当前文件的有关信息,以便其它程序调用。
  $this->save_info[] = array("name" => $name, "type" => $type,
      "mime_type" => $mime_type,
               "size" => $size, "saveas" => $saveas,
               "path" => $this->final_file_path);
  }
 }
 return count($this->save_info); //返回上传成功的文件数目
 }
 /**//**
 * 返回一些有用的信息,以便用于其它地方。
 * @access public
 * @return Array 返回最终保存的路径
 */
 function getSaveInfo() {
 return $this->save_info;
 }
 /**//**
 * 检测用户提交文件大小是否合法
 * @param Integer $size 用户上传文件的大小
 * @access private
 * @return boolean 如果为true说明大小合法,反之不合法
 */
 function checkSize($size) {
 if ($size > $this->max_file_size) {
  return false;
 }
 else {
  return true;
 }
 }
 /**//**
 * 检测用户提交文件类型是否合法
 * @access private
 * @return boolean 如果为true说明类型合法,反之不合法
 */
 function checkType($extension) {
 foreach ($this->allow_type as $type) {
  if (strcasecmp($extension , $type) == 0)
  return true;
 }
 return false;
 }
 /**//**
 * 显示出错信息
 * @param $msg  要显示的出错信息
 * @access private
 */
 function halt($msg) {
 printf("<b><UploadFile Error:></b> %s <br>\n", $msg);
 }
 /**//**
 * 取文件扩展名
 * @param String $filename 给定要取扩展名的文件
 * @access private
 * @return String   返回给定文件扩展名
 */
 function getFileExt($filename) {
 $stuff = pathinfo($filename);
 return $stuff[&#39;extension&#39;];
 }
 /**//**
 * 取给定文件文件名,不包括扩展名。
 * eg: getBaseName("j:/hexuzhong.jpg"); //返回 hexuzhong
 *
 * @param String $filename 给定要取文件名的文件
 * @access private
 * @return String 返回文件名
 */
 function getBaseName($filename, $type) {
 $basename = basename($filename, $type);
 return $basename;
 }
}
/**//******************** UploadFile类使用注释
//注意,上传组件name属性不管是一个还是多个都要使用数组形式,如:
<input type="file" name="user_upload_file[]">
<input type="file" name="user_upload_file[]">
//如果用户点击了上传按钮。
if ($_POST[&#39;action&#39;] == "上传") {
 //设置允许用户上传的文件类型。
 $type = array(&#39;gif&#39;, &#39;jpg&#39;, &#39;png&#39;, &#39;zip&#39;, &#39;rar&#39;);
 //实例化上传类,第一个参数为用户上传的文件组、第二个参数为存储路径、
 //第三个参数为文件最大大小。如果不填则默认为2M
 //第四个参数为充许用户上传的类型数组。如果不填则默认为gif, jpg, png, zip, rar, txt, doc, pdf
 $upload = new UploadFile($_FILES[&#39;user_upload_file&#39;], &#39;j:/tmp&#39;, 100000, $type);
 //上传用户文件,返回int值,为上传成功的文件个数。
 $num = $upload->upload();
 if ($num != 0) {
 echo "上传成功<br>";
 //取得文件的有关信息,文件名、类型、大小、路径。用print_r()打印出来。
 print_r($upload->getSaveInfo());
 //格式为: Array
 //  (
 //  [0] => Array(
 //    [name] => example.txt
 //    [type] => txt
 //    [size] => 526
 //    [path] => j:/tmp/example-1108898806.txt
 //    )
 //  )
 echo $num."个文件上传成功";
 }
 else {
 echo "上传失败<br>";
 }
}
*/
?>
Copy after login

The above is the entire content of this article, I hope it will be helpful to everyone's study.


Related recommendations:

PHP file upload function——Multiple file upload

php3.2 implementationMultiple file upload

How to implement PHPMultiple file upload

The above is the detailed content of PHP implementation of encapsulated multi-file upload class examples and detailed explanation of usage. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Roblox: Bubble Gum Simulator Infinity - How To Get And Use Royal Keys
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Nordhold: Fusion System, Explained
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Hot Topics

Java Tutorial
1664
14
PHP Tutorial
1269
29
C# Tutorial
1248
24
Explain JSON Web Tokens (JWT) and their use case in PHP APIs. 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,

PHP Program to Count Vowels in a String 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 late static binding in PHP (static::). 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? 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.

PHP and Python: Comparing Two Popular Programming Languages PHP and Python: Comparing Two Popular Programming Languages Apr 14, 2025 am 12:13 AM

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 in Action: Real-World Examples and Applications PHP in Action: Real-World Examples and Applications Apr 14, 2025 am 12:19 AM

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: A Key Language for Web Development PHP: A Key Language for Web Development Apr 13, 2025 am 12:08 AM

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

The Enduring Relevance of PHP: Is It Still Alive? The Enduring Relevance of PHP: Is It Still Alive? Apr 14, 2025 am 12:12 AM

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.

See all articles