search
HomeBackend DevelopmentPHP Tutorialphp之文件下传类代码

php之文件上传类代码

/*  单个文件上传    功能  上传文件  配置允许的后缀  配置允许的大小    获取文件后缀  判断文件的后缀  报错  */  class UpTool{      protected $allowExt = 'jpg,jpeg,gif,bmp,png';      protected $maxSize = 1; //1M ,以M为单位        protected $file = null; //准备储存上传文件信息      protected $errno = 0;  //错误代码      protected $error = array(              0=>'无错',              1=>'上传文件大小超出系统限制',              2=>'上传文件的大小超出网页表单限制',              3=>'文件只有部分被上传',              4=>'没有文件被上传',              6=>'找不到临时文件夹',              7=>'文件写入失败',              8=>'不允许的文件后缀',              9=>'文件大小超出类的允许范围',              10=>'创建目录失败',              11=>'文件移动失败'          );        /*      上传      */      public function up($key) {          if (!isset($_FILES[$key])) {              return false;          }          $f = $_FILES[$key];            //检验上传是否成功          if ($f['error']) {              $this->errno = $f['error'];              return false;          }            //获取后缀          $ext = $this->getExt($f['name']);          //检查后缀          if (!$this->isAllowExt($ext)) {              $this->errno = 8;              return false;          }          //检查大小          if (!$this->isAllowSize($f['size'])) {              $this->errno = 9;              return false;          }          //创建目录          $dir = $this->mk_dir();          if ($dir == false) {              $this->errno = 10;              return fasle;          }            //生成随机文件名          $newname = $this->randName() . '.' .$ext;          //$dir = $dir . '/' .$newname;          //移动          if(!move_uploaded_file($f['tmp_name'], $dir . '/' .$newname)) {              $this->errno = 11;              return false;          }          return true;//str_replace(ROOT, '', $dir);      }        public function getErr(){          return $this->error[$this->errno];      }        /*      parm string $exts 允许的后缀      自动添加 允许的后缀,和文件的大小      */      public function setExt($exts) {          $this->allowExt = $exts;      }      public function setSize($num) {          $this->maxSize = $num;      }          /*          string $file      return string $ext 后缀       */        protected function getExt($file) {          $tmp = explode('.', $file);          return end($tmp);      }      /*      string $ext 文件后缀      return bool      防止大小写的问题      */      protected function isAllowExt($ext) {          return in_array(strtolower($ext), explode(',', strtolower($this->allowExt))) ;                }        /*          检查文件的大小      */      protected function isAllowSize($size) {          return $size <= $this->maxSize *1024*1024;      }      //按日期创建目录的方法      protected function mk_dir() {          $dir = 'images/' . date('Ym/d');          if(is_dir($dir) || mkdir($dir,0777,true)) {              return $dir;          } else {              return false;          }      }        /*          生成随机文件名      */      protected function randName($length = 6) {          $str = 'abcdefghijkmnpqrstuvwxyz23456789';          return substr(str_shuffle($str),0,$length);      }    }
form 表单
????<form action="up.php" method="post" enctype="multipart/form-data">          用户名:<input type="text" name="username" /> <br/>          头像:   <input type="file" name="pic" />          <input type="submit" value="提交" />      </form>

 

另起页面调用

 

require('./UpTool.class.php');    $uptool = new UpTool();  $uptool->setExt('rar,doc');  $uptool->setSize(1);      if ($uptool->up('pic')) {      echo '上传成功';  } else {      echo '失败';      echo $uptool->getErr();  }



 

Statement
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
The Continued Use of PHP: Reasons for Its EnduranceThe Continued Use of PHP: Reasons for Its EnduranceApr 19, 2025 am 12:23 AM

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python: Exploring Their Similarities and DifferencesPHP and Python: Exploring Their Similarities and DifferencesApr 19, 2025 am 12:21 AM

PHP and Python are both high-level programming languages ​​that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP and Python: Different Paradigms ExplainedPHP and Python: Different Paradigms ExplainedApr 18, 2025 am 12:26 AM

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP and Python: A Deep Dive into Their HistoryPHP and Python: A Deep Dive into Their HistoryApr 18, 2025 am 12:25 AM

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

Choosing Between PHP and Python: A GuideChoosing Between PHP and Python: A GuideApr 18, 2025 am 12:24 AM

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP and Frameworks: Modernizing the LanguagePHP and Frameworks: Modernizing the LanguageApr 18, 2025 am 12:14 AM

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHP's Impact: Web Development and BeyondPHP's Impact: Web Development and BeyondApr 18, 2025 am 12:10 AM

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

How does PHP type hinting work, including scalar types, return types, union types, and nullable types?How does PHP type hinting work, including scalar types, return types, union types, and nullable types?Apr 17, 2025 am 12:25 AM

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values ​​and handle functions that may return null values.

See all articles

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 Tools

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

DVWA

DVWA

Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software

Dreamweaver Mac version

Dreamweaver Mac version

Visual web development tools

EditPlus Chinese cracked version

EditPlus Chinese cracked version

Small size, syntax highlighting, does not support code prompt function

Atom editor mac version download

Atom editor mac version download

The most popular open source editor