PHP多文件上传类
<?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('gif', 'jpg', 'png', 'zip', 'rar', 'txt', 'doc', 'pdf'); 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 = '') { $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 != '') $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['name']); $i++) { //如果当前文件上传功能,则执行下一步。 if ($this->user_post_file['error'][$i] == 0) { //取当前文件名、临时文件名、大小、扩展名,后面将用到。 $name = $this->user_post_file['name'][$i]; $tmpname = $this->user_post_file['tmp_name'][$i]; $size = $this->user_post_file['size'][$i]; $mime_type = $this->user_post_file['type'][$i]; $type = $this->getFileExt($this->user_post_file['name'][$i]); //检测当前上传文件大小是否合法。 if (!$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 = $this->user_post_file['error'][$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['extension']; } /** * 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['action'] == "上传") { //设置允许用户上传的文件类型。 $type = array('gif', 'jpg', 'png', 'zip', 'rar'); //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['user_upload_file'], 'j:/tmp', 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>"; } } */ ?>?

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 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.

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 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.

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

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.

In PHP, use the clone keyword to create a copy of the object and customize the cloning behavior through the \_\_clone magic method. 1. Use the clone keyword to make a shallow copy, cloning the object's properties but not the object's properties. 2. The \_\_clone method can deeply copy nested objects to avoid shallow copying problems. 3. Pay attention to avoid circular references and performance problems in cloning, and optimize cloning operations to improve efficiency.

PHP is suitable for web development and content management systems, and Python is suitable for data science, machine learning and automation scripts. 1.PHP performs well in building fast and scalable websites and applications and is commonly used in CMS such as WordPress. 2. Python has performed outstandingly in the fields of data science and machine learning, with rich libraries such as NumPy and TensorFlow.


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

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

WebStorm Mac version
Useful JavaScript development tools

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

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

Atom editor mac version download
The most popular open source editor