upLoad.php
<!-- <link rel="stylesheet" href="myCss.css" type="text/css" /> --> <div class="register"> <form enctype="multipart/form-data" method="post" action="upLoadProcess.php" name="myform"> <table> <tr> <td align="center" colspan="2"><font style="font-size:40px;font-family:华文彩云">文件上传</font></td> </tr> <tr> <td>请填写用户名:</td> <td><input type="text" name="username"></td> </tr> <tr> <td>请简单介绍该文件</td> <td><textarea name="fileintro" rows="10" cols="80"></textarea></td> </tr> <tr> <td colspan="2">请选择要上传的文件:<input type="file" name="myfile"> </td> </tr> <tr> <td align="center" colspan="2"><input type="submit" value="上传文件"></td> </tr> </table> </form> </div> <?php if(isset($_GET['flag'])){ $flag = $_GET['flag']; if($flag == 1){ echo "<br/<br/><font style="'color:red'">文件大小不能超过2M</font>"; } } ?>
upLoadProcess.php
<?php //接收提交文件的信息 if(isset($_POST['username'])){ $username=$_POST['username']; }else{ echo "上传文件失败"; exit(); } if(isset($_POST['fileintro'])){ $fileintro = $_POST['fileintro']; } $file_size = $_FILES['myfile']['size']; if($file_size > 2*1024*1024){ echo "<font style="'color:red'">文件过大,不能上传超过2M的文件</font><br>"; echo "<a href="'upLoad.php'">返回重新上传</a>"; exit(); } $file_type = $_FILES['myfile']['type']; if($file_type != "image/jpg" && $file_type != "image/pjpeg"){ echo "文件类型只能是jpg的"; exit(); } // echo "<pre class="brush:php;toolbar:false">"; // print_r($_FILES); // echo ""; if(is_uploaded_file($_FILES['myfile']['tmp_name'])){ //把文件转存到你希望的目录; $upLoaded_file = $_FILES['myfile']['tmp_name']; $fileName = $_FILES['myfile']['name']; //给每个用户动态的创建一个文件夹 $user_path = $_SERVER['DOCUMENT_ROOT']."/fileOpt/upLoadFiles/".$username; if(!file_exists($user_path)){ mkdir($user_path); } //$destPath = $user_path."/".$fileName; $destPath = $user_path."/".(time().rand(0,1000)).substr($fileName,strrpos($fileName, ".")); //如果目标文件存在,则被覆盖 if(move_uploaded_file($upLoaded_file,$destPath)){ echo $_FILES['myfile']['name']." 上传成功!"; }else{ echo "上传失败!
"; echo "返回重新上传"; } }else{ echo "上传失败!
"; echo "返回重新上传"; } ?>
The above introduces PHP file uploading, including aspects of content. I hope it will be helpful to friends who are interested in PHP tutorials.

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 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 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.


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