PHP接收上传的文件-PHP Tutorial-php.cn

Home

Backend Development

PHP Tutorial

PHP接收上传的文件

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB

Jun 20, 2016 pm 12:53 PM

提交文件的HTML页面：

<!DOCTYPE html><html><head><meta charset="UTF-8"><title>文件上传</title><!--注意：enctype="multipart/form-data";拼写不要写成enctype="multipart/from-data";重点：enctype="multipart/form-data"type="file"--></head><body>    <form action="u.php" method="post" enctype="multipart/form-data">        用户名:<input type="text" name="username" /><br />        头像:<input type="file" name="pic" /><br />        <input type="submit" value="提交" />    </form></body></html>

PHP接收文件：

<?php/*PHP文件上传的过程:1:提交后,文件自动发到服务器上,形成一个临时文件2:在服务器上,只需要把临时文件移动到自己想要的位置，就可以完成上传操作疑问: 临时文件在哪儿呢?文件的其他信息如 文件名,文件大小,等,又在哪儿呢?答: PHP形成临时文件后,还会形成一个$_FILES超级全局数组数组里保存着文件的临时地址,临时名称,大小,等信息.所以 想上传文件,得先读$_FILES*//*文件上传的注意事项1:必须POST提交2:要声明 enctype选项*/echo "<pre class="brush:php;toolbar:false">";print_r($_FILES);echo "

";/*3:如何移动上传后的临时文件呢?答:用move_uploaded_file()函数*//*4:这个临时文件什么时间消失?答:临时文件在接收的.php文件结束后,就立即消失了.比如:02.php负责接收,当02.php运行完毕,临时文件就消失.sleep(5); //睡5秒钟,便于观察临时文件if(move_uploaded_file($_FILES['pic']['tmp_name'],'./file/' . $_FILES['pic']['name'])) { echo '成功';} else { echo '失败';}*/

内容来源：网络公益课，略有改动

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

How to make PHP applications fasterMay 12, 2025 am 12:12 AM

TomakePHPapplicationsfaster,followthesesteps:1)UseOpcodeCachinglikeOPcachetostoreprecompiledscriptbytecode.2)MinimizeDatabaseQueriesbyusingquerycachingandefficientindexing.3)LeveragePHP7 Featuresforbettercodeefficiency.4)ImplementCachingStrategiessuc

PHP Performance Optimization Checklist: Improve Speed NowMay 12, 2025 am 12:07 AM

ToimprovePHPapplicationspeed,followthesesteps:1)EnableopcodecachingwithAPCutoreducescriptexecutiontime.2)ImplementdatabasequerycachingusingPDOtominimizedatabasehits.3)UseHTTP/2tomultiplexrequestsandreduceconnectionoverhead.4)Limitsessionusagebyclosin

PHP Dependency Injection: Improve Code TestabilityMay 12, 2025 am 12:03 AM

Dependency injection (DI) significantly improves the testability of PHP code by explicitly transitive dependencies. 1) DI decoupling classes and specific implementations make testing and maintenance more flexible. 2) Among the three types, the constructor injects explicit expression dependencies to keep the state consistent. 3) Use DI containers to manage complex dependencies to improve code quality and development efficiency.

PHP Performance Optimization: Database Query OptimizationMay 12, 2025 am 12:02 AM

DatabasequeryoptimizationinPHPinvolvesseveralstrategiestoenhanceperformance.1)Selectonlynecessarycolumnstoreducedatatransfer.2)Useindexingtospeedupdataretrieval.3)Implementquerycachingtostoreresultsoffrequentqueries.4)Utilizepreparedstatementsforeffi

Simple Guide: Sending Email with PHP ScriptMay 12, 2025 am 12:02 AM

PHPisusedforsendingemailsduetoitsbuilt-inmail()functionandsupportivelibrarieslikePHPMailerandSwiftMailer.1)Usethemail()functionforbasicemails,butithaslimitations.2)EmployPHPMailerforadvancedfeatureslikeHTMLemailsandattachments.3)Improvedeliverability

PHP Performance: Identifying and Fixing BottlenecksMay 11, 2025 am 12:13 AM

PHP performance bottlenecks can be solved through the following steps: 1) Use Xdebug or Blackfire for performance analysis to find out the problem; 2) Optimize database queries and use caches, such as APCu; 3) Use efficient functions such as array_filter to optimize array operations; 4) Configure OPcache for bytecode cache; 5) Optimize the front-end, such as reducing HTTP requests and optimizing pictures; 6) Continuously monitor and optimize performance. Through these methods, the performance of PHP applications can be significantly improved.

Dependency Injection for PHP: a quick summaryMay 11, 2025 am 12:09 AM

DependencyInjection(DI)inPHPisadesignpatternthatmanagesandreducesclassdependencies,enhancingcodemodularity,testability,andmaintainability.Itallowspassingdependencieslikedatabaseconnectionstoclassesasparameters,facilitatingeasiertestingandscalability.

Increase PHP Performance: Caching Strategies & TechniquesMay 11, 2025 am 12:08 AM

CachingimprovesPHPperformancebystoringresultsofcomputationsorqueriesforquickretrieval,reducingserverloadandenhancingresponsetimes.Effectivestrategiesinclude:1)Opcodecaching,whichstorescompiledPHPscriptsinmemorytoskipcompilation;2)DatacachingusingMemc

See all articles