php文件上传获取文件扩展名，运行时会报提示
今天练习文件上传操作，但遇到一个很纠结的事
直接看代码：
文件上传页：index.html
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><br /><html><br /><head><br /><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><br /><title>Insert title here</title><br /></head><br /><body><br /><form method="post" action="test.php" enctype="multipart/form-data"><br />文件<input type="file" name="up1"/><br/><br /><input type="submit" value="上传"/><br /></form><br /></body><br /></html>
文件处理页：test.php
<br />foreach($_FILES as $v){ <br /> $info=pathinfo($v['name']);<br /> //var_dump($info);//查看$info中的信息；<br /> //exit;<br /> //echo $info['extentsion'];//报提示<br /> //exit;<br /> $v['ext']=$info['extension'];//得到文件扩展名<br /> $v['filename']=$info['filename'];//得到文件名<br /> echo $v['ext'];//能得到正确的扩展名<br /> exit; <br />}<br />事情是这样的, 当我echo $info['extension']总会报提示：Notice: Undefined index: extentsion in D:\WW.......
我var_dump($info)时，里面确实有"extension"啊
但是，如上代码所示$v['ext']=$info['extension'];后，我echo $v['ext'];却能得到正确的后缀名
这到底什么情况？？
------解决方案--------------------
//echo $info['extentsion'];//报提示
echo $info['extension'];//报提示
注意拼写啊 少年 怎么可能会有错误呢
PHP Performance Tuning for High Traffic WebsitesMay 14, 2025 am 12:13 AMThesecrettokeepingaPHP-poweredwebsiterunningsmoothlyunderheavyloadinvolvesseveralkeystrategies:1)ImplementopcodecachingwithOPcachetoreducescriptexecutiontime,2)UsedatabasequerycachingwithRedistolessendatabaseload,3)LeverageCDNslikeCloudflareforservin
Dependency Injection in PHP: Code Examples for BeginnersMay 14, 2025 am 12:08 AMYou should care about DependencyInjection(DI) because it makes your code clearer and easier to maintain. 1) DI makes it more modular by decoupling classes, 2) improves the convenience of testing and code flexibility, 3) Use DI containers to manage complex dependencies, but pay attention to performance impact and circular dependencies, 4) The best practice is to rely on abstract interfaces to achieve loose coupling.
PHP Performance: is it possible to optimize the application?May 14, 2025 am 12:04 AMYes,optimizingaPHPapplicationispossibleandessential.1)ImplementcachingusingAPCutoreducedatabaseload.2)Optimizedatabaseswithindexing,efficientqueries,andconnectionpooling.3)Enhancecodewithbuilt-infunctions,avoidingglobalvariables,andusingopcodecaching
PHP Performance Optimization: The Ultimate GuideMay 14, 2025 am 12:02 AMThekeystrategiestosignificantlyboostPHPapplicationperformanceare:1)UseopcodecachinglikeOPcachetoreduceexecutiontime,2)Optimizedatabaseinteractionswithpreparedstatementsandproperindexing,3)ConfigurewebserverslikeNginxwithPHP-FPMforbetterperformance,4)
PHP Dependency Injection Container: A Quick StartMay 13, 2025 am 12:11 AMAPHPDependencyInjectionContainerisatoolthatmanagesclassdependencies,enhancingcodemodularity,testability,andmaintainability.Itactsasacentralhubforcreatingandinjectingdependencies,thusreducingtightcouplingandeasingunittesting.
Dependency Injection vs. Service Locator in PHPMay 13, 2025 am 12:10 AMSelect DependencyInjection (DI) for large applications, ServiceLocator is suitable for small projects or prototypes. 1) DI improves the testability and modularity of the code through constructor injection. 2) ServiceLocator obtains services through center registration, which is convenient but may lead to an increase in code coupling.
PHP performance optimization strategies.May 13, 2025 am 12:06 AMPHPapplicationscanbeoptimizedforspeedandefficiencyby:1)enablingopcacheinphp.ini,2)usingpreparedstatementswithPDOfordatabasequeries,3)replacingloopswitharray_filterandarray_mapfordataprocessing,4)configuringNginxasareverseproxy,5)implementingcachingwi
PHP Email Validation: Ensuring Emails Are Sent CorrectlyMay 13, 2025 am 12:06 AMPHPemailvalidationinvolvesthreesteps:1)Formatvalidationusingregularexpressionstochecktheemailformat;2)DNSvalidationtoensurethedomainhasavalidMXrecord;3)SMTPvalidation,themostthoroughmethod,whichchecksifthemailboxexistsbyconnectingtotheSMTPserver.Impl
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
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft
Notepad++7.3.1
Easy-to-use and free code editor
SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.
PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool
EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function
