把下面代码另存为uploads.php
function file_list($dir,$pattern=""){
$arr=array();
$dir_handle=opendir($dir);
if($dir_handle){
while(($file=readdir($dir_handle))!==false){
if($file==='.' || $file==='..'){
continue;
}
$tmp=realpath($dir.'/'.$file);
if(is_dir($tmp)){
$retArr=file_list($tmp,$pattern);
if(!empty($retArr)){
$arr[]=$retArr;
}
} else {
if($pattern==="" || preg_match($pattern,$tmp)){
$arr[]=$tmp;
}
}
}
closedir($dir_handle);
}
return $arr;
}
$d_root = $_SERVER['DOCUMENT_ROOT'];
$store_dir = "$d_root/uploads/";// 上传文件的储存位置
if (!is_dir($store_dir)) {
mkdir($store_dir,0777,true);
}
$file_arr = file_list($store_dir);
foreach ($file_arr as $v=>$k) {
$d_root_no = strlen($d_root);
$l = substr($k,$d_root_no);
echo $v.'号文件下载地址为: '.$_SERVER['SERVER_ADDR'].$l.'
';
}
$upload_file=isset($_FILES['upload_file']['tmp_name'])?$_FILES['upload_file']['tmp_name']:'';
$upload_file_name=isset($_FILES['upload_file']['name'])?$_FILES['upload_file']['name']:'';
$upload_file_size=isset($_FILES['upload_file']['size'])?$_FILES['upload_file']['size']:'';
if($upload_file){
$file_size_max = 1000*1000*200;// 200M限制文件上传最大容量(bytes)
if (!is_dir($store_dir)) {
mkdir($store_dir,0777,true);
}
$accept_overwrite = 1;//是否允许覆盖相同文件
// 检查文件大小
if ($upload_file_size > $file_size_max) {
echo "对不起,你的文件容量大于规定";
exit;
}
// 检查读写文件
if (file_exists($store_dir . $upload_file_name) && !$accept_overwrite) {
echo "存在相同文件名的文件";
exit;
}
//复制文件到指定目录
if (!move_uploaded_file($upload_file,$store_dir.$upload_file_name)) {
echo "复制文件失败";
exit;
}
}
if (isset($_FILES['upload_file'])) {
echo "
你上传了文件:";
echo isset($_FILES['upload_file']['name'])?$_FILES['upload_file']['name']:'';
echo "
";
//客户端机器文件的原名称。
echo "文件的 MIME 类型为:";
echo isset($_FILES['upload_file']['type'])?$_FILES['upload_file']['type']:'';
//文件的 MIME 类型,需要浏览器提供该信息的支持,例如“image/gif”。
echo "
";
echo "上传文件大小:";
echo isset($_FILES['upload_file']['size'])?$_FILES['upload_file']['size']:'';
//已上传文件的大小,单位为字节。
echo "
";
echo "文件上传后被临时储存为:";
echo isset($_FILES['upload_file']['tmp_name'])?$_FILES['upload_file']['tmp_name']:'';
//文件被上传后在服务端储存的临时文件名。
$erroe = isset($_FILES['upload_file']['error'])?$_FILES['upload_file']['error']:'';
switch($erroe){
case 0:
echo "上传成功"; break;
case 1:
echo "上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值."; break;
case 2:
echo "上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值。"; break;
case 3:
echo "文件只有部分被上传"; break;
case 4:
echo "没有文件被上传"; break;
case 6:
echo "没有缓存目录"; break;
case 7:
echo "上传目录不可读"; break;
case 8:
echo "上传停止"; break;
default :
echo "没有选择上传文件"; break;
}
echo "";
}
?>

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

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

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.

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

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

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.

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

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


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

SublimeText3 Chinese version
Chinese version, very easy to use

mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

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.

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.

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