A solution to a simple file upload error_PHP tutorial

I didn’t pay much attention to file uploading before. Yesterday I did a simple one but found that there were quite a lot of problems.

The initial program code is as follows:
uploadimg.php(as the current mainstream development language)

(as Current mainstream development languages)

//Determine whether it is an upload interface or an implementation interface. If it is an upload interface, display the following HTML page
if(!$_POST[UploadAction]):

?>

                                                                                                             name="reset" value="Reset">

(as the current mainstream development language)

//If it is an implementation page, display the following HTML page, And activate php(as the current mainstream development language)script
else:

?>

(as the current mainstream development language)

//www.knowsky.com initializes the status of UploadAction
$UploadAction=0;

$UploadFile=$_POST[UploadFile];

if(($UploadFile!="none") && ($UploadFile!=""))
{
$UploadPath=$_SERVER[DOCUMENT_ROOT]."";

if (!is_writeable ($UploadPath))
                                                                                                                                                                                                                                                                                             "$UploadPath directory is writable!";
}

$FileName=$UploadFile_name;

if($UploadFile_size<1024)
{

$FileSize =(string)$UploadFile_size."Bytes";

}

elseif($UploadFile_size<(1024*1024))

KB";
}
else
{
$FileSize=number_format((double)($UploadFile_size/(1024*1024)),1)."KB"; if(!file_exists($ UploadPath.$FileName))
                                                                                                                                                       


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TechArticle

I didn’t pay much attention to file uploading before. I made a simple one yesterday but found that there are quite a few problems. The initial program code is as follows: uploadimg.php (as the current mainstream development language)...