PHP用户映像上传创建指定的文件夹唯一图像名称

Question

我（PHP中的一个新手）仍在休假项目和另一个问题出现了，我找不到一个解决方案。所以我希望你们可以帮助我！我最后一次在这里发布了一些东西！我真的很感激你的帮助......前方！

我的问题： 我希望用户能够在登录时上传图片。他们在他们的个人资料上有几个小按钮，图像上有几个......他们应该能够改变它们...... 我想像这个一样 - >当用户上传图像时，脚本将在服务器上创建一个新文件夹。这将在“user_images”文件夹中（已存在）发生。所以一个用户有e.g. “ID= 55”在“User_Images”上传图像中创建一个文件夹“55”。我尝试并尝试并尝试并尝试过...使用不同的语法 - >“$ upload_dir=”但没有任何成功： - /我只是不将其工作...

是脚本的一部分：

<?php
include 'dbconfig.php';
page_protect();

$rs_settings = mysql_query("select * from user where id='$_SESSION[user_id]'");
while ($row_settings = mysql_fetch_array($rs_settings));


error_reporting (E_ALL ^ E_NOTICE);
session_start();
//only assign a new timestamp if the session variable is empty
if (!isset($_SESSION['user_id']) || strlen($_SESSION['user_id'])==0){
$_SESSION['user_id'] = mysql_query("select * from user where id='$_SESSION[user_id]'");         
//assign the timestamp to the session variable
$_SESSION['user_file_ext']= "";
}

$upload_dir = "user_images/";
$upload_path = $upload_dir;             
$large_image_prefix = "Large_";         
$thumb_image_prefix = "button_";            
$large_image_name = $large_image_prefix.$_SESSION['user_id'];    
image (append the timestamp to the filename)
$thumb_image_name = $thumb_image_prefix.$_SESSION['user_id'];     
image (append the timestamp to the filename)
$max_file = "1";    // Maximum file size in MB
$max_width = "";    // Max width allowed for the large image
$thumb_width = "87"; // Width of thumbnail image
$thumb_height = "35";   // Height of thumbnail image
// Only one of these image types should be allowed for upload
$allowed_image_types =     
array('image/pjpeg'=>"jpg",'image/jpeg'=>"jpg",'image/jpg'=>"jpg",'image/png'=>"png",
'image/x-png'=>"png",'image/gif'=>"gif");
$allowed_image_ext = array_unique($allowed_image_types); // do not change this
$image_ext = "";    // initialise variable, do not change this.
foreach ($allowed_image_ext as $mime_type => $ext) {
$image_ext.= strtoupper($ext)." ";
}

function resizeImage($image,$width,$height,$scale) {
list($imagewidth, $imageheight, $imageType) = getimagesize($image);
$imageType = image_type_to_mime_type($imageType);
$newImageWidth = ceil($width * $scale);
$newImageHeight = ceil($height * $scale);
$newImage = imagecreatetruecolor($newImageWidth,$newImageHeight);
switch($imageType) {
case "image/gif":
$source=imagecreatefromgif($image); 
break;
case "image/pjpeg":
case "image/jpeg":
case "image/jpg":
$source=imagecreatefromjpeg($image); 
break;
case "image/png":
case "image/x-png":
$source=imagecreatefrompng($image); 
break;
}
imagecopyresampled($newImage,$source,0,0,0,0,$newImageWidth,$newImageHeight,
$width,$height);
switch($imageType) {
case "image/gif":
imagegif($newImage,$image); 
break;
case "image/pjpeg":
case "image/jpeg":
case "image/jpg":
imagejpeg($newImage,$image,90); 
break;
case "image/png":
case "image/x-png":
imagepng($newImage,$image);  
break;
}
chmod($image, 0777);
return $image;
}

function resizeThumbnailImage($thumb_image_name, $image, $width, $height, $start_width,   
$start_height, $scale){
list($imagewidth, $imageheight, $imageType) = getimagesize($image);
$imageType = image_type_to_mime_type($imageType);

$newImageWidth = ceil($width * $scale);
$newImageHeight = ceil($height * $scale);
$newImage = imagecreatetruecolor($newImageWidth,$newImageHeight);
switch($imageType) {
case "image/gif":
$source=imagecreatefromgif($image); 
break;
case "image/pjpeg":
    case "image/jpeg":
    case "image/jpg":
        $source=imagecreatefromjpeg($image); 
        break;
    case "image/png":
    case "image/x-png":
        $source=imagecreatefrompng($image); 
        break;
}
imagecopyresampled($newImage,$source,0,0,$start_width,$start_height,$newImageWidth,
$newImageHeight,$width,$height);
switch($imageType) {
case "image/gif":
imagegif($newImage,$thumb_image_name); 
break;
case "image/pjpeg":
case "image/jpeg":
case "image/jpg":
imagejpeg($newImage,$thumb_image_name,90); 
break;
case "image/png":
case "image/x-png":
imagepng($newImage,$thumb_image_name);  
break;
}
chmod($thumb_image_name, 0777);
return $thumb_image_name;
}

function getHeight($image) {
$size = getimagesize($image);
$height = $size[1];
return $height;
}

function getWidth($image) {
$size = getimagesize($image);
$width = $size[0];
return $width;
}


$large_image_location = $upload_path.$large_image_name.$_SESSION['user_file_ext'];
$thumb_image_location = $upload_path.$thumb_image_name.$_SESSION['user_file_ext'];


if(!is_dir($upload_dir)){
mkdir($upload_dir, 0777);
chmod($upload_dir, 0777);
}


if (file_exists($large_image_location)){
 if(file_exists($thumb_image_location)){
    $thumb_photo_exists = "<img
src=\"".$upload_path.$thumb_image_name.$_SESSION['user_file_ext']."\" alt=\"Thumbnail   
Image\"/>";
}else{
 $thumb_photo_exists = "";
}
$large_photo_exists = "<img  
src=\"".$upload_path.$large_image_name.$_SESSION['user_file_ext']."\" alt=\"Large   
Image\"/>";
} else {
$large_photo_exists = "";
$thumb_photo_exists = "";
}

if (isset($_POST["upload"])) { 
//Get the file information
$userfile_name = $_FILES['image']['name'];
$userfile_tmp = $_FILES['image']['tmp_name'];
$userfile_size = $_FILES['image']['size'];
$userfile_type = $_FILES['image']['type'];
$filename = basename($_FILES['image']['name']);
$file_ext = strtolower(substr($filename, strrpos($filename, '.') + 1));

//Only process if the file is a JPG, PNG or GIF and below the allowed limit
if((!empty($_FILES["image"])) && ($_FILES['image']['error'] == 0)) {

    foreach ($allowed_image_types as $mime_type => $ext) {
        //loop through the specified image types and if they match the     
extension then break out
        //everything is ok so go and check file size
        if($file_ext==$ext && $userfile_type==$mime_type){
            $error = "";
            break;
        }else{
            $error = "Only <strong>".$image_ext."</strong> images accepted for upload<br />";
        }
    }
    //check if the file size is above the allowed limit
    if ($userfile_size > ($max_file*1048576)) {
        $error.= "Images must be under ".$max_file."MB in size";
    }

}else{
    $error= "Select an image for upload";
}
//Everything is ok, so we can upload the image.
if (strlen($error)==0){

    if (isset($_FILES['image']['name'])){
        //this file could now has an unknown file extension (we hope it's one of the ones set above!)
        $large_image_location = $large_image_location.".".$file_ext;
        $thumb_image_location = $thumb_image_location.".".$file_ext;

        //put the file ext in the session so we know what file to look for once its uploaded
        $_SESSION['user_file_ext']=".".$file_ext;

        move_uploaded_file($userfile_tmp, $large_image_location);
        chmod($large_image_location, 0777);

        $width = getWidth($large_image_location);
        $height = getHeight($large_image_location);
        //Scale the image if it is greater than the width set above
        if ($width > $max_width){
            $scale = $max_width/$width;
            $uploaded = resizeImage($large_image_location,$width,$height,$scale);
        }else{
            $scale = 1;
            $uploaded = resizeImage($large_image_location,$width,$height,$scale);
        }
        //Delete the thumbnail file so the user can create a new one
        if (file_exists($thumb_image_location)) {
            unlink($thumb_image_location);
        }
    }
    //Refresh the page to show the new uploaded image
    header("location:".$_SERVER["PHP_SELF"]);
    exit();
}
?>

.

如果有人可以帮助我解决这些问题，那将是非常酷的......你可能知道，当你只是一个新秀时，你可能知道它是多么努力！如果那里有更奇怪的语法......让我知道，我只是一个初学者（就像我们都在开始时）并试图变得更好:)

谢谢你们！

Answer 1

请记住，允许任何用户将内容上载到服务器创建一个需要特别注意的安全漏洞，这是我过去使用的代码，用于内部使用应用程序：

$folderPath = "/uploads/" . $folderName;
$exist = is_dir($folderPath);

if(!$exist) {
mkdir("$folderPath");
chmod("$folderPath", 0755);
}
else { echo "Folder already exists"; }

.

您还可以从MKDIR中CHMOD，但是在此特定服务器配置中执行此操作。

http://php.net/manual/en/function.mkdir.php

更新与更完整的例子：

// Define path where file will be uploaded to
//   User ID is set as directory name
$folderPath = "/uploads/$userID";

// Check to see if directory already exists
$exist = is_dir($folderPath);

// If directory doesn't exist, create directory
if(!$exist) {
mkdir("$folderPath");
chmod("$folderPath", 0755);
}
else { echo "Folder already exists"; }


// PROCESS FILE UPLOAD

// Set initial/temporary upload location
//   temp_uploads must have proper read/write permissions (755 or 777)
$target_path = "/uploads/temp_uploads/";

// Append the name of the uploaded file to the temp directory
$target_path .= basename( $_FILES['uploadedfile']['name']);

if(move_uploaded_file($_FILES['uploadedfile']['tmp_name'], $target_path)) {
$filename = basename( $_FILES['uploadedfile']['name']);

// Location where temporary file is being stored
$temp_location = '/uploads/temp_uploads/' . basename( $_FILES['uploadedfile']['name']);

// Final destination where file will be located
$destination = "/uploads/$folderPath/$filename";

rename($temp_location, $destination);
}

.

Answer 2

您正在为$_SESSION["user_id"] 分配mysql查询资源

$_SESSION['user_id'] = mysql_query("select * from user where id='$_SESSION[user_id]'");

.

我认为你想从该查询中获取用户ID

如果您的代码会产生任何错误，如果您在问题中包含它们会很棒

ps。不要使用MySQL_ *函数，如果没有正确使用，他们被弃用并创建不需要的安全漏洞，学习DIBI，PDO或任何其他较新数据库层

Answer 3

$file_name=basename($_FILES['uploadedfile']['name']);
mkdir("upload/".$username,0777);
$target_path = "upload/$username/". $file_name;

.