用户上传图片到特定目录

Question

所以基本上我有一个网站，允许某些成员将图像（漫画页面）上传到他们自己的图片库（特定的漫画）。我有一个成功的图像上传脚本，用于上传每个成员的个人资料/头像图像，但现在我想将文件上传到更具体的位置，我遇到了一些麻烦。

到目前为止，这是我所拥有的：（

这是页面顶部显示的内容）

<?php
session_start();
$toplinks = "";
if (isset($_SESSION['id'])) {
    // Put stored session variables into local php variable
    $userid = $_SESSION['id'];
    $username = $_SESSION['username'];
    $toplinks = '<a href="member_profile.php?id=' . $userid . '">' . $username . '</a> &bull; 
    <a href="member_account.php">Account</a> &bull; 
    <a href="logout.php">Log Out</a>';
} else {
    $toplinks = '<a href="join_form.php">Register</a> &bull; <a href="login.php">Login</a>';
}
?>

（这是上传脚本）

<?php
// Here we run a login check
if (!isset($_SESSION['id'])) { 
   echo 'Please <a href="login.php">log in</a> to access your account';
  exit(); 
} 
// Place Session variable 'id' into local variable
$id = $_SESSION['id'];
// Process the form if it is submitted
if ($_FILES['uploadedfile']['tmp_name'] != "") {
    // Run error handling on the file
    // Set Max file size limit to somewhere around 120kb
    $maxfilesize = 400000;
    // Check file size, if too large exit and tell them why
    if($_FILES['uploadedfile']['size'] > $maxfilesize ) { 
        echo "<br /><br />Your image was too large. Must be 400kb or less, please<br /><br />
        <a href=\"upload_comic.php\">click here</a> to try again";
        unlink($_FILES['uploadedfile']['tmp_name']); 
        exit();
    // Check file extension to see if it is .jpg or .gif, if not exit and tell them why
    } else if (!preg_match("/\.(gif|jpg|png)$/i", $_FILES['uploadedfile']['name'] ) ) {
        echo "<br /><br />Your image was not .gif, .jpg, or .png and it must be one of those three formats.<br />
        <a href=\"upload_comic.php\">click here</a> to try again";
        unlink($_FILES['uploadedfile']['tmp_name']);
        exit();
        // If no errors on the file process it and upload to server 
    } else { 
        // Rename the pic
        $newname = ""; //numbers only, so they show up sequentially
        // Set the direntory for where to upload it, use the member id to hit their folder 
        // Upload the file
        if (move_uploaded_file($_FILES['uploadedfile']['tmp_name'], "comics/$comicid/".$newname)) {
            echo "Success, the image has been uploaded and will display to visitors!<br /><br />
            <a href=\"member_account.php\">Click here</a> to return to your profile edit area";
            exit();
        } else {
            echo "There was an error uploading the file, please try again. If it continually fails, contact us by email. <br /><br />
            <a href=\"member_account.php\">Click here</a> to return to your profile edit area";
            exit();
        }
    } // close else after file error checks
} // close if post the form
?>

理想情况下，我希望能够上传这样的图像：comics/comic_id/chapter_id/ uploaded_file.extension

使用用户个人资料图像上传器，我能够从 $_Session['id'] 变量中获取 $ID，但是对于漫画，我真的不知道如何获取该信息，并且用它来设置 Comic_id 目录（chapter_id 将在表单上选择，所以我不太担心那个）。

有什么想法吗？

Answer 1

您可以将文件上传到您选择的任何位置。这会将漫画保存在其 ID 和章节的文件夹中，但保留文件名。如果您想使用漫画 ID 作为文件名，我相信您可以解决。

$basepath = "/home/path/to/www/comics/member_" . $member_id . "/";

function construct_path($chapter_id,$comic_id) 
{
   $saveimagepath = $basepath . $comic_id . $chapter
}

if (!isset($_SESSION['id'])) { 
   echo 'Please <a href="login.php">log in</a> to access your account';
  exit(); 
} 
// Place Session variable 'id' into local variable
$id = $_SESSION['id'];
// Process the form if it is submitted
if ($_FILES['uploadedfile']['tmp_name'] != "") {
    // Run error handling on the file
    // Set Max file size limit to somewhere around 120kb
    $maxfilesize = 400000;
    // Check file size, if too large exit and tell them why
    if($_FILES['uploadedfile']['size'] > $maxfilesize ) { 
        echo "<br /><br />Your image was too large. Must be 400kb or less, please<br /><br />
        <a href=\"upload_comic.php\">click here</a> to try again";
        unlink($_FILES['uploadedfile']['tmp_name']); 
        exit();
    // Check file extension to see if it is .jpg or .gif, if not exit and tell them why
    } else if (!preg_match("/\.(gif|jpg|png)$/i", $_FILES['uploadedfile']['name'] ) ) {
        echo "<br /><br />Your image was not .gif, .jpg, or .png and it must be one of those three formats.<br />
        <a href=\"upload_comic.php\">click here</a> to try again";
        unlink($_FILES['uploadedfile']['tmp_name']);
        exit();
        // If no errors on the file process it and upload to server 
    } else { 
        // Rename the pic
        $newname = $saveimagepath . $_FILES['uploadedfile']['tmp_name']; 
//numbers only, so they show up sequentially
        // Set the direntory for where to upload it, use the member id to hit their folder 
        // Upload the file
        if (move_uploaded_file($_FILES['uploadedfile']['tmp_name'], $newname)) {
            echo "Success, the image has been uploaded and will display to visitors!<br /><br />
            <a href=\"member_account.php\">Click here</a> to return to your profile edit area";
            exit();
        } else {
            echo "There was an error uploading the file, please try again. If it continually fails, contact us by email. <br /><br />
            <a href=\"member_account.php\">Click here</a> to return to your profile edit area";
            exit();
        }
    } // close else after file error checks
} // close if post the form
?>

Answer 2

$_SESSION 变量在使用 session_start() 启动的任何站点上都可用。因此，如果在登录后立即设置 id，则可以在任何其他页面以与 $_SESSION['id'] 相同的方式访问该值。确保 id 的值不会杀死您的文件系统或导致安全问题！