PHP - 将图像上传到 FTP 目录，然后显示仅从目录上传的图像
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【中文标题】PHP - 将图像上传到 FTP 目录，然后显示仅从目录上传的图像【英文标题】：PHP - Upload images to FTP directory and then Display images uploaded only from directory 【发布时间】：2013-11-05 18:26:06 【问题描述】：我只是希望在我使用表单文件上传上传图像后，它将在下一页显示这些图像。图像被上传到 ftp 上的文件夹。我到处找，但似乎找不到正确的解决方案。
<form enctype="multipart/form-data" action="upload.php" method="POST">
<input type="hidden" name="MAX_FILE_SIZE" value="100000" />
Choose a file to upload: <input name="uploadedfile_1" type="file" /><br />
Choose a file to upload: <input name="uploadedfile_2" type="file" /><br />
<input type="submit" value="Upload Files" />
</form>
这是下一页的 PHP 代码（upload.php）：
<?php
$ftp_server = "localhost";
$ftp_username = "xxx";
$ftp_password = "xxx";
$conn_id = ftp_connect($ftp_server) or die("could not connect to $ftp_server");
if(@ftp_login($conn_id, $ftp_username, $ftp_password))
echo "connected as $ftp_username@$ftp_server\n";
else
echo "could not connect as $ftp_username\n";
$file = $_FILES["uploadedfile_1"]["name"];
$file2 = $_FILES["uploadedfile_2"]["name"];
$remote_file_path = "/2013/img/".$file;
$remote_file_path2 = "/2013/img/".$file2;
ftp_put($conn_id, $remote_file_path, $_FILES["uploadedfile_1"]["tmp_name"],FTP_ASCII);
ftp_put($conn_id, $remote_file_path2, $_FILES["uploadedfile_2"]["tmp_name"],FTP_ASCII);
ftp_close($conn_id);
echo "\n\nconnection closed";
?>
上面只是上传代码，我不知道我需要使用什么 PHP 代码来显示图像，但通常，我想在 Upload.php 上回显这两个图像。这段代码有没有办法预测上传了哪些图片？
任何帮助将不胜感激。
【问题讨论】：
【参考方案1】：这是一个您可以尝试的完整脚本。
当用户在 PHP 上上传某些内容时，该内容会以临时名称进入一个临时目录。因此，您应该将文件从那里移到所需位置。这就是脚本中的move_uploaded_file() 的作用。此外，为了显示图像，该路径必须可用于您的 Web 服务器，这意味着在 public_html 目录下。为了让 PHP 能够在上传文件后将文件移动到那里，该目录必须是可写的。我添加了一些代码来在当前脚本的目录中创建一个名为uploads 的可写目录。
<html>
<head></head>
<body>
<?php
// The HTML beginning tags must be there or the output won't render
// as a web page
// Local path for storing the files, under the directory of this file
$local_path = dirname(__FILE__) . '/uploads';
// Create the directory if it doesn't exist
if ( ! is_dir( $local_path ) )
mkdir( $local_path );
// Make the directory writable
if ( ! is_writable( $local_path ) )
chmod( $local_path, 0777 );
// Loop through the uploaded files
foreach ( $_FILES as $ul_file )
// Check for upload errors
if ( $ul_file['error'] )
die( "Your file upload failed with error code " . $ul_file['error'] );
// Set a new file name for the temporary file
$new_file_name = $local_path . '/' . $ul_file['name'];
// Move the temporary file away from the temporary directory
if ( ! move_uploaded_file( $ul_file['tmp_name'], $new_file_name ) )
die( "Failed moving the uploaded file" );
// Store the local file paths to an array
$local_file_paths[] = $new_file_name;
// Now do your FTP connection
$ftp_server = "localhost";
$ftp_username = "xxx";
$ftp_password = "xxx";
$conn_id = ftp_connect($ftp_server) or die("Could not connect to $ftp_server");
if ( @ftp_login($conn_id, $ftp_username, $ftp_password) )
echo "<p>Connected as $ftp_username @ $ftp_server</p>";
else
die( "Could not log in as $ftp_username\n" );
// Loop through the local filepaths array we created
foreach ( $local_file_paths as $local_file_path )
// The remote file path on the FTP server is your string +
// the base name of the local file
$remote_file_path = "2013/img/" . basename( $local_file_path );
// Put the file on the server
ftp_put( $conn_id, $remote_file_path, $local_file_path, FTP_BINARY );
echo "<p>Uploaded a file to $remote_file_path</p>";
// Close the connection
ftp_close( $conn_id );
echo "<p>Connection closed. Your images are here:</p>";
// Loop through the file paths again and output an HTML IMG element for each
foreach ( $local_file_paths as $local_file_path )
echo "<img src='$local_file_path' alt='Your uploaded file' />";
// Final HTML tags
?> </body></html>
【讨论】：
【参考方案2】：从您的用户上传 HTTP POST 后，文件会以临时名称转到临时目录。您服务器上的实际文件名包含在$_FILES['uploadedfile_1']['tmp_name'] 和$_FILES['uploadedfile_2']['tmp_name'] 中。 （['name'] 是用户计算机上的原始文件名。）然后您应该检查上传错误，将文件从临时目录中移开，然后您可以通过 FTP 放置它们。最后，您可以输出一个 HTML IMG 元素。
// Check for errors
if ( $_FILES['uploadedfile_1']['error'] )
die( "Upload failed with error code " . $_FILES['uploadedfile_1']['error'] );
// Set a new path for the file. Use the original file name.
$new_path = '/a/writable/path/on/your/system/' . $_FILES['uploadedfile_1']['name'];
// Move the file away from the temporary directory
if ( ! move_uploaded_file( $_FILES['uploadedfile_1']['tmp_name'], $new_path ) )
die( "Failed moving the uploaded file" );
// Put the file on the FTP connection established before
// Use the FTP_BINARY type for image files
ftp_put($conn_id, $remote_file_path, $new_path,FTP_BINARY);
// After closing the connection, output an IMG element
// This works if your $new_path is readable by the web server
echo "<img src='$new_path' alt='Your uploaded file' />";
【讨论】：
我试过了，但没有用。我想我做错了什么。无法在此处发布我的代码，因为它的限制字符。无论如何你可以为我结合php。另外，我对“/a/writable/path/on/your/system/”感到困惑。我应该把什么路径放在这里？ 好的，我在另一个答案中为你写了一个完整的脚本。当然，这些只是示例。【参考方案3】：<html>
<head></head>
<body>
<?php
// The HTML beginning tags must be there or the output won't render
// as a web page
if ($_POST)
// Local path for storing the files, under the directory of this file
$local_path = dirname(__FILE__) . '/uploads';
// Create the directory if it doesn't exist
if (!is_dir($local_path))
mkdir($local_path);
// Make the directory writable
if (!is_writable($local_path))
chmod($local_path, 0777);
// Loop through the uploaded files
foreach ($_FILES as $ul_file)
// Check for upload errors
if ($ul_file['error'])
die("Your file upload failed with error code " . $ul_file['error']);
// Set a new file name for the temporary file
$new_file_name = $local_path . '/' . $ul_file['name'];
// Move the temporary file away from the temporary directory
if (!move_uploaded_file($ul_file['tmp_name'], $new_file_name) )
die("Failed moving the uploaded file");
// Store the local file paths to an array
$local_file_paths[] = $new_file_name;
// Now do your FTP connection
$ftp_server = "server";
$ftp_username = "username";
$ftp_password = "password";
$conn_id = ftp_connect($ftp_server) or die("Could not connect to $ftp_server");
if (@ftp_login($conn_id, $ftp_username, $ftp_password))
echo "<p>Connected as $ftp_username @ $ftp_server</p>";
else
die("Could not log in as $ftp_username\n");
// Loop through the local filepaths array we created
foreach ($local_file_paths as $local_file_path)
// The remote file path on the FTP server is your string +
// the base name of the local file
$remote_file_path = basename( $local_file_path );
// Put the file on the server
ftp_put( $conn_id, $remote_file_path, $local_file_path, FTP_BINARY );
echo "<p>Uploaded a file to $remote_file_path</p>";
// Close the connection
ftp_close($conn_id);
?>
<form enctype="multipart/form-data" action="img_upload.php" method="POST">
<input type="hidden" name="MAX_FILE_SIZE" value="1000000" />
Choose a file to upload: <input name="uploadedfile_1" type="file" /><br />
Choose a file to upload: <input name="uploadedfile_2" type="file" /><br />
<input type="submit" value="Upload Files" />
</form>
</body>
</html>
【讨论】：
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