为什么我的php移动文件脚本实际上没有移动文件？

Question

I am uploading files to a server using php and while the move_uploaded_file function returns no errors, the file is not in the destination folder. As you can see I am using the exact path from root, and the files being uploaded are lower than the max size.

$target = "/data/array1/users/ultimate/public_html/Uploads/2010/";  
//Write the info to the bioHold xml file.
$xml = new DOMDocument();
$xml->load('bioHold.xml');
$xml->formatOutput = true;
$root = $xml->firstChild;
$player = $xml->createElement("player");
$image = $xml->createElement("image");
$image->setAttribute("loc", $target.basename($_FILES['image']['name']));
$player->appendChild($image);
$name = $xml->createElement("name", $_POST['name']);
$player->appendChild($name);
$number = $xml->createElement("number", $_POST['number']);
$player->appendChild($number);
$ghettoYear = $xml->createElement("ghettoYear", $_POST['ghetto']);
$player->appendChild($ghettoYear);
$schoolYear = $xml->createElement("schoolYear", $_POST['school']);
$player->appendChild($schoolYear);
$bio = $xml->createElement("bio", $_POST['bio']);
$player->appendChild($bio);
$root->appendChild($player);
$xml->save("bioHold.xml");
//Save the image to the server.
$target = $target.basename($_FILES['image']['name']);
if(is_uploaded_file($_FILES['image']['tmp_name']))
    echo 'It is a file <br />';
if(!(move_uploaded_file($_FILES['image']['tmp_name'], $target))) {
    echo $_FILES['image']['error']."<br />";
}
else {
    echo $_FILES['image']['error']."<br />";
    echo $target;   
}

Any help is appreciated.

Eric R.

Answer 1

Most like this is a permissions issue. I'm going to assume you don't have any kind of direct shell access to check this stuff directly, so here's how to do it from within the script:

Check if the $target directory exists:

$target = '/data/etc....';
if (!is_dir($target)) {
    die("Directory $target is not a directory");
}

Check if it's writeable:

if (!is_writable($target)) {
    die("Directory $target is not writeable");
}

Check if the full target filename exists/is writable - maybe it exists but can't be overwritten:

 $target = $target . basename($_FILES['image']['name']);
 if (!is_writeable($target)) {
     die("File $target isn't writeable");
 }

Beyond that:

if(!(move_uploaded_file($_FILES['image']['tmp_name'], $target))) {
    echo $_FILES['image']['error']."<br />";
}

Echoing out the error parameter here is of no use, it refers purely to the upload process. If the file was uploaded correctly, but could not be moved, this will still only echo out a 0 (e.g. the UPLOAD_ERR_OK constant). The proper way of checking for errors goes something like this:

if ($_FILES['images']['error'] === UPLOAD_ERR_OK) {
    // file was properly uploaded
    if (!is_uploaded_File(...)) {
        die("Something done goofed - not uploaded file");
    }
    if (!move_uploaded_file(...)) {
        echo "Couldn't move file, possible diagnostic information:"
        print_r(error_get_last());
        die();

    }
} else {
    die("Upload failed with error {$_FILES['images']['error']}");
}