PHP文件上载无法工作的可能原因

Question

Here is the HTML:

<h1>Upload Custom Logo</h1>
<form action="settings.php" enctype="multipart/form-data" method="post">
<input type="file" name="Logo" />
<input type="submit" value="Upload" name="logoUpload" />
</form>

Here is the PHP:

<?php /* Handle Logo Upload */
if($_POST['logoUpload']) {

$target_path = "uploads/";
$Logo = $_FILES['Logo']['name'];

$target_path = $target_path . basename( $_FILES['Logo']['name']); 

if(move_uploaded_file($_FILES['uploadedfile']['tmp_name'], $target_path)) {
    echo '<div class="statusUpdate">The file '.  basename( $_FILES['Logo']['name']). 
        ' has been uploaded</div>';
    }   

} else{
    echo '<div class="statusUpdate">There was an error uploading the file to: '.$target_path.', please try again!  Error Code was: '.$_FILES['Logo']['error'].'</div>';
}

}
?>

It always goes to the "else" statement on that code, I have an uploads folder in the same directory as this php file set to 777 file permissions. The image I am test uploading is under 10KB in size. But the move_uploaded_file() always fails and it doesn't return any error message except for the custom error message made with the else statement.

Answer 1

Possible reasons:

• The uploading of the file failed in some way.
• You don't have permission to move the file to the target path.

As PHP.NET says:

If filename is not a valid upload file, then no action will occur, and move_uploaded_file() will return FALSE.

If filename is a valid upload file, but cannot be moved for some reason, no action will occur, and move_uploaded_file() will return FALSE. Additionally, a warning will be issued.

Reference: http://php.net/manual/en/function.move-uploaded-file.php