创建目录，如果不存在，则移动文件

Question

I have the following code to upload a file:

<?php
//set the image size in mb
$max_upload_size='10';
$MAXIMUM_FILESIZE = $max_upload_size * 1024 * 1024;
get_current_user();
global $current_user;
$uploaddir = './uploads/file/'.$current_user->user_login.'/'; 
$file = $uploaddir . basename($_FILES['uploadfile']['name']); 
if ($_FILES['uploadfile']['size']<$MAXIMUM_FILESIZE) {
if (move_uploaded_file($_FILES['uploadfile']['tmp_name'], $file)) { 
  echo "success"; 
} else {
    echo "error";
}
}else{
    echo"size_error";
}
?>

This works great if the user_login already exists under /uploads/file/ directory. How can I create the directory that is based on variable $current_user->user_login if it doesn't exists? If exists then continue on the next code.

Answer 1

From http://nz.php.net/manual/en/function.move-uploaded-file.php#105026:

The destination directory must exist; move_uploaded_file() will not automatically create it for you.

Just use is_dir and mkdir.

<?php
//set the image size in mb
$max_upload_size='10';
$MAXIMUM_FILESIZE = $max_upload_size * 1024 * 1024;
global $current_user;
$current_user = get_current_user();
$uploaddir = './uploads/file/'.$current_user->user_login.'/';
if (!is_dir($uploaddir) && !mkdir($uploaddir)){
  die("Error creating folder $uploaddir");
}
$file = $uploaddir . basename($_FILES['uploadfile']['name']); 
if ($_FILES['uploadfile']['size']<$MAXIMUM_FILESIZE) {
if (move_uploaded_file($_FILES['uploadfile']['tmp_name'], $file)) { 
  echo "success"; 
} else {
    echo "error";
}
}else{
    echo"size_error";
}
?>