从文件名字符串中移除空格PHP [复制]

I'm creating an image upload form and I need to name the images the user's name and dog's name when it is added into my database, and added into my upload folder.

I currently have this working like this:

1. I use the POST method at the top of my script to pull in the user name and dog name from the form.
2. I then use that info to rename the file/image being uploaded
3. Then I insert into my database

$user_name = $_POST['user_name'];
$dog_name  = $_POST['dog_name'];

$file_name = $imgDir . $user_name .'-'. $dog_name .'-'. $random_number . $ext;

When inserting into the table I use the following:

'file_name' => str_replace("../path/to/images/", "", $file_name),

The current output of the file name is like this: John-Fido-123456.jpg

How would I remove the spaces in file name if the user entered their last name like this?

John Doe-Fido Doe-123456.jpg

Update: Thanks to @HiDeo i used the dup link that he posted and was able to figure it out like this.

Using the Post method to grab the names I needed. I striped the white spaces like so and it worked on the file name in the database and the actual image in the folder.

$user_name  =   $_POST['user_name'];
$dog_name   =   $_POST['dog_name'];


$user_name = preg_replace('/\s+/', '', $user_name);
$dog_name  = preg_replace('/\s+/', '', $dog_name );

</div>

You can use:

'file_name' => str_replace(" ", "", $file_name);

Well, this will replace all white-spaces with nothing... (i.e. Remove all whitespace)...

The code suggestion is based on your code

Hope this helps...:)