Can't get str_replace() to strip out spaces in a PHP string

Question

Hi, I am getting a PHP string which I need to strip the spaces out of. I have used the following code but when I echo $classname it just displays the string sti

Answer 1

It could be that the space is not really a space, but other form of whitesspace.

You might want to try:

$classname = preg_replace('/\s+/', '', $fieldname);

From here.