Question

I wonder how to remove a “question mark char” from string like that:

8�901.9631

I’d like to use regex. I’m trying with this regex:

#(\d+).(\d+(?:\.\d{1,4})?)#

But it doesn’t work.

Answer 1

If you know all other characters are numbers and periods, you could do this:

$string = '8�901.9631';
$new_string = preg_replace('/[^\d\.]/', '', $string);
echo $new_string; //8901.9631

Basically this is removing everything that is not ([^ ]) a number (\d) or a period (\.).