seperate streetname from number

Hi everyone! I wondered how to sepearate string variables that contain streetnames and numbers: If for example $variable="Hauptstraße 15"; $variable_string[0] should be "Hauptstraße" $variable_string[1] should be "15" So I need a function that recognizes a number and explodes the variable at that very position. It's important that the thing also works when $variable="Hauptstraße15"; without any space. Else it would have been easy to do with the explode function... Regards André