Extracting a number from a string

[jtmathome]

If I have a string "aGhcc123.4", how can I use php to separate the string into "aGhcc" and "123.4". Some strings have numbers in them and some don't.

[NogDog]

Are the numbers always at the end of the string, or can they be in the middle or the start? Can there be more than one set of numbers in a single string?

[jtmathome]

This time the numbers are at the end of the string, and it's usually only one set of numbers with non-separated integers.

[NogDog]

One possibility (untested):

$number = preg_replace('/\D*(\d+(\.\d+)?)/', "$1", $string);