Parse currency from string

Question

I want to parse a currency from a string in PHP, I\'ve had a look at number formatter but haven\'t got PHP 5.3 or the ability to add extensions.

The currency will on

Answer 1

(float)substr($input, strpos($input, "£")+1);

This will get you the following results:

float(0.9)
float(100)
float(100.1)
float(1000)
float(153.93)

EDIT: updated to reflect the change to question. this is assuming all strings are like the one you gave as an example.