forcing round() to add trailing 0's

[dmmh]

I'm using a webservice to query for currency conversion rates and this returns me a value which I use round() on like round($string, 2) to force two chars behind the comma, but it doesnt output a trailing zero if there is one

eg, it will return 124,1 instead of 124,10

how can I bypass this?

[dcrombie]

number_format [php.net]

;)

[dmmh]

ic, thx :)