printf - php - using sprintf to add "+" sign removes decimals from formatted number -

i want show changes in stock index:

12 => +12.00 150.5 => +150.50 -30.2 => -30.20 -2.85193 => -2.85

i've got this:

sprintf("%+d", number_format(floatval($key), 2, '.', ','))

but it's stripping decimals formatted number , returning things +45.

is there efficient way both + sign , decimals?

%d integers, have use %f floating point.

sprintf("%+.2f", $key);

unfortunately, can't commas this. wouldn't have worked original code, because %d parses argument integer, , stop reading number when gets comma.

if need both sign , commas, can do:

($key >= 0 ? '+' : '') . number_format(floatval($key), 2, '.', ','))

EXIT