Question

I have an array:

Array
(
    [red] => 252
    [green] => 168
    [blue] => 166
    [alpha] => 0
)

It’s an output of function imagecolorsforindex.
How can I get a HTML code from these elements? For example: #99CCFF

Answer 1

Strictly speaking you can’t, since alpha is not supported. But since the alpha is 0, we can assume that it won’t matter. As such, pass each value into sprintf() with a format specifier of %02x for each element.

c = sprintf('#%02x%02x%02x', val['red'], val['green'], val['blue']);