How to get functions.php to talk to options.php

Question

I am using Options Framework to build a list of theme options (using code from the theme, not the plugin).

I have a colour picker as an option, and I can set and call this colour okay.

I'd like to convert the RGB value to HSV, and I found the code to do that here.

I entered this code into my functions.php, in a function called convert_RGA_HSV (on pastebin). It accepts a RGB colour, and returns an array($H, $S, $V).

Also in functions.php I have:

function set_HSV () {
    $varcolour = of_get_option('custom_colour');
    $varhsv = convert_RGA_HSV($varcolour);
    add_option( 'hsv', $varhsv, '', 'yes' );
}

add_action( 'after_setup_theme', 'set_HSV' );   

of_get_option is the function built into the Options Framework to return a value of an option.

I don't know if this set_HSV function is being run, or if it is not working properly, as no option called hsv is being inserted into theme options.

Answer 1

When you save an array of data in an option, WordPress serializes it to save, then when you use get_option, it gets unserialized back into the original array, so it can be accessed as you'd access any indexed array without keys in php:

original option added:

$hsv = array('hval','sval','vval');
add_option('hsv', $hsv);

then, to access this data:

$hsv = get_option('hsv');
echo 'h value is ' . $hsv[0];
echo 's value is ' . $hsv[1];
echo 'v value is ' . $hsv[2];