Question

I have an array with about 360 keys:

$threadColours['Apricot'] = array(250,180,160,3341,328,826,194,3332,0);
$threadColours['Apricot, Light'] = array(255,230,225,3824,8,833,2605,-1,1);
$threadColours['Apricot, Medium'] = array(255,135,105,3340,329,827,193,-1,2);

I am retrieving a pixel rgb values that came from this array. So I need to get the key where, for example, $threadColours[???][0]=250, [1]=180, [2]=160. I know you can search for a single key but I cannot figure out how to match multiple values. Just to be clear, I have the rgb values I just want to know how to get the key that has all three values in [0],[1],[2] respectively.

Thank you much,
Todd

Answer 1

function getColourKey($colours, $r, $g, $b) {
    foreach ($colours as $key => $value)
        if ($value[0] == $r && $value[1] == $g && $value[2] == $b)
            return $key;
    return NULL;
}