Calculate colour temperature in K

Question

I have written a lib for working with colours and stuck trying to calculate Tc(k). From what I have read working in the CIE 1931 XYZ colour space i

Answer 1

Found the Temperature to RGB solution written in JavaScript and converted it into PHP.

 clamp($red,   0, 255),
        'g' => clamp($green, 0, 255),
        'b' => clamp($blue,  0, 255)
    ];
}

function clamp($x, $min, $max)
{
    if ($x < $min)
        return $min;

    if ($x > $max)
        return $max;

    return $x;
}

var_dump(colorTemperatureToRGB(7000));