RGBA format HEX into RGB format HEX? PHP

Question

I want to convert back and forth between RGBA-formated HEX colors (like0xFF0000FF) and RGB-formated HEX colors (like 0xFF0000) in PHP.

How

Answer 1

These two functions will do what you need:

function rgbaToRgb ($rgba) {
    return substr($rgba, 0, -2);
}

function rgbToRgba ($rgb) {
    return $rgb . "FF";
}

The first one simply removes the last two characters, whilst the second one simply appends FF.