PHP 16进制颜色转RGB格式

function hex2rgb($hexColor)
{
    $color = str_replace('#', '', $hexColor);
    if (strlen($color) > 3) {
        $rgb = array(
            'r' => hexdec(substr($color, 0, 2)),
            'g' => hexdec(substr($color, 2, 2)),
            'b' => hexdec(substr($color, 4, 2)),
            'a' => 100,
        );
    } else {
        $r = substr($color, 0, 1) . substr($color, 0, 1);
        $g = substr($color, 1, 1) . substr($color, 1, 1);
        $b = substr($color, 2, 1) . substr($color, 2, 1);
        $rgb = array(
            'r' => hexdec($r),
            'g' => hexdec($g),
            'b' => hexdec($b),
            'a' => 100,
        );
    }
    return $rgb;
}