Convert HEX value to RGBA

hextorgba.php

      function mk_convert_rgba($colour, $alpha)
      {
            if (!empty($colour)) {
                  if ($alpha >= 0.95) {
                        return $colour; // If alpha is equal 1 no need to convert to RGBA, so we are ok with it. :)
                  } else {
                        if ($colour[0] == '#') {
                              $colour = substr($colour, 1);
                        }
                        if (strlen($colour) == 6) {
                              list($r, $g, $b) = array(
                                    $colour[0] . $colour[1],
                                    $colour[2] . $colour[3],
                                    $colour[4] . $colour[5]
                              );
                        } elseif (strlen($colour) == 3) {
                              list($r, $g, $b) = array(
                                    $colour[0] . $colour[0],
                                    $colour[1] . $colour[1],
                                    $colour[2] . $colour[2]
                              );
                        } else {
                              return false;
                        }
                        $r      = hexdec($r);
                        $g      = hexdec($g);
                        $b      = hexdec($b);
                        $output = array(
                              'red' => $r,
                              'green' => $g,
                              'blue' => $b
                        );
                        
                        return 'rgba(' . implode($output, ',') . ',' . $alpha . ')';
                  }
            }
      }