<?phpfunction randomColor() {  $str = '#';  for($i = 0 ; $i < 6 ; $i++) {    $randNum = rand(0 , 15);    switch ($randNum) {      case 10: $randNum = 'A'; break;      case 11: $randNum = 'B'; break;      case 12: $randNum = 'C'; break;      case 13: $randNum = 'D'; break;      case 14: $randNum = 'E'; break;      case 15: $randNum = 'F'; break;    }    $str .= $randNum;  }  return $str;}$color = randomColor();echo $color;?>