PHP十六进制颜色随机生成器功能示例

<?php
function 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;
?>