<?php
/*
 * Created on 2016-11-25
 *
 */
 if (isset($_POST['sub'])) {
  $what = $_POST['what'];
  //需要輸入的數(shù)組
  $my_array = array("剪刀","石頭","布");
  //獲勝規(guī)則
  $guize = array(array("剪刀","布"),array("布","石頭"),array("石頭","剪刀"));
  //取數(shù)組中的隨機值
  $rand_keys = array_rand($my_array);
  $computer = $my_array[$rand_keys];
  echo "你的".$what."VS ".$computer. "<br/>";
    $input = array($computer,$what);
    //將輸入的what和電腦隨機產(chǎn)生的值構(gòu)造成一個數(shù)組，再判斷在不在獲勝規(guī)則中
    if (!(in_array($what,$my_array))) {
      echo "請輸入 剪刀、石頭、布";
      header("location:index.php");
    }
    if ($computer == $what) {
      echo "噢，平手";
    }elseif (in_array($input,$guize)) {
      echo "電腦勝";
    }else {
      echo "你贏咯~";
    }
 }
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>剪刀石頭布</title>
</head>
<body>
 <form action="" method="post">
 <div align="center">剪刀石頭布，你出什么？<br/>
 <input type="radio" name="what" value="剪刀"/>剪刀<br/>
 <input type="radio" name="what" value="石頭"/>石頭<br/>
 <input type="radio" name="what" value="布"/>布<br/>
 </div>
 <p align="center">
 <input type="submit" name="sub" value="開始！" />
 <input type="reset" name="" value="重置" />
 </p>
 </form>
</body>
</html>

運行效果圖如下：