PHP rock paper scissors programming ideas, web version

After reading the shell version released by netizens of Open Source China, I tried to try it out. I hope you will not hesitate to let me know if there are any shortcomings.

 Guess the Love





 Rock, paper, scissors, what did you come up with? * Rock, Paper, Scissors



 < /body>

 if (isset($_POST['sub'])) {
 $what = $_POST['what'];

 //Array to be input
 $my_array = array( "Scissors","Rock","Paper");

 //Winning Rules
 $guize = array(array("Scissors","Paper"),array("Paper","Stone"),array(" Rock","Scissors"));

 //Get random values ​​from the array
 $rand_keys = array_rand($my_array);
 $computer = $my_array[$rand_keys];

 echo $computer. "n";


 $input = array($computer,$what);
 //Construct the input what and the value randomly generated by the computer into an array, and then determine whether it is within the winning rule

 if (!(in_array($what ,$my_array))) {
 echo "Please enter scissors, rock, paper";
 header("location:index.php");
 }

 if ($computer == $what) {
 echo "Oh, Tie";
 }elseif (in_array($input,$guize)) {
 echo "The computer wins";
 }else {
 echo "You win~";

 }

 }

 ?>