PHP随机文本一次

Question

I've been looking for the solution of my problem for ages and I still haven't found it so i desided to create a stackoverflow account to ask the question myself.

this is what I created so far:

<? //Chooses a random number $num = Rand (1,2);
switch ($num){
case 1: $retrieved_data = "test"; break;
case 2: $retrieved_data = "test1"; break;
} ?> 

And this is the place where I want the text to appear;

<form enctype="multipart/form-data" action="upload.php" method="POST">
<input name="<?php echo $retrieved_data; ?>" type="file" />
<input name="<?php echo $retrieved_data; ?>" type="file" />
<input type="submit" value="Upload" /></form>

My problem is I want to have the "test1" and "test" randomly displayed on these places but I want them to be different from eachother every time. So if the first input type is "test" I want the second input type to be 'test1" but I can't seem to get this working

Does anyone know what I'm doing wrong or a code to make this possible?

Answer 1

If you have limited number of possibilities, put them int an array, shuffle it and shift/pop elements from it:

$retrieved_data = array('test', 'test1');
shuffle($retrieved_data);

$random1 = array_shift($retrieved_data);
$random2 = array_shift($retrieved_data);