随机PHP不是随机选择一个，不显示信息[关闭]

Question

cannot seem to understand why the bottom random isn't working, it was working before - Any ideas?

<?php 
$num = Rand (1,2,3);
// Based on random Case Number Echos that code
switch ($num) {
case 1:
echo 'CONTENT1';
break;
case 2:
echo 'CONTENT2';
break;
case 3:
echo 'CONTENT3';
break;
}
?>

Answer 1

rand() function should only have two parameters min and max.

So if you want to random 1,2 and 3, it it should be rand(1,3)