如何从PHP的单个数组中提取3个唯一值？

Question

I have an array that I need to pull multiple values from but I can't have any of those values repeat.

This is what I am doing now, but it does not discourage multiples of the same value.

My array is:

$boom = array("1", "2", "3", "4", "5", "6");

And I am using 3 of this code to pull the values:

echo $boom[array_rand($boom,1)];

The end result in the context of the page looks like this - "1, 4, 3" (or any variation of the numbers...) But my issue is that I have a need for the script to pull 3 non-repeating values.

How can I do that?

Answer 1

Use array_unique() to get unique values then use shuffle() to random the order. Then you can use array_slice() to get the first three element and you can use implode() to output them as a comma separated string.

$a = array_unique(array("1", "2", "3", "4", "5", "6"));
shuffle($a);
$b = array_slice($a, 0, 3);
echo implode(',', $b);

Demo