Getting lowest value in array or random value if a

问题:

I have an array like so

Array
(
    [5] => 0
    [6] => 0
)

the key 5 and key 6 are user id's. the value 0 for both the keys are the number of posts they have.

How do i obtain the user with the lowest post and if there are more than 1 user with the same/lowest post, select one by random.

Thank you

回答1:

What you need is min() for the lowest value in the array and array_rand() to get a random entry out of the array.

$yourArr = array(4, 4, 3, 5);

$lowestEntry = min($yourArr);
$duplicateEntries = array_keys($yourArr, $lowestEntry);

echo (count($duplicateEntries) > 1)?$yourArr[array_rand($duplicateEntries, 1)]:$lowestEntry;

回答2:

Let's say your array is $arr

$mini = min($arr);
$user = array();
foreach ($arr as $key => $val){
    if ($val == $mini){
        // find the user with minimum value
        $user[] = $key;
    }
}
// print the user with minimum value
echo array_rand($user, 1).' '.$mini;