Write a program to get second highest number in an array using PHP?

function displaySecondHighest($arr, $arr_size)
{      
    if ($arr_size < 2)
    {
        echo(" Invalid Input ");
        return;
    }  
    $first = $second = PHP_INT_MIN;
    for ($i = 0; $i < $arr_size ; $i++)
    {
        if ($arr[$i] > $first)
        {
            $second = $first;
            $first = $arr[$i];
        } else if ($arr[$i] > $second &&
            $arr[$i] != $first)
            $second = $arr[$i];
        }
    if ($second == PHP_INT_MIN)
        echo("There is no second largest element\n");
    else
        echo("The second largest element is " . $second . "\n");
}
 
// Here is your Array
$arr = array(12, 35, 1, 10, 34, 1);
$n = sizeof($arr);
displaySecondHighest($arr, $n);
 
Output:

34