PHP Program for Check if an array is sorted and rotated

<?php
// PHP program to check if an 
// array is sorted and rotated
// clockwise

// Function to check if an array
// is sorted and rotated clockwise
function checkIfSortRotated($arr, $n)
{
    $minEle = PHP_INT_MAX;
    $maxEle = PHP_INT_MIN;

    $minIndex = -1;

    // Find the minimum element
    // and it's index
    for ($i = 0; $i <$n; $i++) 
    {
        if ($arr[$i] < $minEle) 
        {
            $minEle = $arr[$i];
            $minIndex = $i;
        }
    }

    $flag1 = 1;

    // Check if all elements before 
    // minIndex are in increasing order
    for ( $i = 1; $i <$minIndex; $i++) 
    {
        if ($arr[$i] < $arr[$i - 1]) 
        {
            $flag1 = 0;
            break;
        }
    }

    $flag2 = 1;

    // Check if all elements after 
    // minIndex are in increasing order
    for ($i = $minIndex + 1; $i <$n; $i++) 
    {
        if ($arr[$i] < $arr[$i - 1]) 
        {
            $flag2 = 0;
            break;
        }
    }

    // Check if last element of the array
    // is smaller than the element just
    // starting element of the array
    // for arrays like [3,4,6,1,2,5] - not sorted circular array
    if ($flag1 && $flag2 && 
       ($arr[$n - 1] < $arr[0]))
        echo( "YES");
    else
        echo( "NO");
}

// Driver code
$arr = array(3, 4, 5, 1, 2);

//Function Call
$n = count($arr);

checkIfSortRotated($arr, $n);

// This code is contributed
// by inder_verma.
?>